HISSIN50 said:To run with your FP idea: If you cycle the key a couple times before starting for the first time, does it stay running?
How do you have your idle set? Do you need the IAC to maintain a warm, no-load idle?
garystocker said:I agree. Clean throttle body and change oil. Believe it or not...every time I notice that starting to happen with my car I change the oil...and it never does it again until the oil gets dirty. I can't say why that is...but it worked for my 5.0 it can work for yours. (I assume you have a good cap and rotor, I just clean the contacts on the inside of the cap and it lasts for a good while longer without stalling)
-oil
-cap-
-clean throttle body
90mustangGT said:Try to get the codes. If no codes the #1 most likely cause would be a weak fuel pump. Of course it could be a number of other things as well.
I would use Throttle body cleaner - like you said, you dont want to remove the teflon coating present in some TB's.MYSTICSVT said:Can I clean the inside of the throttle body with carb clean? I thought I heard once that they have a coating that prohibits that.
HISSIN50 said:I would use Throttle body cleaner - like you said, you dont want to remove the teflon coating present in some TB's.
While 5.0's are not as finicky as some cars with regard to to stalling from dirty TB's, that thing sounds like it might be filthy. The IAC is right there too, if one wants to clean that.
Like I said originally, I dont like the FP as the cause here. It starts immediately initially and thereafter - good pressure. It seems like an engine management hicup or dirty actuator of some sort.
Here is a write up with info for cleaning the IAC and TB.
Good luck.
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