Loud noise / Backfiring Problem
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 3,229
Likes: 52
From: Pomfret, CT
Finalist 2020 C4 of the Year - Unmodified
Loud noise / Backfiring Problem - UPDATE
Hi people,
About two months or so ago, I was driving my 92 vert and all was fine. After about an hour or so ride home, I stopped to pick up my daughter. The car was off for about 15 minutes. When I got back in and started it up, it was much louder than usual. Not a good loud either. Info to note, the car has muffler elims on it. I limped it home and took a look underneath. I could not find any exhaust leak issues evident. With the car idleing in the garage it sounded fine, so I took it for a ride. It was obnoxiously loud and backfired every time I took my foot off the gas. Seems like a back pressure issue?!?!
Any ideas? I'm dieing without my car for the whole season so far.
Help!!
Thanks,
-Rick
About two months or so ago, I was driving my 92 vert and all was fine. After about an hour or so ride home, I stopped to pick up my daughter. The car was off for about 15 minutes. When I got back in and started it up, it was much louder than usual. Not a good loud either. Info to note, the car has muffler elims on it. I limped it home and took a look underneath. I could not find any exhaust leak issues evident. With the car idleing in the garage it sounded fine, so I took it for a ride. It was obnoxiously loud and backfired every time I took my foot off the gas. Seems like a back pressure issue?!?!
Any ideas? I'm dieing without my car for the whole season so far.
Help!!Thanks,
-Rick
Last edited by cicch95; Jul 28, 2010 at 06:34 PM.
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 3,229
Likes: 52
From: Pomfret, CT
Finalist 2020 C4 of the Year - Unmodified
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Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
On another Forum, a guy just spent a LONG TIME, and investigating all sorts of things, trying to track down a back-firing problem. Turned out to be a bad plug wire (#5) that crumbled when he tried removing it.
Replacing it cured his issue.
Jake,
Replacing it cured his issue.
Jake,
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 3,229
Likes: 52
From: Pomfret, CT
Finalist 2020 C4 of the Year - Unmodified
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 3,229
Likes: 52
From: Pomfret, CT
Finalist 2020 C4 of the Year - Unmodified
Right now, I'm down with the flu or something......I must take a look when I get better. I hope it's something simple....and not one of the more serious suggestions. Thanks for all the replies.
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 3,229
Likes: 52
From: Pomfret, CT
Finalist 2020 C4 of the Year - Unmodified
OK, so I am finally feelign better so I went out to the garage and took a look. I could not find any problems with the exhaust. The wires are all on tight and feel soft, no dry rot. I do not hear any noise from under the valve covers, so at this point I chose to leave them on!
I jumped the codes and got a 43 and a 64. So, these tell me that I had a problem with either the knock sensor and/or theo2 sensor. Right? Could this cause my problem? (see above)
Thanks,
-Rick
I jumped the codes and got a 43 and a 64. So, these tell me that I had a problem with either the knock sensor and/or theo2 sensor. Right? Could this cause my problem? (see above)
Thanks,
-Rick
