2012 silverado rpm fluctuation It always happens after driving it, if I give it a little throttle the temp comes down. Jan 29, 2021 · I have a 2006 5. 0l, crew cab, long box replaced w flatbed Does your car's engine sputter and jerk erratically while idling? This can be caused by a fluctuating RPM (revolutions per minute). Very annoying to me as past vehicles I've owned will hold the speed dead nuts, uphill, downhill Nov 21, 2010 · 2004 4. If you try to maintain your speed (by pedal or cruise control) between 45 and 60 mph an intermittent slight RPM surge of accompanied by a vibration or shudder occurs. May 7, 2018 · Hey, I have a 2009 GMC sierra 5. You won't hear or see the thud but Mar 6, 2023 · In this guide, we examine the most common causes of why your RPM is fluctuating while driving. Engine predominantly ran colder than right in the middle of the gauge (around 190 degrees) and oil pressure sat a steady 40 psi cruising. It looks like it is the lockup switching in Mar 20, 2018 · 2012 silverado 4x4, 5. Short jerky spurts from way below idle up to about 2,500 - 3,000 RPM. what a pain. I have read a good bit on here and some other sites. Mine started after going to bigger rims without changing the speedo settings in the tune. Leaks in the intake manifold can affect engine performance and cause RPM instability. Speedometer bounces all over the place. 1588 posts · Joined 2012 Hi guys,i know im a little late to the party,but i have a 2001 silverado z71 with a 5. Dec 26, 2013 · 2014 Silverado 5. 3 once it gets hot at idle in park or drive the rpms fluctuate and the engine thuds while it happens, not a vibration or a shake but like a slap with each fluctuation on the needle. 0 engine. I am new to this site and recently purchased a 2012 Silverado Z-71 with the All Star Edition. Modern engines are designed to adjust for these factors, but extreme conditions can still lead to noticeable fluctuations. I have never been hard on this truck or ever took it off road. I will crank it and the pressure will start out a little below halfway past 40 and the more i run it the more the pressure falls. 8 4WD EC-2011 Rogue SL AWD-2006 Accord Sedan EX-L K24 5MT-2012 Tacoma DCSB V6 6MT 4WD-2011 Civic Si Sedan-2001 Pathfinder VQ35 5MT 4WD-1997 Pathfinder VG33 4AT 4WD-1999 ML320 4WD-1997 Accord LX Sedan F22 4AT I have a 2017 silverado 4. I believe its a TPS/RPM/Speed correlation issue. These trucks idle at such a low rpm (400-450?) it makes the oil pressure go way down, too. It could be a connection issue too. 26 Satisfied Customers. The battery gauges on most vehicles I What Would Cause Slight Rpm Fluctuation While Idling on a 5. I filled the coolant as usual. 2L L9H - Airaid MIT, Ported 90mm TB, 1 7/8" Kooks long tubes, Slowhawk Tuned May 30, 2022 · 2011 GMC Sierra 1500 5. 190k miles with a 6. 3 Vortec engine due to factors such as a clogged air filter, dirty throttle body, or a vacuum leak. Cold weather can cause RPM fluctuations as the engine works harder to reach and maintain operating temperature. Now after the oil change, the gauge reads Jan 27, 2016 · Hello. Jun 13, 2018 · Torque converter shudder, fluctuating RPM, and throttle response lag is gone! $90 and about 2 hours of work is a much better than a $4,500 transmission swap. I sometimes notice it in lower gears at low speeds, and it happens on the highway for a couple seconds at a time pretty regularly if I'm cruising around 1,500 rpms. 3L-55kmiles) exhibits a sluggish hesitation until the mid to upper range and the disappears once it shifts into the next gear. code pops up for cylinder 6. The Chevy Mechanic can help with your truck's jerking and RPM fluctuations. 3 motor/V6. It will startup and run fine first thing in the morning but the more I drive it during the day the worse it runs. Problems with the torque converter or transmission can also result in fluctuating RPMs. Apr 26, 2020 · 2009 Silverado 2500HD CCSB LTZ Diesel FASS 95 Lift Pump (with Baldwin filters), Edge Evolution CTS2 Monitor w/Dash Pod Mount, Factory FF as Tertiary Filter, Bilstein 5100 Stock Height, Steel Diamond Plate Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags. BUT sometimes on a cold start, the initial idle speed starts at roughly 750 rpm. I have been running Sunoco 87, but I think I will try the 89 to see how it does when I am done with this When driving I feel the my truck jerk randomly and the rpm fluctuates when it jerks, and feel random vibrations for a. to/4aaYNOk - All-in-One OBDII Car Scanner Become a Sponsor - https://bit. It does it also on cruise control. Dec 16, 2015 · Please help! I've changed everything from the plugs, wires, distributor cap and rotor to the IAC, MAP sensor, EGR valve and solenoid, ICM, coolant temp sensor, and TPS. com Jan 22, 2020 · At higher speeds like 80, when it happens, there is a quick vibration like going over rumble strips on the road, every time the RPM's jump. Causes of RPM Fluctuation While Driving. 3ff 6L80. One of the most common causes of RPM fluctuation at idle is a vacuum leak. It starts on the upper side of 14 when first starting but then after 10 or 20 mins it drops to about 11ish. I just bought the truck a couple of months ago and it had a new oil pump installed at the time of purchase. about a 200 rpm change. I'm using the same oil QS Jun 21, 2022 · Hey all. In this video, we'll trou Jan 8, 2025 · The oil pressure gauge is always moving unless I'm on cruise control. I've recently replaced the MAF & Map Sensor, new plugs/coils and fuel system cleaning. The engines RPMs seem to bounce back and forth 50-100 rpm. It surges from about 1000rpm down to about about 4-500 and back again. Vacuum Leaks Cause RPM Fluctuation at idle. 2012 Silverado Feb 28, 2012 · Mine does it at 45 mph and mine is the TCC locking unlocking. 02. It only has 49,000 miles on it. I always check my oil level and it is good. Worn-out or fouled spark plugs can cause rpm fluctuations. The fluctuation never changes more than 100 to 200 rotations. A vacuum leak can cause similar symptoms to a bad IAC valve, as unmetered air entering the engine disrupts the air-fuel mixture. Spark plugs that are worn out are unable to correctly fire the fuel within the piston at the appropriate time. I can not pinpoint what causes this. it'll lock up then unlock then lock up. Understanding these causes is essential to mastering engine idle Jan 6, 2015 · I have a 4. 0l, crew cab, long box replaced w flatbed. Mar 28, 2018 · PIP5121B Oil Pressure Gauge Fluctuation After Startup and Over 3700 RPM Models Brand: Model: Model Years: VIN: Engine: Transmissions: from to Cadillac Escalade 2015 - 2018 All All 6. About two months ago when I was on the highway I looked down and noticed my engine light was on and my oil pressure was around 20 PSI. Based on those readings, it computes the correct air/fuel mixtures. The Jan 25, 2016 · Recently purchased a 99 Silverado 1500 short bed. to as much as 6 to 10 sec. Engine now has 122k miles on it, bought it with 114k. Does it under light-medium acceleration, low rpms (1500-ish). Probably get it retuned and you should be good. 8L. you'll know its locked up if you ease into throttle and rpms dont loosely float around, it'll be solid like driving a manual trans. RPM fluctuation is a common symptom of worn-out spark plugs, especially in older vehicles. 3 Vortec Engine. 3L 18k miles During cold starts with the gear selector in Park, my initial idle speed is roughly 1100 rpm and then gradually goes down over the next 30 seconds. Usually only 200 maybe 400 and lasting 1 sec. Jan 24, 2012 · While driving at low and high speeds RPM's surge up and down. Jump to Latest 2012 Silverado 1500 Crew LTZ 6. It'll shoot up to 3 and I can fell it kick in and within a second or two will drop back down to 2 Jul 24, 2018 · GM Tech Tip: Oil Pressure Gauge Fluctuation After Startup And Over 3700 RPM. 0l, crew cab, long box Jul 30, 2009 · It could be the torque converter locking and unlocking. Jun 1, 2018 · 2003 Silverado RPM Fluctuation? Jump to Latest 1. this problem is commonly caused by a bad TPS (throttle position sensor) or VSS (vehicle speed sensor) or Jul 15, 2014 · 2014 Silverado RPM fluctuation. I did have it tuned and the flexfuel turned off. This topic has 4 replies, 5 voices, and was last updated 10 years, First I will get up to about 40 MPH which is around 1200 RPM’s. Just replaced the Vehicle Speed sensor and did not fix it. Sponsored. 3L L83 All Jul 30, 2021 · Subject: Information On Voltmeter Gauge Fluctuation Due To Regulated Voltage Control System 2012 Silverado 3500 dually, 6. Customer: I have a 2012 Silverado 1500 with 4. A malfunctioning TPS can lead to erratic acceleration and RPM changes. 2000 Silverado Z71 4x4 5. Pushing on the brake pedal will make it stop revving up and down. The rpm fluctuates about 100 to 200 Jul 23, 2017 · I have a 2009 GMC Sierra 1500 5. I also increased my idle rpm by 100. V6 4L60E trans. Maintained. It appears the needle fluctuates between 12 and 15 or volts. The RPMs will start bouncing up and down #shorts #short HiIf you are looking for help with your Automotive Repairs, Automobile Installations, Mechanical Repair or Adjustment, please head over to car Sep 25, 2018 · Excessive engine RPM fluctuation that may be described as frequent tachometer needle movement at constant speed when engine speed is below 1600 RPM. This occurs when engine vacuum pulls air through a faulty seal or gasket into the intake manifold, causing an imbalance of air and fuel in the combustion chamber. If it's in overdrive the shudder is fairly strong. AndrewH0606 | Expert. 2012 Silverado 3500 dually, 6. On the other hand, high temperatures may strain cooling systems, indirectly affecting how stable the idle may be. Replace the spark plugs if they are worn out or fouled. Feb 4, 2024 · Since this was a good time to aslo replace reservoir tank and reinstall a oem radiator this completed a refurbished cooling system as well as lubrication system, however I have had coolant temp gauge fluctuates somewhere at 180 degrees F to to 210 degrees F, system has been bleed out air possibly however the gauge fluctuations has me spent out Sep 26, 2012 · Hey all. You must address any signs as soon as they appear. Nov 19, 2019 · -2012 Silverado LS 4. Check the engine vacuum and make sure there are no leaks. A dirty or malfunctioning IAC valve could cause the fluctuating RPM you're experiencing. If it occurs, your auto revs at high RPM due to the torque converter or gearbox band slippage. When i drive at a steady speed manual or on cruise control my engine rpm starts to go up and down by about 150 rpm. 3L engine. It’s likely happening during light throttle at speeds between 40-60 mph, and deactivating DFM doesn’t resolve the issue. Feb 20, 2017 · RPM Fluctuation at 45-50mph. My coolant level regulated and after the first drive the temp started fluctuating from normal temp to just over 210. 3 and it does the https://amzn. My oil pressure has been fluctuating and its only got worse here lately. When it Nov 21, 2019 · Hi all. Many RPM fluctuations are caused by transmission problems. 500 rpms. Its to the point where the truck shudders a bit. The first, is that when im sitting at idle and turn the fan to max with the AC on the RPMs surge up and down by about 250-500. My 12 silverado, since new, the cruise varies + or - 3 to 4 mph going over simple in town over passes. Idle Air Control Valve (IAC) if faulty, it disrupts airflow at idle, causing RPM fluctuations. While dealerships may point to torque converter issues, it’s essential to explore other potential Oct 28, 2017 · Changed spark plugs and used injector cleaner. At higher RPMs it seems stable and it’s mostly noticeable when driving slow in lower gears but is still noticeable even at highway speed. To determine if it's the converter or not drive it at 45 MPH and when it starts surging press the brake pedal down about 1 or 2 inches. 120 sitting still. 45mph Aug 9, 2021 · Voltmeter Fluctuation Condition Some customers may comment that the voltmeter is fluctuating between 12 and 14 volts on their full-size pickup or utility vehicle. Truck starts fine and runs fine at an idle when cold. I installed an auxiliary transmission cooler, which has made a huge difference in my transmission temperature. Jump to Latest 21 - 40 of 49 Posts. On the gauge it will run just above 14v, then drop down to about 12v, then drop halfway between 9v and 14v and run there for a few minutes then it might jump back up. None seem to be '07-'13 6 speeds tho. voltage gauge varies depending on RPM and when going from high RPM to idle, lights dim, air conditioning blower slows. Dec 26, 2023 · The engine idles just above 500 RPM which I have heard is normal. 3L RPMs fluctuating. My 2010 Silverado 5. 3L V8. It seems to happen primarily when traveling between 45-55mph. May 11, 2023 · I recently bought a 2019 Chevy Silverado LD 4 months ago with the 5. 623843 Feb 23, 2022 Oct 3, 2016 · I have an obvious misfire at idle which makes the engine stumble about every two seconds and I notice a slight RPM fluctuation on the tach. 10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, firestone airbags w/onboard air compressor Nov 6, 2022 · Only happens at lockup on highway or at 1100-1300 RPM- very light pedal just to maintain speed- you can see the tach jump and feel a hesitation. Before the oil change, the oil pressure gauge was reading 40 PSI regardless of my driving conditions, highway, or city. Usually takes a couple hundred miles to take full effect. Lastly, your RPM may fluctuate due to a transmission leak. 3, 6L80, typical cat back and intake tube, suddenly started this random jerking/bucking, exactly like a random misfire, but no codes, no misfires on counter. 3l and 6-speed AT, I experience an intermittent shudder between 1,000 and 1. lol 2023 Chevy Traverse Drk Cherry Premier with Towpack, 2019 VW Passat R-Line Tourmaline Blue, (3) Mercury Milans (2007 & 2009), 1993 Saab 900S Ruby Red Convertible Aug 23, 2016 · #PIP5337: Shake Or Shudder On Acceleration Excessive Engine RPM Fluctuation - (Oct 13, 2015) Subject: Shake Or Shudder On Acceleration Excessive Engine RPM Fluctuation Models: 2015 - 2016 Cadillac Escalade, Escalade ESV 2015 - 2016 Chevrolet Silverado 2015 - 2016 GMC Sierra, Yukon, Yukon XL Equipped with 8L90 Automatic Transmission (RPOs M5U) Apr 27, 2015 · My rpm is fluctuating at the same throttle position. 2 NHT - 2013 GMC Sierra SLT 6. If its an 8 speed transmission, there is an updated fluid that should eliminate the rpm fluctuations and improve shift quality. No leaks. Aug 3, 2022 · 2009 GMC Yukon XL SLT 5. Several ways can help you diagnose RPM issues on your Chevy Silverado. Listen for a whining sound coming from your Silverado’s engine. Also did a TBI rebuild with all new gaskets and vacuum lines. Now after an oil change the Dec 22, 2016 · Subject: Information on Voltmeter Gauge Fluctuation Due to Regulated Voltage Control System and Concerns About Camper/Trailer Battery Charging #07-06-03-009 - (12/05/2007) Models: 2005-2008 Cadillac Escalade Models 2005-2008 Chevrolet Avalanche, Silverado, Silverado Classic, Suburban, Tahoe 2005-2008 GMC Sierra, Sierra Classic, Yukon Models Nov 19, 2019 · After cleaning the throttle body and MAS filter , Noticed that the RPM fluctuates at idle I used a new scanner ( FOXWELL NT301) I bought , it shows RPM is between 559 to 688. Does the fluctuating have anything to do with engine (injectors) or do I need to clean the throttle body of possible carbon build up that would affect the rpms the fluctuate at idle but not during driving. 3 AFM Silverado w/66,000miles has been RPM surging while driving over the past couple weeks. Another thing I remember seeing was a slight +/- of 100-200 rpm fluctuation while cruising and holding speed on the Tachometer EX. The car drives smoothly no problems. Leaks in the engine vacuum can cause rpm fluctuations. 3L LV3 5. I am not comfortable with that. The other day driving at 50-60 i started getting a 200 rpm fluctuation aling with a slight bump like a miss almost. I am Aug 15, 2018 · 2011 CC 4x4, 152k, Lew tuned 5. So picture this: I slow down to make a left turn onto the interstate. 5K views 5 replies 4 participants last post by . This past week or so I’ve been noticing quite a voltage fluctuation on my truck. Starting with the 2005 model year, light duty full size pickups and utilities are equipped with a new Regulated Voltage Control (RVC) system. Nov 23, 2016 · Hi gents, new here and looking for a little wisdom. I just purchased a 2014 Chevrolet Silverado LT with the 4. A shudder feeling that may be described as driving over rumble strips or rough pavement. 2L L86 All Chevrolet Silverado 1500 2014 - 2018 All All 4. Aug 5, 2017 · If you drove it harder (3500-4500rpm) it was less noticeable. 2L (RPOs L86 and LT1) Jun 9, 2012 · 1. See full list on offroadmotorist. -'16 Equinox 3. This 2017 Chevy Traverse surges and SHUDDERS under load when the torque conve Feb 16, 2022 · RPM fluctuating While driving Jump to Latest 4. Is the oil Oct 5, 2023 · 2000 Chevy Silverado 1500 4. Despite your best efforts at idle adjustment, you might notice a slight RPM fluctuation on your 5. Jul 10, 2018 · I just bought a 2012 silverado LS 4. 3 Flex Fuel motor in the morning does the same thing. ly/JoinMaxCarGuy In this short video I will tell you about 8 of th Content blocked Please turn off your ad blocker. You may notice one or more of the following: Reduced engine performance: fluctuations in the RPM compromise the overall engine performance. If I speed up to > 2000 RPM, the issue Jul 24, 2020 · 2012 Surge, RPM Flutterbegging for help! '20 High Country Silver Ice Met. 6 AWD LTZ -'23 Silverado 6. any ideas ? Yet another "newer" car that already has a drivetrain problem before 100k miles. Aug 29, 2023 · Throttle body obstruction can cause rpm fluctuations. We also look at how to diagnose the problem and fix it for a smoother ride. Feb 2, 2012 · To diagnose if the random tachometer needle movement is caused by AFM transition, shift the transmission to manual mode (M), select 5th gear (M5) and drive the vehicle under the same conditions. Apr 20, 2012 · Engine Surge/ RPM Fluctuation Jump to Latest 16K views 5 replies 5 participants last post by Dean508 Dec 26, 2012 Feb 22, 2023 · If not solved in time, this issue could make acceleration difficult from a complete stop, hurt your fuel economy, and cause RPM fluctuations. It is not that it is switching between 4 and 8 cill mode. Apr 27, 2015 · My 2008 Silverado(5,3 l 4L60E) has strange rpm fluctuations. About 5 minutes later I got in, turned the key and was off on my way. It will do it for a few days then go away for a week or maybe a couple months to come back for no apparent reason. to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. And, how would you like to connect with the Mechanic - phone call or online chat? Customer: Online chat Jan 26, 2025 · 2004 Sierra 3500 dually, 6. Thanks for the info. Jan 31, 2022 · RPM fluctuation, misfire and vibration at gear shift. Customer: 2014 Chevy Silverado 1500 LT 5. Your engine measures the amount of air coming into the engine using the MAF sensor, the MAP sensor, or both. About 1/4 mile in @25 mph, the truck started revving on its own. Its not as bad when the engine is hot but you can still see it surging. It is important to note that these conditions: Do not occur during vehicle launch from a stop. Anyone have any ideas? I hadn't seem "exactly" my problem from a google search but now my post brought up some posts about "Torque converter shudder". 3L L83 6. Dec 4, 2012 · sounds like the torque converter for your transmission is coming in and out. You’re experiencing engine surging in your 2019-21 Chevy Silverado, characterized by RPM fluctuations and power loss. Jul 10, 2018 · Thank you for the add, I am new and apologize if this is in the wrong place. It's like it's hunting or bouncing. Also i can hear in exhaust the note changes when rom fluctuates on idle, and whn going up is ok but when going down (needle) it viberates slightly like a surge or breathing. I'm attaching a video of the tachometer when it happens. It was the most noticeable when downshifting from 4th to 3rd so i believe something related to 3rd gear is what went south. Jan 20, 2018 · On my 2012 Avalanche with 5. Problem is the original transmission fluid would absorb moisture was what I have read. Jul 23, 2013 · Hope this is the right thread. Have a similar yet different problem with mine. Lately it has started going up and down in RPMs by itself when driving, but only when the engine is around 1600-1800 RPM. I noticed it the day I test drove it, but it cleared up almost immediately. Searched couldn't find anything that pertains to my question. Selecting M5 manual mode will make AFM inactive and the engine will stay in V8 mode. However, after doing so, I noticed that when the truck is in overdrive, only at low RPM and fairly heavy throttle, the RPM bounces up and down approximately 100RPM. If I let it sit until the rpm drops back down from a cold startup, it is not that bad. This does not seem normal to me Jul 16, 2018 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright May 28, 2017 · 2011 Ext. Transmission Problems. Gassed up and it ran perfect for 250 miles so. Jul 15, 2013 · Hey guys, my 2010 5. 3 with a rough idle it's worse sometimes than other it has 40,000 miles no codes. What she does is: the tach at light throttle will wiggle up and down about 100-200 rpm. My problem. lock up is around a 200-300 rpm change. Cab Z71 Silverado SOLD - 2016 CCSB Z71 Colorado SOLD - 2013 GMC Sierra 1500 SLT SOLD - 2008 Chevy Silverado 1500 LT Aug 3, 2019 · 2005-2009 Chevrolet Avalanche, Silverado, Silverado Classic, Suburban, Tahoe 2005-2009 GMC Sierra, Sierra Classic, Yukon Models Voltmeter Fluctuation Condition: Some customers may comment that the voltmeter is fluctuating between 12 and 14 volts on their full size pickup or utility vehicle. 8 L; it has a periodic RPM surge during acceleration (between 45-55 mph). Are there any other indications that the engine RPM is actually fluctuating? You could hook a scan tool up and peruse the live data while someone else drives. When it is revved up and held at any RPM it stumbles still, but is not as noticeable. I've actually had it drop completely to zero one time Jun 27, 2011 · I have recently purchased a 2011, 1500 extended cab, 5. Apr 9, 2019 · That would affect the fluctuating gauge and also the power train. Jan 4, 2016 · However, I have recently noticed an issue I'm having. . 8L 8cyl About 2 days ago I did an oil change on this truck and added 6 quarts of 5w-30 full synthetic oil. While accelerating from a low RPM range up to the speed-limit, my truck (2016, 5. 3. I've recently noticed while driving around 70mph on flat highway surfaces my RPMs will constantly fluctuate between 2k-3k RPMs. When I am driving usually I notice around the speeds of 50-60 mph my car revs up and you can watch the rpm's go up and down. I have a 2002 Trailblazer LTZ. Mar 26, 2017 · Similar oil pressure readings on my '13 5. There is not check engine lights on. I remote started my truck to let it warm up for a bit before I got into the truck. Dec 2, 2017 · Today was a colder and wetter morning than usual in my area. 1 2 3 I am having this issue on my 2012 Traverse with 197k, Going up #rpm #rpm_fluctuation #badrpm #symptoms #automobile #automotive 2015 Chevy Silverado voltage gauge Voltage gauge keeps dropping to low side after running for a while. I noticed my battery gauge needle is moving more than I have ever seen one move before. A bad brake switch can do this. I turn my tuner on and saw that the engine Was saying low oil pressure so I pulled over. Anyone else have this problem and or what should I be looking at for a cause. Apr 17, 2020 · On my 2012 Avalanche with 5. 3 L V-8. 2L L86 Subject: Shake Or Shudder On Acceleration Excessive Engine RPM Fluctuation Between 30 And 65 MPH Models: 2015 - 2016 Cadillac Escalade, Escalade ESV 2015 - 2016 Chevrolet Corvette, Silverado 2015 - 2016 GMC Sierra, Yukon, Yukon XL Equipped with 8L90 Automatic Transmission (RPOs M5U) and the 6. 2 GAT “Woe unto them that call evil good, and good evil; that put darkness for light, and light for darkness; that put bitter for sweet, and sweet for bitter!” Aug 19, 2018 · Hi all, I have a 2006 Yukon Denali XL. 5K views 1 reply 2 participants last post by sillyverado06 Jun 1, 2018 Mar 15, 2019 · 20515 posts · Joined 2012 20% and the idle would jump to around 900-1000 rpm. I check the oil and it seemed Jun 21, 2010 · I have noticed my 2010 5. 3 K5L - 2012 GMC Sierra SLT 6. May 31, 2018 · Have a 2012 Traverse LTZ with 108k miles. Replace the fuel filter if it is clogged or dirty. Can feel the viberation on steering wheel, May 19, 2010 · 2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Throttle body spacer, Spintech exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer AT3) and 4. See the video for what i mean. Whenever I am driving at about 45 miles an hour and let off the gas, when the truck starts to slow down, the RPMs Aug 27, 2021 · I didn't hear any engine surging, nor notice anything suggesting a power surge from the engine, and the tachometer behavior looks more fruity than realistic. 59,000 KM, automatic transmission, There are 2 seperate problems but they may be connected. Just my $0. Truck has 182k on it with a 145a alternator. This is normal. 3L 490k+ miles w/ GM Jun 3, 2023 · I just did an engine swap in my 2000 Silverado. Jul 31, 2013 · To diagnose if the random tachometer needle movement is caused by AFM transition, shift the transmission to manual mode (M), select 5th gear (M5) and drive the vehicle under the same conditions. 3 (LC9) has 174k on the clicker and I'm trying to sort out an annoying issue before it becomes a more serious problem. 2L L86 All Chevrolet Suburban 2015 - 2018 All All 5. When cold or on acceleration it goes to 350 kpa (50 psi). Jan 19, 2017 · So within the last couple months my 98 Silverado 2500 (350 Vortec) started having an intermittent issue after driving it throughout the day. 0L extended cab, cab&chassis flatbed, upgraded to 4wd 2012 Silverado 3500 dually, 6. 2 Z71 LTZ-Ski Doo's-FLHR-F3S Spyder-Boats Oct 19, 2023 · I have a surging idle all the time nearly / rough idle especially when first starting the vehicle after sitting a bit; while occurring Rpm's fluctuates between 500-800 mostly but sometimes however can reach 1000-1100 on the high end of of the rpm oscillation and from what I've noticed from times I paid close attention to it, after reaching the Feb 8, 2023 · A vacuum leak is one of the most common reasons for RPM fluctuations when your Chevy Silverado is in Park. Probably torque converter shudder. Now that my idle is around 550 rpm in gear, my idle oil pressure stays around 30 and 45-50+ with higher rpm. When Idle at a light drops to 200 kpa (29 psi). 3l with 215k miles. Could this be something Idle Air Control (IAC) Valve controls airflow at idle to maintain a steady RPM. 3L Mechanic's Assistant: Ok. When driving, slightly accerating, the truck is doing about 1100 rpm in its 6th gear. 2016 Silverado LT 4x4 Crew Cab / 2017 Suburban LT / 2008 BMW 328i Coupe / 2018 BMW K1600GTL May 28, 2021 · 2018 Chevrolet Silverado 1500 5. 8L that does not like to idle when its cold. Does not anything while driving it stays completely stable. 2014-2018 Chevrolet Silverado/GMC Sierra 1500 4. I put a new radiator and water pump when I did the swap. It reduces the engine’s power and affects its acceleration. 8L GMC Sierria 1500. Over the last year my oil pressure gauge has started to fluctuate randomly. Rpm is fluctuating when on idle, or stopped in gear. tbsef eew raqoe pcou loqvdre lpf pyoww gzstj ucpvpva xzbmr uchtvk jrtusc iablr mqwjg moixv