Hesitation when starting when engine is warm

[Mustang5L5]

14,500 miles on my '03

If the engine is warm, like if i am driving around for 20-30 mins and i shut it off, it will sometimes hesitate if i go to start it 5-10 minutes later.

I will crank it the normal amount until it feels like it caught, but when i release it will bog down, maybe sputter and then fire up nice.

It doesn't do it all the time, maybe 25% of the time. Never when cold or when the engine is allowed to cool a decent amount of time (15-20 mins). It runs perfect when running, never bogs or acts funny at all.

Anyone know anything about it?

 

[vidmaster]

mine does this too. think it's because it idles @ like 500-600 when warm and 900-1100 when cold

 

[Jakes]

I had a similar problem with my 02GT where it didn't want to start right away when hot. It would crank for 3-5 sec's be4 starting, but not all the time. It was still under warranty so took it to the dealer. They replaced the IAC and it seems to be working fine now.

 

[bemol]

It's quite common I think, my 02 does it, and learned to live with it. The dealer flashed the computer, tested the fuel pump, to the same result. I think it does no harm though.

Cheers
Dan

 

[ADRENLN]

mines been doing it for a year at least, really pisses me off. i replaced the iac also, but it still does it. still waiting for a fix. i think it is fuel related some how. fuel filter, regulater, senser, pump,?????? somthing. anyway i starteded a couple of threads about this a while back. do a search to see some of the replies i got.

 

[vidmaster]

what i do is just push the gas down about a quarter way and let off real fast when it fires, runs great. My auto stalled in reverse today backing out of the driveway. First time it's ever done that and it only has 23k on it.

 

[Mustang5L5]

Thanks guys, i clean up the IAC and just learn to live with it. It's not bad, just annoying if i am doing quick 5 minute errands.

I don't want Ford poking around without not much getting done. I'm trying to force myself to come to grips with the fact that i gotta let them have the car for a few days to perform the infamous T-3650 TSB.

 

[StangFreak32]

mine does it too...it really only bothers me because i like the feeling of seeing peoples heads turns when they hear my exhaust when i crank up ...and when it does that bog thing it doesnt growl as loud during the startup

 

[vidmaster]

yea thats why i hold the gas in a little when I start it. then it gets that nice rumble instead of a stalling bog sound