harley71105

Well, shes out there one more time not starting and this time taking the fuel line off, cranking (gas is coming out) wont do it anymore...gotta wait till she decides on her own....somhow the fuel rail isnt filling up...maybe I should dissassemble and clean out, but if it was clogged it seems that she would either run rough or shut down while running, but never has....

WAYNE88N/A

LOL, this is turning into a project...

Is the circuit opening relay jumpered?

Do you have voltage at the pump wiring connector on the left strut tower?

These questions need to be answered before we go any further...

harley71105

yes, I tried the jumper, wont work....there is voltage at the connection on the strut tower...i've been fighting this for two years...

WAYNE88N/A

What do you mean by "won't work"? The jumper won't stay in there, or you jumpered it and that didn't fix it?

harley71105

it stayed in but did not resolve the problem...

WAYNE88N/A

OK, that's good, we just ruled out the AFM and (probably) the circuit opening relay. You really need to get an in-line electrical fuel pressure gage. This time you pulled the line and it had no pressure again? Yet there's voltage at the pump connector...Can you hear the pump running at all?

harley71105

If I miss your next post its because I'll be busy for a while...will catch you later but will see if you have any more info....really do appreciate your help Wayne..

harley71105

Well I put in one that I bought from Rotary Performance in Dallas a couple of years ago and its a rebuilt original so its really quiet, but I can pull the line and fuel shoots into the gatorade jar (lol)...just somehow doesnt seem to be getting into the rail...

WAYNE88N/A

Yeh, we know you get fuel when you pull the line and turn the key again, but do you have any PRESSURE at all during a no-start? We need to know this in real-time, while it's no-starting, instead of pulling the hose and then getting it later. This will determine what direction the troubleshooting will go from here.

You're getting a hell of a vapor lock or pressurized air bubble somewhere, maybe...

I mean, all we got left are the fuel lines themselves, and maybe that check valve that may/may not be in the lines somewhere...

harley71105

Yep....my instincts at this point are telling me that during a no start the fuel pressure is low, or else there would be a lot of pressure release when I remove the fuel line...I''ve removed many a fuel line on an rx before and there is almost always lots of pressure on the line....i'm getting a fuel pressure guage tomorrow to check the pressure in both circumstances. I'm getting pretty good at taking the fuel line off...any suggestions as to where and what kind to get?

harley71105

Bump

DigitalSynthesis

I got a Greddy electronic fuel pressure gauge (I like to be able to read the pressure in the cabin and running a fuel line through the firewall is a NO NO). I love it. Helped troubleshoot things many times that I would have taken days to figure out otherwise. Was expensive but well worth it. I installed it between the fuel filter and the primary injection rail so it "sees" exactly what the input to the fuel rails are getting. This will let you know if your FPR is working. If your FPR has blown a leak and is not holding pressure you'll get your problem. Also, its highly unlikely your rails are clogged but its ridiculously simple to check: pull the upper manifolds, pop the rails off, blow some compressed air through them, put 'em back on.