[C1] C1 fuel injection—
Thread Starter
Heel & Toe
Joined: Sep 2017
Posts: 23
Likes: 6
C1 fuel injection—
Has anyone ever encountered a high pitched whistle coming from the fuel injection unit after it warms up. It seems like when it does this, it is hard to restart until it cool down. Then it starts and no whistle until warm again. Any input would be appreciated. Thanks.
Race Director
Joined: Jun 2006
Posts: 17,901
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From: Inverness FL
St. Jude Donor '07
absolutely.... just turn the BIG screw that controls idle air and it makes the coolest whistle sound... otherwise, you have a gross vacuum leak somewhere...
FWIW, there were/are AFB carburetors from the early/mid 60s with the same air adjustment screws that could be adjusted to make a sound just like FI
Bill
FWIW, there were/are AFB carburetors from the early/mid 60s with the same air adjustment screws that could be adjusted to make a sound just like FI
Bill
Last edited by wmf62; Apr 28, 2018 at 05:09 AM.
Race Director
Joined: Feb 2007
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From: northern california
C2 of Year Finalist (track prepared) 2019
Describe your procedure for performing a hot re-start. The problem you experience could just be a matter of technique.
Race Director
Joined: Jun 2006
Posts: 17,901
Likes: 751
From: Inverness FL
St. Jude Donor '07
OK, you have a 62 unit; wasn't sure what might be on the car
just for grins and giggles, and no harm done....
see the BIG screw in the yellow circle: note the position of the screwdriver slot so that you can return it to its original position if necessary, and with the engine running, turn the screw in and/or out ONE turn to see if there is a difference in sound or how the engine runs
Bill
just for grins and giggles, and no harm done....
see the BIG screw in the yellow circle: note the position of the screwdriver slot so that you can return it to its original position if necessary, and with the engine running, turn the screw in and/or out ONE turn to see if there is a difference in sound or how the engine runs
Bill
Last edited by wmf62; Apr 28, 2018 at 09:09 AM.
Race Director
Joined: Feb 2007
Posts: 15,491
Likes: 8,963
From: northern california
C2 of Year Finalist (track prepared) 2019
With racing gas, you shouldn't have much of a problem, if any. I would, however, go wide open throttle when cranking a hot engine. You say you crank for 5 seconds. What happens after that? Do you stop cranking or has the engine started by then?
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Thread Starter
Heel & Toe
Joined: Sep 2017
Posts: 23
Likes: 6
Thanks you wmf62 for the pic and help. I’m out of town till may 5 but can’t wait to try it.
Jim Lockwood-Thanks for helping with this. sorry I wasn’t clear. Duh.It does NOT start. I wait 45 Sec and try again. And again no start. Do it again- no start. It doesn’t start unless I wait till it cools at 21/2 hours.
Jim Lockwood-Thanks for helping with this. sorry I wasn’t clear. Duh.It does NOT start. I wait 45 Sec and try again. And again no start. Do it again- no start. It doesn’t start unless I wait till it cools at 21/2 hours.
Race Director
Joined: Feb 2007
Posts: 15,491
Likes: 8,963
From: northern california
C2 of Year Finalist (track prepared) 2019
Thanks you wmf62 for the pic and help. I’m out of town till may 5 but can’t wait to try it.
Jim Lockwood-Thanks for helping with this. sorry I wasn’t clear. Duh.It does NOT start. I wait 45 Sec and try again. And again no start. Do it again- no start. It doesn’t start unless I wait till it cools at 21/2 hours.
Jim Lockwood-Thanks for helping with this. sorry I wasn’t clear. Duh.It does NOT start. I wait 45 Sec and try again. And again no start. Do it again- no start. It doesn’t start unless I wait till it cools at 21/2 hours.
Has your unit been retrofitted with an electric anti-siphon valve? If it doesn't have one and if the check valve internal to the FI is failing, you could get a flooding condition which would prevent a hot re-start.
If your unit does have the electric valve, then try this: Next time the unit doesn't hot start, take your foot OFF the accelerator and crank the starter. Your engine may just be telling you it needs fuel. Don't laugh; I've seen it happen.
Jim