Search Results for ‘idle’

Had a P0302 reading on my ‘02 4.2. Replaced #2 coil and all spark plugs. Plug in #2 was definitely darker but not wet. Reset computer. Now have P0300 and a more noticeable miss than I did before. Checked each cylinder by pulling coil connection for each cylinder individually. When I pulled...

Please please please help.!!!!! I need a electronic throttle controller for my 2003 Chevrolet trailblazer 4.2. the problem is is that the throttle position sensor on the Excelerator pedal were the Electronic throttle controller plugged into is different from any other year on the 2002 through...

My 2005 GMC Envoy has 171,000+ miles on it. After running for about 15min or so, when I'm at idle at a redlight my oil pressure drops, but if I put it in neutral and rev the engine it goes back up. I checked the oil level while warm and it was good. Most of my parts are in good shape as I've...

Hey guys this is my first post so please bear with me. I have a 2003 envoy SLT 4x4 and randomly it will start idling high at around 1,000 RMPS. Before when this happened it gave a code (dont remember what the code was) and the guy that scanned the code at advance auto parts said it was the...

I've bought an 05 Trailbalzer with the I6 in it knowing it had a few issues. i've fixed all the suspension issues and am now on the last leg of the engine. Currently it has a rough idle (i suspect a bad motor mount) to include starting the engine and shutting it off it just kinda clunks to a...

Hey there, I have been putting some serious blood, sweat, and tears, (and money ), yet I am still having the same or similar issues happening. Recent repairs: Fan clutch and water pump installed Tension pulley replaced. camshaft position sensor replaced. both oxygen sensors cleaned Throttle...

Ok, so I just got a 2005 Envoy 4.2L wth 140,000 miles on it. It had a rough idle so I cleaned the throttle body and it helped a bit. This morning the check meter light came on and i noticed that my oil pressure was going from half to a quarter back and forth. It was running pretty darn rough...

Hello everyone! I'm new here and if this is too many problems or I am posting wrong please let me know. I know nothing about cars, just so you know. But I am learning. I have very few tools handy. I have someone who has everything I would need though. I have a 2004 TB 4×4 1. I just replaced...

My wife's 2004, 4.2L, 223,000 mile, TB intermittently stalls at stops. When it stalls, she says it's as though she's turned the key off. There's no stumbling or roughness, it just stops running. It restarts instantly with no roughness. No DTCs (trouble codes) stored. This vehicle otherwise runs...

Hi I'm John and new to the site please forgive me if I have posted in the wrong area but I need help bad and have posted in other areas with no help please anyone that may know what I need to do please let me know thank you in advanced and GREAT site I have done/learned allot from here. I'm...

I have researched it up, and I've found several accounts of what it could be. The most common that seems to be popping up is the throttle body is dirty needs to be cleaned. But there is another one with a coil? I have attempted to research how to fix that, but I cannot find anything about it...

So I have a 2007 TB with about 113k miles, it has the I6 engine. I am very familiar with these engines as in the past I already have had an Envoy for many years and put over 175k miles on it. A few months a ago I started to get the cylinder 4 misfire code and I read about every forum on here...

Have thoroughly cleaned the throttle body and replaced the camshaft sensor, yet it still wants to stall out when braking to a stop or sitting at idle. Also wants to choke off on acceleration. It's not throwing off any code. Need help! This site has been great in the past, hope you can help again!

Hi everybody! This is my first post, so I hope I threw this in the right place. So I know there are already plenty of threads regarding this sort of thing... I changed my spark plugs, I used AC Delco 41-103 plugs, I made sure they were all gapped around .042, I used dielectric grease, I made...

Hello... I have an 04 GMC Envoy SLT. Its an I6 and just had the transmission rebuilt. It has around 116K miles, and the plugs were changed less than a year ago as well as a professional fuel system cleaning. They cleaned the coil packs but did not change any out. About 6 months ago, well...

Hey Everyone, I've done quite a bit of research on my idle/stall issue and so I want to see what I might have missed. Other than this frustrating idle issue the trail runs amazing; no loss of power when accelerating or driving with cruise control. I love this SUV; just want it to run right...

Hidee-Ho neighbors. I just purchased an '04 TB and I have noticed that at a certain rpm, I will have a rattling near the windshield down in the dash. I have come up with some theories, but to no avail. I have made sure everything is tightened down in the engine compartment, so I think there is...

My Envoy runs rough at idle and it is not consistent. The vehicle has 117k so I read and cleaned the throttle body by removing it and getting both sides. I also disconnected the battery while performing the work. When I come to a stop signal the idle is initially smooth and then moments later...

Hey guys I am new to this very informative site! anyway would like to see if any of you can help with my TB issue! My wife was driving today and she claimed that it started idling funny and then when came to a stop it idled up then died. Well I test drove it and everything was fine with a/c off...

As the subject says, yet another rough idle question... Vehicle: 05' TB I6 w/102K miles Problem: Intermittent rough idle. RPMs drop from 600 down to 400, then back up. Seems like TB is going to stall, but has to actually do so. Doesn't seem to matter if AC is on or off. CEL is NOT on (and...