Question about 1999 Dodge Ram

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Check engine light

Hooked up computer to truck and read that cylinders 1&4 were mis firing.changed all 8 plugs and plug wires and check engine light reset.drove for about 20 miles and check engine light popped back up.truck feels like has ample power but dont want to go over 20-30 miles an hour or shift.sounds like a hissing sound coming from exhaust right by cat.converter.could converter be bad or plugged and causing engine to misfire?

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  • Anonymous Mar 15, 2014

    change computor still cant get inspected it saying that the cat and evp dint clear drove truck for well over 150 miles please help

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Had the same codes on my truck. cat converter was plugged. I was told to take the cat off and gut it, then put it back on and it would run fine, but that didn't work. You need a new cat. Might want to replace the o2 sensors before and after the cat also. Hope this helps.

Posted on Feb 27, 2009

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Coil pack,,, vacuum leak are good suspects... it has always appeared to me that the check engine light is only for emmission items so consider those. i had a ford windstar van with check engine showing. turns out there are two small pipes that come off the exhast with hoses that go back to a sensor mounted on the engine.... one was broken off.... i fixed that without replacing the pipe $140 for a 12 inch pipe.
If you should find that it is a tube broken off let me know and i'll explain a quick repair.

Robert

Posted on Sep 02, 2008

  • Roberta Smith
    Roberta Smith Sep 02, 2008

    further to this you may be able to read the codes without a reader... unless you have the codes already.





    Robert

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