Posted on Dec 05, 2010

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1995 Boneville 3.8 no supercharge. starts and idles fine but when reved up to about 2000 rpm starts missing/backfiring badly.exhaust would become red when reving up.removed cat converter did not look bad to me looking inside it. does seem to run better with open exhaust now but still bad. new plugs and wires new cam sensor. Tryed capping off egr no change.check engine light only comes on when reving up. Problem happen abruptly when I was driving at highway speed however I did notice a hot burnt plastic smell in the weeks before

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Anonymous

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Posted on Dec 05, 2010

Anonymous

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You need to check the 02 sensor that is on the engine

the converter is probably blocked if it is turning cherry red.

try putting some fuel cleaners in your system like heet from auto zone

you need to make sure the wires are in the right order

make sure there are no breaks in the wire

if you have a check engine light, you should take it to auto zone to get it tested for a better insight

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95 Jeep Wrangler, 2.5, low idle, shakes with a miss, fuel inj, but backfires through the intake, clears up at higher rpm but still no power, new plugs, wires, cap, rotor and fuel filter!! Any ideas?

1995 Jeep Wrangler

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