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Catera
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Discussion Starter #1
I just purchased a 99 catera from a private owner has 84000 miles on it. When i first got it home it had a engine misfire 300 302 303 304 ran rough sometimes stalling or pressing on the gas it would not go just backfires real bad also fluctuates in rpms. i changed coil packs and spark plugs nothing changed but misfire was now 300 301 303 305 then changed fuel filter still no change misfire is 300 302 303. Also is making loud ticking noise under passenger side valve cover. Has anyone experienced these problems or know any solutions?
 

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'92 Allante & '98 Catera
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It may be spark plug wires. I just purchased a '98 from an estate that had not been driven much in the past 3 years. Ran really rough at all speeds. I thought it was injectors or ? Took it to a trusted local mechanic and he found bad wires. He said he could see sparks in dark garage. These were really expensive (on the order of $600 for both sides). Now car runs great. May or may not be your problem.
 

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cartera
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I am having the same problems, It doesn't backfire, I pulled the injectors off and check them, one is not working. I also get a p1460 which is a misfire with low fuel. U may need to run a compression test, to make sure the vales are closing all the way. Then check timing belt, make sure it did not jump. Good luck
 
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