V6 IDLES ROUGH AT FIRST & BACKFIRES UNTIL WARM

1985 Pontiac Fiero

Tiny

Packerfan1

August, 5, 2012 AT 7:14 PM

When first started it idles a little rough but not bad. Stays running. It will backfire 3 or 4 times when getting on it for the first couple miles. After that idles & runs fine. Lacks a little power when getting on it at the end of each shift. Replaced plugs, wires, cap, PCV & rotor @ 89,000. Problem just started a month ago. Any ideas?

FOUND 4487 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

1 Answer

Tiny

ASEMaster6371

August, 5, 2012 AT 7:33 PM

Could be running lean, the coolant sensor could be bad, could be injectors. A shop with a scan tool can monitor the sensors to see which one is out of parameters.

Roy

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