[proracer97]

wen i first start up mi car in the mornin it idles fine but wen it gets warm it starts to surge to the point were it almost stalls. wats wrong?????

[Iwannagofast]

i would say vacuum leak but it should have problems in the morning also

[fogged306]

FORDMUSCLE webmagazine: Fixing the 5.0L Surging Idle - Ten Pin Connectors

Just one of many different "solutions" for this problem. Its a pretty common problem on these cars.

Also see the sticky at the top of the 5.0 forum titled "Base Idle Reset.

[teal89]

Originally Posted by Iwannagofast i would say vacuum leak but it should have problems in the morning also

I'll have to +1 on that one. I have a vacuum leak at my lower intake mani where it's spitting a minimal amount of oil to the firewall all because the guy replace the gaskets and didn't replace the pcv lower filter. and I get that same surge/erratic startup and idle. Even when driving, it feels like i'm hitting up and down on the gas a bunch of times. Check for vac leaks like he says man. When I rev, it takes slightly longer to return back down and that's a vac leak for sure.