ENGINE RUNS ROUGH AT COLD STARTUP AND STALLS MOST OF THE TIME MAF SENSOR IS ALL OVER THE PLACE UP AND DOWN.

1996 Buick Regal

Tiny

Firemnted

June, 14, 2012 AT 3:16 AM

1900 miles on the Original rebuilt engine (my dad was an ASE Mechanic for 35 years but got out of the business in 1996

I have already replaced the TPS, Temp, MAP, MAF, upstream o2 sensor.

Plugs and wires are new I have cleaned the grounds on the bell-housing I do see a ground with a 16-18 Ga. Wire by the battery tray on the inner fender well that the bolt is so rusted I haven't had the time to remove and clean it! (Could this be the problem)

FOUND 4553 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

3 Answers

Tiny

Jacobandnickolas

June, 14, 2012 AT 3:43 AM

Check the IAC and check for vacuum leaks.

Tiny

Firemnted

June, 14, 2012 AT 4:04 AM

I have suspected the IAC but it has about 6 pins and I cant find anything on how to test it! No vacuum leaks! I forgot to add if I hold the throttle at 2000 RPM's and slowly reduce the RPM's the MAF sensor is stable at Idle!

Tiny

Firemnted

June, 14, 2012 AT 4:07 AM

I'm getting my readings from a scanner!

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