Holley Performance Products Terminator EFI

[hifi875]

vacuum leak^^^ mine did the same thing, and found a leak.

[Chevelle489efi]

On manifold or TBI

[Derek@ModernSpeed]

Also check the iac %. Vacuum leaks, to much throttle opening, and iac position will affect the idle speed.

[Derek@ModernSpeed]

Hey Derek,
I'm installing the holley fuel system for an LS1 with the 550-602 ECU & Harness. Did all the wiring but can't seem to find a wire for the electric cooling fans, though there is a hookup for temp. Also can't figure which wire to use for the factory tach, though there is a yellow wire for RPM out (do not use on CD coil). Is this the wire to use for tach?

i would suggest using harness 558-400 to connect your fan(s). The yellow wire, if located in A1, can be relocated to A28. This is a 12v square wave output. Same signal auto meter uses for their tachs. I'm not certain the factory tach uses the same signal. Research before connecting.

Sorry for not being on lately. I'm working with several people and 3 ultra street/ real street race cars and getting my website finished. Feel free to call me or email me if I don't reply promptly to a pm. Thanks guys.

[oestek]

Here's a video series of a Holley Terminator system we installed on a '65 Chevelle. The install went smoothly, and the car drives really nicely.