92 Sc400 Warm Engine Won't Idle At Start Up

[holeshot808]

1992 SC400

New Coil Packs

Replaced ECU

Engine is warm and shut down for about 5 minutes or more. At restart the engine will not maintain idle and dies in park. Takes about 5 times to start and idle properly. If I turn the key on and off for about 3 to 5 times without starting the engine, the engine then starts and idles properly without dying. Does this sound like a fuel residual pressure problem. It starts and idles without any problem when the engine is cold. What's the problem? What can I check if I put a fuel pressure on the system?

[SKperformance]

It is your IACV on your throttle body as well as the throttle plate. Easy check is to press the throttle lightly and it runs fine.

[holeshot808]

It is your IACV on your throttle body as well as the throttle plate. Easy check is to press the throttle lightly and it runs fine.

FYI, previously I had pressed hard on the throttle with no effect. Thanks for the advice, I'll give it a try.