Running rich 3.1 grand am

PONTIAC GRAND AM
Avatar
BOBBY71
  • MEMBER
  • 13 POSTS
I have a 94 grand and it is runnnig rich . 112000 miles did a full tune up plugs wires,02 sensor. Cleaned the trotlle body. changed the coolant and thermoasat .The car was sitting for 3 years .Just bought it So fresh gas and fuel filter. Car wont idle right sems to serge and has a hesatation when pulling off. Put my scanner on her and no codes .But I see that the coolant temp senor is closed and never opens up even fully warmed up. Does any one think I damaged it when flushing the system out. , Maybe it got air bound and baked it. It is orginal . Seems like the computer is fight it self to lean out but then stalls. Before I did the tune up it ran great start right up touch the key. I even swap a tps from the bone yard still runs bad . thanks bb





B
Dec 12, 2006 at 7:38 AM
Advertisement
Avatar
BOBBY71
  • MEMBER
  • 13 POSTS
Well I did what you saids and it was fine .5 volts . put car back on scanner. Things just didnt add up. 15 a/f ratio . Still smells rich. I said f it went back to basics and put that brand new scanner in the box and pulled out my vacum gauge and found thatI had super low vacum witch i alway suspected motor didnt reallly respond to any idle change removing vacum plug ect, the 1 egr selinod was stuck open . Scanner said off. I new no codes its mechanical .
Thans for your help Bobby
Dec 14, 2006 at 10:50 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle