strong exhaust smell in car - Forums at Modded Mustangs
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post #1 of 29 Old November 9th, 2010, 12:11 PM Thread Starter
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strong exhaust smell in car

when the car is running it smells like it's running rich and I am not using dumps on my 89 GT.

I have been thinkin maybe I have an exhaust leak for somethin. what's your opinion?
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post #2 of 29 Old November 9th, 2010, 12:15 PM
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dumps will do that, my fox had dumps and did the same thing



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post #3 of 29 Old November 9th, 2010, 01:13 PM
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rich

rich as in fuel smell? if so replace your fpr. mine was bad and it stunk like fuel to the point i was looking for fuel leaks.
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post #4 of 29 Old November 9th, 2010, 01:19 PM
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i have the same problem actualy

and this is a noob question but... whats an fpr?

fuel pressure return or something?
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post #5 of 29 Old November 9th, 2010, 01:25 PM
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Did it just start all of a sudden, or has it always been like that?

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post #6 of 29 Old November 9th, 2010, 01:43 PM
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regulator. passenger side in the back on the fuel rail. mine stunk bad i replaced the reg and all was well.
pop ya hood off and shorty allen wrench. sucked for about 20 mins but, i wasnt interested in pulling my intake like i was told.
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post #7 of 29 Old November 9th, 2010, 02:24 PM
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Quote:
Originally Posted by lolStang View Post
i have the same problem actualy

and this is a noob question but... whats an fpr?

fuel pressure return or something?
Fuel pressure regulator. You can turn it with an allen key and it adjust the PSI of your fuel.

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post #8 of 29 Old November 9th, 2010, 03:08 PM
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Quote:
Originally Posted by brimmer555 View Post
when the car is running it smells like it's running rich and I am not using dumps on my 89 GT.

I have been thinkin maybe I have an exhaust leak for somethin. what's your opinion?
I would look for a leak first. Even if running a little rich, it shouldn't make it back into the car. Does it make a difference in amount of smell if your vent is blowing air or in the off position?

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Fuel pressure regulator. You can turn it with an allen key and it adjust the PSI of your fuel.
With an adjustable aftermarket one, the stock one and OEM replacements are non adjustable.

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post #9 of 29 Old November 9th, 2010, 05:01 PM Thread Starter
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[QUOTE=nolife;3290508]I would look for a leak first. Even if running a little rich, it shouldn't make it back into the car. Does it make a difference in amount of smell if your vent is blowing air or in the off position?

I haven't noticed any differance with the air on.

I just bought the car about 2weeks ago, and it's been doing it since thin.

Yes it has a rick fuel exhuast smell. I think I only smell it when my window is down.

do I really have to take off the hood to get to the FPR?
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post #10 of 29 Old November 9th, 2010, 05:10 PM
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No, you don't have to take the hood off.

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post #11 of 29 Old November 9th, 2010, 05:25 PM
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U need to seal ANY hole in the firewall with tape (or silicone) and then seal where the fresh air gets drawn in from under the wipers...seal it from the firewall side...i just did all this and it made a huge difference.

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post #12 of 29 Old November 9th, 2010, 05:26 PM
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Might be the headers or collectors.

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post #13 of 29 Old November 9th, 2010, 06:50 PM
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Might be the headers or collectors.

x2 on that check out your gaskets on the headers........ also check for tiny holes or a gap in the flanges....
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post #14 of 29 Old November 9th, 2010, 07:20 PM Thread Starter
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U need to seal ANY hole in the firewall with tape (or silicone) and then seal where the fresh air gets drawn in from under the wipers...seal it from the firewall side...i just did all this and it made a huge difference.
No I haven't sealed any of the wholes but then again I don't really notice it with the windows up.

Maybe i'lll just buy a set of headers an not tell the wife hehehe ssshhhhh
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post #15 of 29 Old November 9th, 2010, 07:25 PM
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No I haven't sealed any of the wholes but then again I don't really notice it with the windows up.

Maybe i'lll just buy a set of headers an not tell the wife hehehe ssshhhhh
For 50 bucks I won't say a word.

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post #16 of 29 Old November 9th, 2010, 07:27 PM
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Check the header gaskets first and the collectors

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post #17 of 29 Old November 9th, 2010, 07:35 PM
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Do you have cats on the car?
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post #18 of 29 Old November 9th, 2010, 07:45 PM Thread Starter
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Do you have cats on the car?
yes I have cats. if you look at my garage on here there is a pic of them, that I took while I had the car on the lift.

I was thinking about these headers what do you guys think

BBK 1-5/8 UNEQUAL LENGTH SHORTY HEADERS CERAMIC COATED 5.0L 1986-1993 - CJ Pony Parts, Inc.
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post #19 of 29 Old November 9th, 2010, 08:25 PM
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yes I have cats. if you look at my garage on here there is a pic of them, that I took while I had the car on the lift.

I was thinking about these headers what do you guys think

BBK 1-5/8 UNEQUAL LENGTH SHORTY HEADERS CERAMIC COATED 5.0L 1986-1993 - CJ Pony Parts, Inc.
I have a similar set of equal BBK coated shorties. They have been on for probably 8 years with no problems or leaks and still look decent. I'd double check your existing headers for leaks before swapping parts unless you want them anyway.

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post #20 of 29 Old November 9th, 2010, 09:57 PM Thread Starter
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I have a similar set of equal BBK coated shorties. They have been on for probably 8 years with no problems or leaks and still look decent. I'd double check your existing headers for leaks before swapping parts unless you want them anyway.
I want them lol. I'll just have to get gaskets and bolts for them because I don't think they come with the hardware.
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