1999 alero hard starting when engine is warm

08-19-2011, 10:15 PM
hi everybody I need some help please my 99 alero runs ecxellent but when the engine is warm and I shut the car down and restart it is harder to start have to use accelerator to get it going not sure what the problem would be

2000 olds premeire
08-21-2011, 10:33 AM
im having similar problems out of my silhouette.its looking like o2 sensors on mine,and possibly catalytic converter.I put the downstream sensor in last night,seems a lil better,but still havent got all the bugs out of it yet.prolly gonna have to get the upstream sensor too!is your engine light on?if so,get it scanned by your local parts store and go from there.thats how i found part of my problem...hope this helps a little,as im going through the same thing on mine when i try to warm start it.acts like its outta gas or not firing...

Tech II
08-24-2011, 04:22 PM
Possible coolant sensor.....also check vac line to fuel pressure regulator for presence of fuel......

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