Hard to start when warm

[70L34]

Hey everyone,

I have a FAST B2B on a Pontiac 455. Got a hard starting problem that I hadn't noticed until this week. I parked the car at a friend's house for about two hours and had a hell of a time starting it after it had sat. I don't really have a problem starting it when it's totally cold, and hot starts are immediate. The problem only occurs when the temp is in between. Can anyone tell me what the relevant plots (i.e. cranking fuel vs CTS) are 'supposed' to look like? A gct would be helpful. If anyone wouldn't mind helping me, I can plot my gct file as well. Thank you!

 

[Ricky Trussell]

Did you have to open the T/B to get it to crank? If so you need less cranking fuel. If not add more cranking fuel at the engine temp where it was hard starting.

Cranking fuel is engine specific because of IAC start positions and throttle blade setting.