2001 Chevrolet Monte Carlo ignition

RICKSLICK714

MEMBER
2001 CHEVROLET MONTE CARLO
3.8L
V6
2WD
AUTOMATIC
63,000 MILES

Got the ignition module replaced and coils replaced so it is running good but my rpm is off by 500 rpm on my gauge. Is that good?

Wednesday, December 17th, 2014 AT 5:02 PM

5 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

What are you saying?

Is the idle speed actually too high or is the tachometer reading incorrectly?

Off from what?

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Thursday, December 18th, 2014 AT 2:55 AM

RICKSLICK714

MEMBER
3 POSTS

When you put in drive, it goes nearly zero on the rpm reading

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Thursday, December 18th, 2014 AT 5:25 AM

WRENCHTECH

MECHANIC
20,761 POSTS

Is it going too low and trying to stall?

If not, it's probably just an issue with the meter and I wouldn't worry about it.

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Thursday, December 18th, 2014 AT 11:11 AM

RICKSLICK714

MEMBER
3 POSTS

Yes rpm looks too low and no it did not stall at all. The rpm looks normal before my car quit running correctly and after they fixed the problem (ignition module replaced).

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Thursday, December 18th, 2014 AT 11:44 AM

WRENCHTECH

MECHANIC
20,761 POSTS

First eliminate all vacuum or air leaks in the system. You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.