Questions about a possible backfire. - Ford Mustang Forum
 
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post #1 of 5 (permalink) Old 05-08-2015 Thread Starter
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Questions about a possible backfire.

Hey guys, i got to get back out in my 2000 gt and the first thing i noticed was once i shifted into second driving away, i hold my shifts until 3000-3500rpms just because the owner does not let the car be who he is, and a loud pop coming from the engine compartment surprises me. The car has always crackled in the exhaust but never like this, although it did go away after i reprogrammed the pcm back to factory settings until i put in the IAC restrictor into the car. This is the first time i have stumbled apon this issue and i recorded what it does somewhat but it is not a good description of how bad it it. Honestly i hate letting the engine decel by itself just because of the noise. It is not a major deal for me its just a nuisance to me driving around. The CEL is on because of the lack of CATs. Thanks for any information in advance.


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post #2 of 5 (permalink) Old 05-10-2015
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I think you should remove the restrictor plate....

I'm not totally sure what was happening in this case...I'm not totally following your description but I do know there tends to be issues with adding those restrictor plates in the IAC vac line...


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post #3 of 5 (permalink) Old 05-10-2015
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Quote:
Originally Posted by JonR2006 View Post
I think you should remove the restrictor plate....

I'm not totally sure what was happening in this case...I'm not totally following your description but I do know there tends to be issues with adding those restrictor plates in the IAC vac line...
I agree, try that.


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post #4 of 5 (permalink) Old 05-10-2015 Thread Starter
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Alright, thanks guys, how should i make the rpms drop faster then? It is a 5-speed and it use to, prior to the idle restrictor, it would grind sometimes going into second if i shift too fast. But as soon as the weather gets better i will be able to remove the restrictor. Thanks again.

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post #5 of 5 (permalink) Old 05-11-2015 Thread Starter
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That was quite the issue for the car. On top of causing the backfire it also made a misfire in low rpms. Now the next thing since i removed the restrictor, the SOB refuses to go into any gear at a dead stop. Guess ill have to see what happens when, or if, i can get a firewall adjuster for the car. Thanks guys.

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