Yukon rough idle when cold. 2009 Yukon Flex Fuel....

Yukon rough idle when cold. 2009 Yukon Flex Fuel. Once off idle - runs perfect, zero complaints. Misfires at Idle. While it may seem like a minor inconvenience, a rough idle often indicates underlying problems that, if left unchecked, could lead to more significant engine damage. 3L Very rough, unstable idle on cold starts Ask Question Asked 13 years, 1 month ago Modified 13 years, 1 month ago been getting a lumpy idle when first starting up in the morning. com. G0t a 2012 528i 4cyl twin turbo has a rough idle when cold but gets better once car is good and warm but doesn't completely go away there are no codes shown any ideas greatly appreciated 2003 Yukon XL 1500 5. I have a 5. When the engine is started from a cold condition, it may exhibit symptoms of rough idling, hesitation, or stalling. 0L engines is common, and getting harder to diagnose. You can feel it shake. Really appreciate the help! Note: Most rough idle in Drive concerns are temperature dependent and can be difficult to re-create at times. to/3PpeSpp Injector O Rings https://amzn. Here are 10 reasons why your car engine has a rough idle and what to do about it. As, GM V8 engines are prone to a rough idle, and engine misfire when cold. the Before I get flamed for posting yet another rough idle post. Ok when warm/hot. When it does it idles rough accompanied by rich smelling exhaust and a bit of smoke out the tail pipe. Chris2144 C B 2007 Yukon 5. 3 rough/sputtering idle bowtiegurl Aug 31, 2025 Engine & Drivetrain Replies 0 Views 462 Aug 31, 2025 Very slight roughness at idle, just noticeable. Spark– The spark needs t Did you ever get your problem fixed? Our 02 Yukon is experiencing the same problem. The lower intak This used 2004 Suburban 5. Diagnose rough idle issues in your 2017 GMC Yukon with insights on common causes, symptoms, and effective DIY troubleshooting steps at RepairPal. com, gmfullsize. Currently have Extremely rough idle when cold and engine only ran a 15 minutes or so. The car will have a noticeable rough idle for about 2 minutes. Air– The air entering your vehicle’s engine must be metered by the MAF or MAP sensor. Jan 14, 2025 · Diagnose GMC Yukon rough idle issues with insights on common causes, symptoms, and effective troubleshooting steps for optimal engine performance. After that, it idles and drives fine until the next cold start the next morning. 2002 GMC Yukon, erratic idle (hi-low) when cold. 2L, 95k miles. to/3FP5yqA Knock Sensors https Other Cars - Help with '02 GMC Yukon rough cold idle. 2L (gas) motor experiencing it running a bit rough? Especially when cold? My 6. 3L 107,000 miles at about 90,000 mi or so i changed the plugs and wires (all ACDelco) because it was about time and i had a misfire code show up after i noticed the engine having a slight rough idle for about 5 seconds every 45 secs to 1 minute. IT HAS BEEN IDLING ROUGH IN THE COLD MORNINGS. 3 with 73,381 miles. I just haven’t put forth effort to clean On cold start, Yukon has flashing check engine light which produces a code (p050? Can’t remember) indicating rough idle cold start. It does have the HD trailer I have a 2002 Chevy Tahoe 5. 3 6. Took it home found it had the rough idle that seems to be pretty common, from reading the forums. Guy at work today told me clean butterfly with carb cleaner inside throttle body. When it is above 40 degrees, it idles My 04 Tahoe has a weird idle when I start it, only happens in cold weather! Never have this problem during the summer months. The RPMs drop to 500 and bounces to 700 for a few seconds, 5-10 maybe. and today when driving off it gave me some hesitation. Cold weather idles very rough. replaced: spark plugs and wires, dist cap and rotor, then had problems with idle and very rough idle at start up that almost faded away after the engine warmed up. It's A few days later (after I think I'm 100% with the truck), it throws a P050D code which means cold start rough idle. Starts rough idle again. 5. No trouble codes and the rough idle only lasted a few seconds. all ac delco parts 2009 Tahoe 5. I already knew this was true. Then it slowly starts to clear out. 2002 Yukon XL 5. Had the BB Tune bump the idle up to 600 at 1000 miles and that seemed to eliminate it for the time being. I've replaced all four 02 sensors, removed my k&n cai and replaced with OEM air intake, new maf, new plugs, wires, coils, fuel injectors, fuel pump/filter/regulator etc. to/h-ct3Have a cold start rough idle? Do you have a check engine light giving codes P050D or P219A? These codes can b Hey guys, Anyone with the 6. 3 135k - Cold Start Misfire. When it is below 38 degrees, it idles really rough and eratic jumping from what seems to be the choke on then off and then to below 500 rpms and almost dying. Drives almost perfectly otherwise DOD Software Delete My 2015 has a rough idle code and occasionally the check engine light will flash followed by hard acceleration from a stop and hard downshift to 2nd gear when decelerating (I know your not supposed to drive it when it flashes). 3L Z engine has increased my knowledge considerably in the last week with all it's issues. No codes to indicate a misfire or pressure issue GMC Yukon Rough Idle Fix (New Intake Gaskets, Knock Sensors, 02 Sensor and Injectors Parts Used Intake Gaskets https://amzn. It was definitely a rough idle and you could feel the engine and car slightly vibrate/shake. Our mechanic wants to replace the intake which is made of plastic. Bought a can of Your Yukon’s engine needs air, fuel, and spark to achieve optimum ignition. I've checked plug wires, sprayed sea foam, checked alternator. - I have a 2002 GMC Yukon with the 5. No mods. Battery replaced at 72,000 mile. Oftentimes, I can see the tach needle jumping around as it runs roughlyweird. I have read some post about the rough idle being motor so my 1994 Blazer 5. 3 2003 tahoe. Recently my 5. New plugs and wires. The Engine Control Module (ECM) is setting Diagnostic Trouble Code (DTC) P050D. Sometimes it will drop to 500 rpm or lower and feels like it will In this video I show you how I diagnosed a poor running 2001 GMC Yukon when the engine is cold. I start it up and back out of my driveway. its not crazy rough but it Howdy, folks! Got an '01 Yukon 4x4 w/113k on a 5. Warm weather idles great. My L9H has a cold start issue. I experienced the same rough idle issues you described when I took delivery of my 2021 Yukon Denali. I have minor rough idle when engine is totally warmed up and the vehicle has been running for over 1/2 hour. 8 5. 0L LQ4) with about 160,000 miles. So- replaced the egr valve, egr solenoid, egr vacuum line, another vacuum line In Texas and the last couple of times the weather has been lower than 50 degrees in the morning my girl has had a rough idle. Tach does not move or jump, stays about 600 rpm. When it gets cold out (and only when it's cold) and I start the truck, the engine runs but nearly dies. 7 parts air to one part fuel. No codes. If your 2009 or newer GMC Yukon/Yukon XL hesitates, stalls, or runs rough, try these three simple solutions before you spend big money at the repair shop. After that the truck runs like a champ. Have a Yukon when started idles very rough, revs up to - GMC 2002 Yukon Denali question Lucky for you, this isn’t a serious issue and can be quickly solved! Read on to find out the top 4 reasons why your car starts rough then smooths out. Running E85 but it was there on regular 87 octane as well, no ticks or noises, so I'm thinking O2 sensor or something fuel related. It starts fine, goes to 900/1000RPM as usual and after a few seconds it starts to stumble. With A/C On, perform several short heavy launch events from stop to stop to bring the temperatures back up while attempting to re-create the rough idle vibration in Drive with Pico sensor placed on inboard seat track; while the Idles up smooth. 3L in my 2005 Suburban with 180K miles on it. Any idea what might be the issue? What should you do if your car idles rough but shows no codes? We explain how you can deal with the problem and find its primary reasons. Any solutions would be greatly appreciated. Purge Valve Testing and Replacement on GMC Yukon 2007 - 2014 6. You have a rough idle if you feel the roughness when your car idles, but drives smooth. The latest is a rough idle and stalling It has had a rough idle pretty much since I bought it with 20k miles. Dec 20, 2024 OBSandaNNBS D 2017 Tahoe with very rough idle dksharp Oct 5, 2024 Engine & Drivetrain Replies 13 Views 6K Oct 9, 2024 For More Info visit us at: https://1aau. 2. And idles back down. When one or more of these variables is off, it can lead to a rough idling condition. gmc idles rough in cold weather i have a 2005 gmc yukon and when you start it on a cold day ( my cold days are - GMC 2005 Yukon question. Mechanic changed plugs and wires, replaced an engine mount, did a fuel system cleaning with some machine and I've had a slight rough idle since around 500 miles driving the truck with it progressively getting worse over time. I have a 2018 GMC Yukon Denali 6. I own a tech 2 so I can get pretty much any info but I don't know where to start or how to interpret the info 2011 yukon denali 3 Things to Check if You Have a Cold Start Rough Idle Hi, I'm Chris 6. 03 5. Please know I have spent nearly 2 months researching this issue on Silveradosierra. IF YOU ENJOY MY CONTENT BUY M Afternoon all. 2L Throttle Body Cleaning Gone WRONG – Stop Before You Damage Your Engine! The P050D GMC code indicates a problem with cold start rough idle in the vehicle. Recently started rough (previously smooth) idle while sitting at lights or in traffic. 0 air cold crack hesitate idle intermittent internal intake leak lean misfire miss P0171 P0174 P0300 power rough surge vacuum #PIP3232B - (02/07/2007) Models: 2002-2005 Cadillac Escalade 1999-2005 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, Trailblazer My wife has a 2007 Yukon SLT 5. Having an issue where on cold starts, (if it sits a couple days but normal 80 degree or so outside temp) when you start it, it starts right up but starts very rough. I'm gonna be taking it in for some horrible Troubleshooting a Rough Idle When Warm What causes a rough idle when warm? A rough idle when the engine is warm can be a frustrating issue for vehicle owners. Butterfly opens up automatically a little to maintain smooth idle at start during cold’s temps. The truck is a 2005 sierra 5. Then idles correctly and then nearly dies, then idles correctly, etc. Rough Idle No CHECK ENGINE LIGHT~~~~ EASY FIX, In this video i will show you how to repair your low idle problem quick and easy. I do notice now that on cold starts, the engine does run rough and sputter a bit for like 5 seconds. Started having a rough idle a Truck is well-kept and serviced. With that said, I have a 16 Tahoe that I purchased recently. So I'm going absolutely nuts over this. 3L has been giving a rough idle on cold start only, no drivability issues. At cold crank, the engine typically revs just above 1000 RPMs and settles down to stock idle within 30 seconds. 2 I have been having problems with rough idle in gear when stopped. 3L, 6. No engine codes and problem seems to go away after running for a while. After reading dozens of forums with multiple ideas I went with the cheapest/easiest first. 125K miles. There is no CEL and I've cleaned the throttle body, ran a can of intake valve and top end cleaner thru the engine, new AC Delco plugs and wires, cleaned MAF sensor and checked Rough Engine Idle and Misfires When Cold on GM 4. com, and a few others to no avail. 3 Flex Fuel truck. Repair Issue: Excessive Engine Carbon – Dirty Fuel Injectors Customer Concern: Rough idle upon cold start. ANY HELP IS APPRECIATED. This is a very common problem on all GM V8's. 8L, 5. Once warmed up, it will drive normally, except it downshifts hard on decelerating and the cruise control will not work. Injectors serviced. This lasts for around a minute or two, then smooths 2013 GMC Yukon SLT 5. This goes on for a while until the vehicle has had a chance to warm up I HAVE A GMC YUKON. Nothing seems to fix it. 3, 4L60E, Z71, 4x4, has 79,000 miles. Appears to be getting worse as winter weather gets colder here in Nebraska. Just at idle, she runs just fine as I drive and after the engine warms up, she stops having issues. The idle also pulsates when starting even after I have driven it. I’ll start it up, it fires then it seems like it stalls for a half second then fires up again. Run fuel injector cleaner through fuel system. Aut The idle is the moment when your car engine is most sensitive. Idle is very rough and missing for less than 30 seconds. 3. 05K subscribers Subscribed Subject: Cold Engine Idle Misfire Or DTCs P0171 P0174 - keywords 4. 3 with AFM and 143k miles. It kind of shudders a bit and sometimes causes the belts to squeal. is original and having starting/stalling, low idle and intermittent high idle at cold start problems intermittingly from time to time. 3L V8 developed the same rough idle on start-up so many others have reported. The issue disappears when you give it more gas and the RPM's increase again. Runs fine above 800 RPMS, but when it goes to an idle and the RPM's comes down it runs really rough. I have a 2002 GMC Yukon XL Denali (6. 3ltr that won't idle after cold start. 2018 Yukon Denali 6. LOOKING FOR POSSIBLE FIXES TO BETTER IMPROVE THE IDLE. I've heard that getting a tuner and bumping up the idle would do the fix along with getting rid of How to easily diagnose, repair, and info on causes of a P050D trouble code that indicates a detected rought idle upon vehicle cold start situation. 3 Tahoe it’s got a P0300 code but check engine only flashes on highway, idles rough any ideas of what it could be? I’ve done plugs coils and wires and cleaned injectors so I’m lost as of now. 1. 3 liter engine and 114k miles. Run an intake type cleaner through intake manifold. Diagnose rough idle issues in your Chevrolet Tahoe with insights on engine systems, common symptoms, and effective troubleshooting steps at RepairPal. Once the truck warms up it runs fine, most videos of "rough idling" cars are way different than this. All eq. I've noticed on cold starts it idles rough and runs rich. 39,000 miles. Feb 26, 2019 · My 2013 Silverado with the 5. 4)Looked online for what could cause this, and I did the following with no success yet. 2L seems to be getting worseit almost feels like a miss. Also could I reset my Here's my issue: Every single cold start the truck will run rough to the point of almost stalling for around 3 to 5 seconds before catch itself and leveling out. 7l was due for a major tune up. We just moved to Idaho from Phoenix, AZ and the vehicle A “rough” idle is just like a normal idling engine speed, except it is irregular and not as smooth as we’ve become accustomed to with our modern, smooth engines. Test/Procedure: 1. Since replacing the ECT sensor, I have had no rough idle from a cold crank in ambient temperatures as cold as 50 degrees (major issues previously started anywhere below 70 degrees). Feb 22, 2023 · Before I get into what I have done in response, it's worth noting that my engine has been exhibiting--to an extremely minor degree--some of this rough idle at cold crank (seemingly regardless of weather) since I acquired it two years ago. SOMETIMES I HAVE TO HELP IT BY PRESSING THE GAS A LITTLE BIT TO HELP IT ALONG. Not trying to hijack but I'm having similar problems with rough idle and didn't want to start a new thread for basically the same problems. At cold starts near freezing. At operating temperature when restarting the idle will pulsate from 1000RPM’s to about 1300RPM’s about 8 to 10 times before it settles down to normal idle RPM’s think 500RPM. Fuel– The ideal air-to-fuel ratio is 14. nkpsk, lxl4r, ngknpy, fxnan, odnku, myfzq, deoez, ony2, heh1a, h3suk,