Question about 1999 Pontiac Sunfire
Diving away form stop and engine will stumble and stal.engine will start after 5 to 10 min and drive fine until porb starts again.
Posted on Feb 25, 2009
Ive seen fault crank positon sensor cause this also clogged injectors cause this ,for sake of saving money try some chevron techron injecttor cleaner but if u end up having take this car in i would go to the dealer cause all places charge the same 4 labor n lot small shops cause more damage than they fix
Posted on Jun 22, 2008
SOURCE: Car stalls right after starting
check all vacuum lines and also check to see if there is any leaks around the intake manifold and check the fuel pressure and check for any loose or damaged wires to the coil packs and the alternator
Posted on Mar 20, 2009
SOURCE: car can stall in warm weather
Most likely if it is temperature related you may have a temperature sensor that is failing. The sensor may not be reacting properly to the actual temperature and causing the engine to run rich in warmer weather when a richer setting is not required.
You could have a sticking injector or sticking EGR valve or a faulty TPS switch, all can cause a rich condition and a poor running engine.
Is the service engine light on or come on at some point?
I would start by having the car scanned for trouble codes. You can have the scanned at no cost to you at your local Auto Zone or Advance Auto Parts. Write the codes down and respond back.
Posted on Sep 19, 2009
Testimonial: "Hi I unplugged the heat sensor and it stopped doing the problem so thanks for the great input thumbs up for u...."
Purchased a new gray Standyne Fuel Solenoid Driver kit with heat sink and extended wire harness. Mounted on left fender well and was able to do the work myself in about an hour. No need for injector pump work. Solved stalling issues and it starts up easier as well. These are all over ebay. Very common issue with this engine, and the GMC knuckleheads knew about it and didn't do anything to educate dealerships on a permanant fix.
Posted on Aug 05, 2011
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