Mechanics

CAR HESITATION

2005 Pontiac Sunfire

Engine Performance problem
2005 Pontiac Sunfire 4 cyl Front Wheel Drive Automatic 70000 miles

I had trouble starting my car this morning and after a minute and a half it started. Its never done that. When it did start
it hesitates and misses bad and has no acceleration power, like it will only go about 10 to 15 mph. Also there is a hissing
sound somewhere in the engine, kind of sounds like air is escaping or something. There is also a gas smell under the hood.
I got some opinions and one person said clogged caddilac converter, one person said loose spark plug, and one said vacume air leak.
Just wondering if you have a opinion. I dont think it is a blown head gasket or a cracked head because it never overheated and I had it runnin for an hour and a half.
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Bradkeeton22
April 17, 2010.



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