1999 Buick Lesabre won't run unless it's at Super high idle

BLONDIEBEEGIRL

MEMBER
1999 BUICK LESABRE
6 CYL
FWD
AUTOMATIC
180,000 MILES

I went to start it and it cranked, but would not fire. I decided what the heck and put the accelerator all the down. It fired, but would not stay running when I took my foot off. After a few tries, the car made a slight puff noise. Now it will run, but I'm sure this will happen again. Someone mentioned fuel pump, fuel filter or some GPR(?) Valve.

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Hi blondiebeegirl, Welcome to 2carpros and TY for the donation

Check the fuel pressure if its within specs if okay Clean out the idle air control valve and EGR and PCV valves then test the throttle positon and manifold absolute pressure sensors

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Saturday, March 13th, 2010 AT 1:16 PM

AMRAAM35

MEMBER
39 POSTS

Sounds like you may abe running too lean. Any engine codes? This could be caused by a problem with fuel system as descirbed in the other post, or it could be caused by too much air entering the system. Check the intake and vaccum system for leaks. Check to make sure you are getting a spark at all your plugs.

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Sunday, March 14th, 2010 AT 3:15 PM