1993 Chevy Lumina alternator idling trouble

CHEVYCOUNTRY70

MEMBER
1993 CHEVROLET LUMINA

Other Category problem
1993 Chevy Lumina V6 Front Wheel Drive Automatic 75,000 miles

I just had my alternator rebuilt, drove car about 20 miles and let it idle for about 10mins waiting on my wife to get off work. We then drove to gas station and put in 3/4 tank of gas in. When I went to drive off car died and started right back up went 25 yards and car stalled again. Drove another 3 miles got to red light car stalled again and the hand on the tack was idling up and down, idle up to about a grand and half then drop below 1 grand and stalls out. The hand on voltage meter was moving up and down. When your driving no problems at all just went your at an idle got home shut car off and started it right back up and the tack went to 2 grand then dropped below 1 grand then idled out to 1 grand but then started idling up and down voltage meter jumping up and down please help. Thank you

1 Reply

BLACKOP555

MECHANIC
10,371 POSTS

First check your egr valve to make sure it is not carbon fouled and plugged open, next check the PCV valve by shaking it, if it rattles its good, if not repalce. Also check the rubber elbo and the hose on it to the air box for cracks.

Next take off hte air intake hoses from the throttle body open up the throttle and clean out the throttle body. Then disconnect and remove the IAC and make sure hte pintle moves freely and the IAC module and housing is not scorred. If it is replace it.