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2002 Chevy Cavalier engine cut out at highway speed, would not restart, have fuel pressure, compression in each cylinder checks out, have an orange spark coming from all 4 spark plugs
This morning when I went to start my Cavalier it wouldn't start until about the 5th try. Then after getting it moving it sputtered and wouldn't go over about 35 mph. The idle kept going up and down and it didn't feel like it was going to take off after stopping. The acceleration was very slow after it did start to go. I did get it to drive about 10 miles, but haven't moved it since. Spark plugs??This morning when I went to start my Cavalier it wouldn't start until about the 5th try. Then after getting it moving it sputtered and wouldn't go over about 35 mph. The idle kept going up and down and it didn't feel like it was going to take off after stopping. The acceleration was very slow after it did start to go. I did get it to drive about 10 miles, but haven't moved it since. Spark plugs??
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Did you visually check for spark on that cylinder, engine cranking? A misfire can be caused by just about anything, fuel--spark--compression.
The make is a chevy, what is the model?
Can you feel the misfire? At idle or highway speed, both
sounds like you have checked a lot of things if it was mine I would do new intake gaskets, I had a 2002 Sonoma I did a lot of what you did and every time I gave it back to owner a few days later lite was on and p0300 I did intake gaskets and its been good 2 yrs now,not sure what gaskets you got but gm use plastic ones I got new gm ones and they were aluminum type call gm dealer parts good luck
is there any check engine lights on? also a leak in the vacuum lines will make it jump in and out of over drive. could be a few problems. wish i could help more, sorry. if you have a vacuum leak it would also make you heater controls not work like they should, like if you put it on defrost it will only come out the vents and so on.
You may want to check for fuel volume and fuel quality. There may be moisture in the fuel. It would also help to know which cylinders it is misfiring on. Scan tool will show the misfire on live data.
CHECK FUEL INJECTOR WIRING TO NUMBER 4 INJECTOR,HOOK A TEST LIGHT TO MAKE SURE IT BLINKS WHILE ENGINE RUNNING.THAT WAY YOU WILL KNOW IF PCM FIRING THE FUEL INJECTOR OR FAULT AT THE INJECTOR WIRING OR YOU HAVE INTAKE LEAK LOW COMPRESSION TO THAT CYLINDER BECAUSE OF BAD BURNED OUT VALVE.COMPRESSION TEST TO THAT CYLINDER CAN ALSO HELP.LOOK FOR LOOSE OR WORN DAMAGE ROCKER ARMS IF YOU HAVE A SOHC SINGLE OVER HEAD CAM ENGINE.
back to basics, does the engine turn over, if so check spark(in line tester works best) fuel pressure(with a guage) injector signal(noid light), then go on to compression,
car turns over but wont fire
This morning when I went to start my Cavalier it wouldn't start until about the 5th try. Then after getting it moving it sputtered and wouldn't go over about 35 mph. The idle kept going up and down and it didn't feel like it was going to take off after stopping. The acceleration was very slow after it did start to go. I did get it to drive about 10 miles, but haven't moved it since. Spark plugs??
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