Idle problem

[miser143]

Does eny one know what can the problem be this is on cold start. 1991 mustang gt 5.0 .tps is on .98v . New module new spark plug new idle control valve. Coil is good. Timing is done engine cooling temperature sensor is new .

 

[DadLife0724]

Base idle reset would probably do you some good. Tell us more about your Mustang. And.......

 

[miser143]

Also I smoked test it did not see nothing checked fuel pressure was at close to 40 psi .I disconnected the egr from the throttle body but still connected. But i but a plate on the thrutle. I have no ac .no smog pump connection. Maybe I have to replace the 02 sensor I have no cats all straight pipe. Underload it turn off sometimes.

 

[General karthief]

You check for codes?
You're already throw'n parts at it, this is a common complaint and the diagnostic procedure in here:

Cranks OK, but No Start Checklist for Fuel Injected Mustangs

Cranks OK, but No Start Checklist for Fuel Injected 5.0 Mustangs model years 1986-1995 A word about this checklist before you start: it is arranged in a specific order to put the most likely failure items first. That will save you time, energy and money. Start at the top of the list and work...

www.stangnet.com

Do what the directions say, don't jump around just because you installed new parts, they could be bad outta da box.
Best I can do cause we don't know what's been done or aftermarket parts.