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post #1 of 13 Old October 9th, 2015, 09:33 AM Thread Starter
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Rich Exhaust

Hey all,

So its been a while but I finally got my car back after some upgrades. I just had my 302 switched from carbureted to EFI but my car smells as though its running rich. I know the gas is a couple of months old but I don't know if thats the cause? Can anyone help me? Would any of those fuel system cleaners you get at pep boys make any difference?

Thank you!
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post #2 of 13 Old October 9th, 2015, 09:41 AM
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What efi set up are you using? Are you running a fuel pressure regulator? Also have you confirmed you have no leaks anywhere? Fuel system cleaner isn't going to help you if it's running rich.

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post #3 of 13 Old October 9th, 2015, 11:03 AM
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As TC mentioned. We need to know the type/brand of EFI used. Most of them have a learning curve so it may take a bit of driving before it fine tunes everything.

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post #4 of 13 Old October 9th, 2015, 01:03 PM Thread Starter
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Yes I have a fuel pressure regulator and the kit it is FAST XFI 2.0 Multi-Port Complete Fuel Injection Systems 3031302-05. From what I have read (and I may be wrong, but edgethis confirmed it), I might be impatient as it may take time and some long drives to adjust. Is that true? (sorry, this is all new to me).
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post #5 of 13 Old October 9th, 2015, 02:45 PM
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Yes, you have to drive it for it to learn. Do you have tailpipes or turndowns?

I tell the truth. Deal with it.
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post #6 of 13 Old October 9th, 2015, 03:13 PM
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I would say put some more miles on it and it should clear up.

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post #7 of 13 Old October 9th, 2015, 10:51 PM
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Are you running cats? If not, that right there could be it.
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post #8 of 13 Old October 9th, 2015, 11:01 PM
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Cats on a 70? LOL

I tell the truth. Deal with it.
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post #9 of 13 Old October 10th, 2015, 08:49 AM Thread Starter
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No cats lol. I'll drive it some more and see what happens. Thanks guys!
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post #10 of 13 Old October 10th, 2015, 12:50 PM
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Cats on a 70? LOL
Sure. Why not? Ive seen cats added to older vehicles before with fuel injection. Not that they need them, but it never hurts to ask.
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post #11 of 13 Old October 12th, 2015, 05:55 PM
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Sure. Why not? Ive seen cats added to older vehicles before with fuel injection. Not that they need them, but it never hurts to ask.
Because they rob power, add weight, and aren't required. I've never seen anyone go to the trouble to add smog equipment on a car that didn't come with it. Lol

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post #12 of 13 Old October 13th, 2015, 09:48 AM
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You may want to verify your O2 sensor is hooked up as well and in the correct location. The readings from this is how the fast system tunes it self.

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post #13 of 13 Old October 14th, 2015, 10:57 PM Thread Starter
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ok, I will check that out, thanks TCStang
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