I can't get my vette runing when the engine is at ambient tempeture ill take from 5 to 10 cranks before I can get it running. After the car reach opperating tem. it will run at the first crank. I replace every censor including, ditributor and ECM. Please help.

 

How's your fuel pressure when trying to start? I had a similar problem with my 89 and it ended up being a fuel pressure regulator. You can attach a fuel pressure gauge at the Schrader valve on the fuel rail to get a reading. Unfortunately I don't remember what the reading should be.

 

I took a reading in all the injectors on my 89 vette when hot and they reads as follow, all thereadings are in ohms. #1=19.0, #2=14.0,#3=19.6, #4=19.6, #5=13.0, #6=20.0, #7=14, #8=20.0: someone please tell Me if this is the cause of My starting problem, also took a reading whiht the Ps gauge and the reading was 48 PSI, after several minutes the pressure drop to 30 psi. need help. Thanks

 

I would put a scanner on it and see what the temp sensor is reading in relation to app wngine temp. do this in the morning after the car has sat all night.

 

It could also be a failing fuel pump. Sometimes they act that way before failing.

 

One possible cause is the fuel pump relay. If it goes bad it takes several seconds of cranking for the oil pressure to build and then oil pressure override circuit activates the fuel pump.

 

Given your problem is when cold starting ,what are the injector readings when cold?

 

Theinjectors reading when cold is betwing 18.1 and 18.4 in all 8 injectors.

 

While cranking the engine wiht the PG. hook up stays at 48 psi.

 

If you put your foot to the floor it will go into flood clear mode. If your injectors are leaking this should allow it to start faster, and you'll know the injectors are bad.

 

Any body out there Knows the ohms for the 89 vette injectors cold and hot whent they are good, please help.

 

Just what I was thinking...