jeff48920

Well those didn't show up well at all.



Here they are as full size jpgs. one at a time

jeff48920

#2

jeff48920

Part 3

Last one

Srce

9BASE3

At the ver top of this page you can see the injectors.. They all share a common 12V source which has tested good. The lower side of each injector show the grounds.. They are NOT common, and all trace to a seperate pin on the ECU. THIS is why I'm so boggled.. If they don't share a goddamn ground, then why do they ONLY work when I make them share one??? You'd think (Dangerous word for me) that if they all had individual grounds, that when I don't tie them together, that at least ONE of them would work... But NOOOOOOO not mine. It's all goofy. It's almost as if both aren't grounded, neither will work, and if they are both grounded they work (which would mean that somewhere they DO both share some sort of signal to operate...) Confused yet??



Jeff,



Thanks MUCH for the pics. You're the man! Hopefully I get get this fixed so you can tune it!

boostdfd3s

So those four pins in the wiring harness test good for voltage and ohms all the way to the inj clips? I would have to say at this point the ECU cant be ruled out...because even though it'll run the car rigged up, it doesnt function normally. Unless one of those engine/chassis grounds was missed and that was the mysterious culprit. And between those two, the only way to really test is to add in grounds, or change the ECU out and see what works.

lane_change

If all 4 injectors "do" share a ground....then is it possible that your secondary injector resistors are somehow wired wrong, which could disrupt the signal for all 4 injectors?

boostdfd3s

well according to the wiring diagram, they all share a separate grounding pin back to the ECU, so i doubt wrongly resistoring the 2ndaries would have any affect on how the primaries function...but im no expert on the PFC.

tampaFD

this has become kind of muddled.



you used the noids and they flashed ok? on both sec and primary?



you have fuel press?



the regulator is set to the right press?

9BASE3

Yes, yes and yes. Not one thing fails tests until I try to start the car.. Everything shows good except the injectors aren't opening... They open fine when jumped, but no other way..



I grabbed another PFC so I'll see if that fixes it.. I sure hope SOMETHING checks out..