IAC questions

[foxspy]

Hey guys,

I'm gonna enrichen the fuel some and close the IAC all the way on starts, but what shoud the IAC do when throttle position increases?? Do I want to close it as throttle position increases, or do I open it?? Also, what is the difference between "Warm-Up Enrichment" and "After-Start Enrichment", which one should be used to adjust the starts? Anyone know of some good pulse width numbers, just for example, when it's cold out??

Thanks for the help.

 

[troyk]

Try this, might help or might not.
Unofficial F.A.S.T. Manual

 

[Craig Smith]

After start enrichment is fuel that is added immediately after starting, as the name implies. It will decay out according to the other after start parameters you specify. It's helpful for keeping the car running after it starts, but it won't help the car actually start. If simply getting the car to fire is the goal, the cranking fuel table is where you want to make changes. You may also wish to experiment with the spark advance table and see how that affects your starting.