viceversa Posted April 4, 2004 Share Posted April 4, 2004 92 Loyale, 105K miles on 1.8L EA82 195K miles on the rest of the car Today I am getting backfiring - when accelerating, I hear this loud "poof" type of sound coming from exhaust and the whole car shakes and hardly accelerates. This backfiring and hesitation happens mostly at 35-45mph but can happen at any speed. And, it misses at idle, and I can smell gas from inside. Is the catalystic converter plugged up with such high mileage? Or some kind of ignition problem (Like coil?) The plug wires are about 6 months old, but the local parts store had the cheapest kind, you know, the $12.99 type. Quote Link to comment Share on other sites More sharing options...
86subaru Posted April 4, 2004 Share Posted April 4, 2004 my guess is the timing is off or plug wires are switched Quote Link to comment Share on other sites More sharing options...
viceversa Posted April 4, 2004 Author Share Posted April 4, 2004 I have not messed with plug wires in a while, they worked before (but I will upgrade). Thus far I have narrowed down the choices to : The knock sensor retarding timing (happened on a Chebby once) The EGR valve getting plugged up with such high mileage. sticky vacuum advance mechanism. timing off. What's the most likely cause of this? Quote Link to comment Share on other sites More sharing options...
raceman77 Posted April 5, 2004 Share Posted April 5, 2004 check your distibutor cap very carefully for hairline cracks or carbon tracing on the inside Quote Link to comment Share on other sites More sharing options...
Meeky Moose Posted April 5, 2004 Share Posted April 5, 2004 sounds like you have a plug wire shorting out.. or the coil wire.. wait till its dark outside, then start it and look under the hood.. find the throttle, rev it a few times while looking around the coil wire and plug wires.. if its jumpin spark, you'll see it.. 90% of the time when a cat gets plugged it will smell like rotten eggs.. Quote Link to comment Share on other sites More sharing options...
viceversa Posted April 11, 2004 Author Share Posted April 11, 2004 I will follow this advice. But, the backfiring stopped. It only lasted 1 day. I used 89 octane gas, and I think it made it better, and improved my mpg from 29 to 30. Although it doesn't do anything strange with 87 either. Hm.. maybe water in gas? Quote Link to comment Share on other sites More sharing options...
Meeky Moose Posted April 11, 2004 Share Posted April 11, 2004 maybe a bad tank of gas.. been there done that.. i only run sheets in my cars now.. much better than exxon, lol.. Quote Link to comment Share on other sites More sharing options...
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