Car runs like crap when warmed up

beansblacktsi · May 7, 2008

Okay so I have A 92 laser awd. The problem Im having is that my car runs like crap after it warms up. When I first start it it fires up right away and then Idles fine and doesn't smoke out the tailpipe but when the engine gets to normal running temp it starts smoking bad(gray white) wont idle and will die if I don't give it gas. There are no check engine lights. I did a boost leak test and its good, new plugs and wires. If anybody could help[ that would be great.
Thanks

jrohner · May 7, 2008

Do you have any kind of data logger? You could use that to see if there is a sensor that is showing the wrong value -- like the o2 sensor reads low, intake temp or water temp reads wrong, etc.

It could also be that the igniter or coil is going bad -- gets weak when it's hot under the hood.

Old Mitsu Tech · May 7, 2008

I would have the computer scanned for codes. It appears to be happening during closed loop. Which is when the computer takes over and it quits running on pre-set parameters.

Pull those and let us know what they are if any exist.
Good Luck

tbonitz301 · May 7, 2008

Sounds like a possible cracked head.Could be a headgasket also, but doubtful. I think if it was a headgasket it would more than likely do it all the time.

beansblacktsi · May 7, 2008

okay I can get a data logger tomorrow and I will check that. Im pretty sure its not the head gasket because my compression is about the same all the way across. Thanks guys

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Car runs like crap when warmed up

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