Questions & Answers for: 2004 trailblazer runs rough

...2004 Trailblazer has 102K miles on it and has been running rough. I have run several tanks of fuel injector cleaner with no help. Changed spark plugs this weekend and found oil in #'s 2, 4, and 6. ...

I changed spark plugs on my 2004 trailblazer but now it runs rough maybe missing one. Could the boots be bad did you gap the spark plugs? Check all the boots and grease them with coil boot grease!!

2004 CHEVY TRAILBLAZER 4.2 LTR CHANGED PLUGS, COIL PACKS ARE GOOD, GOOD AIR FILTER, RUNS SMOOTH AT IDLE, BUT WHEN PUT INTO DRIVE RUNS ROUGH, AND STARTS TO STALL OUT HELP PLS Throttle body needs to be ...

2004 Trailblazer run rough at stops and AC is on? Doesn't stall and temp. is fine. Also idle gage seems fine. It also sputters when shutting engine off. Just had the motor mounts replaced 2 months

trailblazer is running rough so i changed the plugs and it is still rough. like it is missing or a fuel injector is clogged. The fuel mileage is also suffering. But there is no code for a problem best

engine light flashing running rough The service engine soon light blinks while accelerating and goes off after stopped, but it idles rough also Read the fault codes and replace faulty units. has a ...

2004 trailblazer, after getting gas,check gages lite came on, then turned off. truck running rough and after going over 40 miles per hr, service engine lite flashes. Sounds like there was water in the

...2004 chevy trailblazer with 4.3 v6,and it started to run rough like its missing. how do i figure out if its the injectors or the coil pack and wich one this used to only happen if the ac or defrost ...

...2004 trailblazer is now running rough and hot. I found a light green 2 pin connector that is not connected to anything and hope to identify the sensor and its location. thank you for your help in ...

2004 trailblazer stalls and runs rough after warmup is at nornal temp, let cool and will start but run rough code 0300, new plugs, coil pk, map sensor, cam sensor, and 55lb fuel pressure The basics ...