FiTech issues. - Team Camaro Tech
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post #1 of 13 (permalink) Old Jun 20th, 19, 02:09 PM Thread Starter
DT
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FiTech issues.

Anyone running FiTech ?? My buddy just installed this set-up on his GTO and he can only drive 50 yards and the car dies and will not start unless you put fuel in the throttle body. He only has 6in of vacuum because of the cam he is using. Maybe more vacuum needed ?? Any ideas ?? Thx

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373

Last edited by DT; Jun 20th, 19 at 03:56 PM.
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post #2 of 13 (permalink) Old Jun 20th, 19, 02:48 PM
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Re: FiTech issues.

Radical cams and self tuning EFI generally donít play well together.

Don

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
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post #3 of 13 (permalink) Old Jun 20th, 19, 03:16 PM Thread Starter
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Re: FiTech issues.

Quote:
Originally Posted by dhutton View Post
Radical cams and self tuning EFI generally donít play well together.

Don
Ahh, thanks Don. This is what I was thinking.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #4 of 13 (permalink) Old Jun 20th, 19, 03:22 PM
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Re: FiTech issues.

He should call Fitech with his cam specs.

Don

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
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1956 Cameo project - C5 drivetrain
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post #5 of 13 (permalink) Old Jun 20th, 19, 03:56 PM Thread Starter
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Re: FiTech issues.

Quote:
Originally Posted by dhutton View Post
He should call Fitech with his cam specs.

Don
I'm afraid too many calls to FiTech, sometimes a 30 min wait, Ughh.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #6 of 13 (permalink) Old Jun 20th, 19, 04:34 PM
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Re: FiTech issues.

I've had an FiTech system on my car for two years and put over 2500 miles on it with no problem. I would call FiTech or send an email. They will reply. It might sound like a stupid question, but did he follow the directions? The trouble shooting procedure will be different, depending if he is running the fuel command center or a pump in the tank. Either way, I think he needs a return line to the tank. Good grounds are also very important on that system. Once he gets the issue worked out, he will love it. Throttle response is awesome at low RPM.

Good Luck with your trouble shooting

Mike
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post #7 of 13 (permalink) Old Jun 20th, 19, 04:39 PM
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Re: FiTech issues.

Manifold vacuum has nothing to do with fuel starvation. The system is pressurized by the pump. Check the return line?


You can figure it out
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post #8 of 13 (permalink) Old Jun 20th, 19, 04:45 PM Thread Starter
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Quote:
Originally Posted by MJK-4 View Post
Manifold vacuum has nothing to do with fuel starvation. The system is pressurized by the pump. Check the return line?


You can figure it out
Mike
The fuel regulator is controlled by vacuum.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #9 of 13 (permalink) Old Jun 20th, 19, 05:17 PM
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Re: FiTech issues.

Quote:
Originally Posted by MJK-4 View Post
I've had an FiTech system on my car for two years and put over 2500 miles on it with no problem. I would call FiTech or send an email. They will reply. It might sound like a stupid question, but did he follow the directions? The trouble shooting procedure will be different, depending if he is running the fuel command center or a pump in the tank. Either way, I think he needs a return line to the tank. Good grounds are also very important on that system. Once he gets the issue worked out, he will love it. Throttle response is awesome at low RPM.

Good Luck with your trouble shooting

Mike
Tell us about the cam in your car. What sort of vacuum does it produce?

Don

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
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post #10 of 13 (permalink) Old Jun 20th, 19, 05:17 PM
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Re: FiTech issues.

Quote:
Originally Posted by DT View Post
The fuel regulator is controlled by vacuum.
There is a vacuum port on an external bypass reg. However even if not connected at all it will not cause the issue he is experiencing.

I would venture to guess he is loosing or getting dirty rpm signal which causes the system to not see rpm and shuts off fuel.
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post #11 of 13 (permalink) Old Jun 20th, 19, 05:29 PM
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Re: FiTech issues.

Good issues raised above. Has he verified proper fuel pressure?

Isnít there a setup parameter for vacuum/camshaft with the Fitech system? I thought there was.

I think John has installed a Fitech system. Hopefully he will chime in. Edit, never mind...

Don

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
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1956 Cameo project - C5 drivetrain
1957 Buick Caballero project
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post #12 of 13 (permalink) Old Jun 20th, 19, 06:00 PM Thread Starter
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Re: FiTech issues.

Quote:
Originally Posted by Vega$69 View Post
There is a vacuum port on an external bypass reg. However even if not connected at all it will not cause the issue he is experiencing.

I would venture to guess he is loosing or getting dirty rpm signal which causes the system to not see rpm and shuts off fuel.
Thank you John. I will look at his wire set-up.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #13 of 13 (permalink) Old Jun 20th, 19, 06:01 PM Thread Starter
DT
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Re: FiTech issues.

Quote:
Originally Posted by dhutton View Post
Good issues raised above. Has he verified proper fuel pressure?

Isnít there a setup parameter for vacuum/camshaft with the Fitech system? I thought there was.

I think John has installed a Fitech system. Hopefully he will chime in. Edit, never mind...

Don
Thanks Don, he checked fuel pressure at the pump only. I told him that was no good. I suggested to check fuel pressure at throttle Body.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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