Search Results for ‘rough idle’

Hello! I'm new here. I've searched the forums for my issue but haven't had any luck. So, here's my issue... When I fire it up, SOMETIMES, not all the time, the rpms fluctuate. It jumps back n forth between roughly 300-1000rpm. A few times it has even just died on me. If I give it a little gas...

I've been fighting my 2005 trailblazer, No matter what the conditions are every time you go to start it gets stuck into security, after waiting 10 min with the key in the ignition it resets it just fine then proceeds to have a very rough start. Any tips to disable the security entirely? or just...

I'm having a problem where when I give it gas from a stop the car car almost stall, this also happen when I rev in park pr neutral. When I give ot gas the rpm drops to about 500 then revs up. It has stalled a few times. Any suggestions?

I have a 2004 gmc envoy and it has a slight rough idle and almost stalls sometimes, also it has low power at about 2000 to 3000 rpms. I have changed spark plugs and cleaned the throttle body. Any suggestions to fix?

First time post but long time reader. This site has been a lifesaver for me many times but I have one I can't find the help for. I've had my 03 Envoy for almost 10 years, has over 200,000 miles, and still love this car. I changed the ECT sensor yesterday which is the most pain in the neck...

So my 05 Trailblazer began running rough a couple days ago.It was slightly choppy sounding with a misfire also.I bought a scanner and pulled codes earlier tonight.Two map sensor codes were present,but Im almost 100% sure they're from 3 months ago when I had Autozone pull codes which lead me too...

Hi everyone, I'm new here. Please bare with me. I bought a 2006 Trailblazer 4.2 LS 2WD in January of this year. I LOVE my car. That being said, I've ran into some problems in the last couple months. First month of having it, it ran like a champ and then one morning, I turned it on and it was...

I've been troubleshooting my 2005 Trailblazer 4.2 I6 Low Beam issue. Great threads by the way! Long story short. I have no Battery 12V to pin 2 on the HDM. If I run battery 12V to pin 4 I still have no low beams. However, if I run 12V to either low beam fuses I get low beams on left and right...

Hi everyone, Before I get to my problem here is a little background info on the vehicle. It is a 2006 Trailblazer 4.2 LT2 with 200,000 miles. I have owned the vehicle for 9 years and up until recently I have never had a problem. I stayed up to date on all regular and recommended maintenance. No...

Hello all, I've had the great honor of being stuck with rough idle issue. There is a multitude of issues I'm getting at one time and I believe they're all related. At stop lights I will stop then my tach shows the rpms drop down to 500 or 450, shake a little bit, then jump immediately back up to...

NOT SOLVED rough idle, horrible noise on hard acceleration (especially 1-2 upshift) in my 2006 Trailblazer. No RPM's bouncing, but it will die at stoplights and such. The noise on hard acceleration is unbelievable. Kinda sounded like ball bearings rattling around an empty coffee can, but not as...

About a month ago we got a check engine light and very rough idle. The code indicated misfire on cylinder 4. I replaced the spark plugs and cleaned the throttle body, but that didn't help at all. I then replaced coil pack # 4 and it worked fine. I cleared the code and it didn't come back. A few...

All, I need some input and specifically regarding the intake manifold. I have a 2003 Trailblazer with the 4.2. It's 2 wheel drive. I've had a bit of an engine idle problem and I did recently buy the car used (less than 8 months ago). It isn't anything major, but sitting at a light the idle...

Hi guys finally decided to make a post about problems I've been having. My trailblazer has had a rough sometimes sporadic idle for some time now and just recently a p0014 code popped up. So I did what everyone says to do, cleaned the throttle body, put a full can of seafood at fuel up, changed...

TL;DR: All of my coolant leaked rapidly from the system. Refilled with water to test, none leaked out after driving ~5 miles to a safer parking lot. ------ Story: I bought my 2004 Trailblazer LS (4.2L I6) about a month ago. It has 83k miles on it, but I've had some problems ever since. It...

Just a little post to let some folks know that a nasty rough idle and noisy acceleration (especially 1-2 upshift) in my 2004 Trailblazer was actually caused by a faulty water pump!!?!. I never lost any anti-freeze, but could always smell it, I only noticed a rough bouncy idle, not RPM's...

I got an 02 Envoy a few months ago. 140k miles on it. as usual right after there awesome 1 month warranty (sarcasm) expires problems arise. 3 coils replaced, i replaced all the spark plugs with cheap autolites. (im broke as a joke) the engine knocks shortly after i got it. It all went down hill...

Hey guys, I have been scouring this site for a couple weeks now trying to find a solution. First off, I have 99k miles on my 05 TB. Let me give you a walk through with my issue: Vehicle was running great, but I was approaching 100k miles so I decided to swap the spark plugs with the AC-Delco...