Hey HT,
Just did a fresh rebuild on a GSR block with a few goodies in it, swapped it in last night and tried to fire it up. It starts, revs for a second then dies immediately. The fuel pump is priming, the timing is dead on, i checked all plugs and grounds, I just cant find a thing wrong that would make it not run. Its as if its not getting fuel through the injectors besides when it first primes with ignition power.
A little background on this is the ECU is tuned to a LSV turbo setup i had a few months ago on 680 injectors. I now have stock injectors and a small NA build. I have NO CEL's, no vaccum leaks, nothing. Im lost. This is the 7th swap and build i have done in this car by myself and have never had a problem such as this.
Any ideas out there? Ask as many questions as you want and ill answer what i can.

 

Measure the fuel pressure.

 

If you trying to run 240cc injectors with an ecu tuned for 680's it's not going to happen. To idle with 680's requires a short pulse width. Trying to make the smaller injectors run on that short p w = no fuel. Get it retuned for your set up or try a stock ecu.

 

x2!

Stock FPR? Fuel pump?

x2!

Try a stock ecu

 

Its a stock ECU and stockinjectors. I thought it would at least idle, but guess im wrong. im borrowing a stock ecu tonight to see if it will run.

 

Do you have a psi gauge? if so:

Then give us a reading..

What about fuel pump? is that stock also?

 

I will have one in a bit once my dad gets home with it.
I have a walbro 255 fuel pump though, less then a year old so i know im good there for sure.

 

FPR is fine so im banking on it being the ECU and injector size difference. My buddy is going to run by so i can borrow his ecu out of his 92 CX hatch...lol it should at least start.

 

Maybe you just plug in a wrong connector somewhere like map sensor to tps sensor

 

x2!

try swapping them around. Then start the car. This is typical because they both look the same.