ground controlled circuit, got ya, didnt even think of that.

but still there should only be one pulse right?

the only way i ever checked an injector driver circuit is to plug a noid light into the injector harness connector, if it blinks your good, is this how you checked it and did it blink

 

I did not follow all the responses, but I did see you mention Delteq.

I have a Delteq system as well. Is your ignition fuse blown? Are any of your fuses blown? There is a part of the Delteq harness where they mixed up 2 wires. It is one of the plugs going to the rear of the ignition module. Once I switched those two wires, it stopped blowing the fuse and would start.

I'd have to get to my car to see which wires they were, but you might want to check with Delteq which wires they are. They told me to temporarily swap the wires with a butt connector, and sent me a new one in the mail.

Just an idea.

 

FYI the motor runs on brake parts cleaner. It's a fuel system issue.

 

More update...

Here is what i ve found on the net:
"If the injector are not opening the main problem is that the low resoltion signal is not reaching the pcm this could mean a bad opti or a bad harness"

If my opti give the signal to make my car spark it means that my opti is good ?Right?

Ive tested the opti harness connector "low resolution signal" continuity to the pcm and i get no signal.

I tested it from the "y" of the delteq and i got continuity.This would mean that my opti harness is faulty?

 

Sounds like it. You should have continuity back to the PCM. Must be a break in the line somewhere. Easy enough fix.

 

Well forget it,ive tried another one wich was perfect and still no pulse

 

I think it's the wiring from the opti to the pcm. Check the harness by the intake. Could be a split wire somewhere down the line.

 

Ive check the continuity of all of them and they are perfect,man thats the first time that i hope to find something wrong on my car

 

I thought u said it didn't trace back to the pcm?

 

If the PCM shuts down the injectors due to loss of the optical encoder signal it would THROW A CODE!!!!!!!! No code, look for another reason for injectors not pulsing.

In fact I was helping 2 people with a DTC41 which also shuts down the injectors.

FWIW, seen many PCM go bad not able to "drive" the injectors.

 

I ve tried 2 with no luck.

 

Man its a horror movie right now

I ve re-installed my stock ignition system(gm opti/msd cap/msd rotor/msd blaster coil/accel wire 9000) .

Now i got the negative injector pulse on the noid light that i just bought.The only thing that i dont understand is that the blinker did not blink really bright,very small but steady blink

The worst is that my car still doesnt wanna start.It crank make a little backfire then nothing

 

I would personally throw your stock injectors back on and just try firing.. it is easy enough and wont take but a few minutes.

 

My '94 did something like that when I installed the opti incorrectly, such that the key in the cam/opti driveshaft wasn't lined up right.

 

Ok bringing this to the top because...im still searching.

Since im crazy i ve bought:
-New in the box A/C Delco opti for a good price from a member(thanks vernw)
-Racetronix 32lb injector just to see
-Still waiting for the opti simulator and the new Delteq brain box from delteq.

With these parts, everything in fuel and ignition will be new.

I ve re-think about it.When i ve done my pulse injector test with the noid light,the blink was not really bright.Then i ask myself:"the injector system is a 12volts system right??? so the blink on the noid light should be bright to...right?

I ve connect the noid light directly to the battery to see what kind of brightness it should have and i can tell you that the signal that i got from the negative pulse is maybe 75% less brighter than that.I can barely see it.

Does this mean that i could have a bad ground somewhere in the circuit?Or again my logic is bad