Questions & Answers for: rough start trailblazer

rough. Could be a throttle posistioning sensor. pcv valve, dirty fuel filter, worn spark plugs and wires, possible O2 sensor. If the vehicle has not had a tune up yet, I would recomend one. Even if it

...rough when stopped ever since i had someone change my oil I would start by checking the oil level. See where it is at. Did you have the oil changed by a reputable oil change place or dealership? Let ...

...ROUGH Have the codes read, that's the best place to start. I am going to suspect there is a piece of trash in the EGR valve. I've had that happen before on a 4.3L Astro many years ago. Symptoms were ...

...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

...Trailblazer idles rough with the AC or defrost on when stopped. It rides fine while the car is moving. I changed my battery a couple of months ago and then the problem started. Thanks for your help I ...

Trailblazer idles rough. Idles ok when started up, but after warmed up it idles really rough when stopped. If it has not pulled any codes (idiot light). Clean your throttle body, and change your spark

start idling rough while you had the defroster on, or the A/C? This is a very common problem after the battery is disconnected AND the defroster or the A/C is on. The defroster uses the A/C to dry the

...Trailblazer suddenly started running rough and stalling, It smelled like fireworks. I changed the spark plugs but still the same. 1st things first, clean your throttle body.  Also, that smell is ...

...Trailblazer rough idling I'm getting a P1345 (cam/crank sensor) code. I've replaced the cam sensor and spark plugs. It starts fine and runs fine when you're up to speed but it ...

...let cool and will start but run rough code 0300, new plugs, coil pk, map sensor, cam sensor, and 55lb fuel pressure The basics for rough idle, check for a leak of some kind, fuel--egr--vacuum