Help! 89 Won't start when warm. Lets try again plz...

[DallasK]

The car starts and runs perfect when cold. Once warm and parked for a short time, it won't start. I checked with an OHM meter. When warm all injectors are at 18.0 with one at 18.1 and one at 17.9.
Cold the injectors are all at 16.4 with one at 16.2. Is this acceptable or does this variance between cold and warm mean it is an injector issue?

I also assume the fuel regulator is the black diaphragm looking part near the passenger side rail, towards the rear of the rail, that has a few silver bolts around it. Is that correct? It also looks like all bolts are in need of a standard star wrench type tool. Is this correct? Can this part be obtained at the local auto parts supply or is it something that generally has to be ordered if needed?

So I am trying to determine if the injectors need changing. Or if they do not should I go ahead and change the fuel regulator, or do I need to buy some sort of gauge to check the pressure on the regulator before replacing it? It would be nice if there were a picture somewhere here describing these parts and their location though I am sure I can figure it out eventually. I still love my car! Thank you.
Dallas

 

[metoo1012]

The tool if is like my 86 Vette is hollow torx.
Standard procedure. check fuel pressure at rail and see if the guage dops off when you turn
off the key. Slow bleed or fast. Clamp return line, test pressure at rail, then change clamp to supply side and see if pressure holds.

 

[DallasK]

Well I changed the injectors and fuel filter. Still wont start after it gets warm. Let it cool off and it starts and runs perfectly. Bummer.