It's always been right around 30 hz but I"m getting a signal now that is unstable and going way higher hz. Changing the bin file would be a good idea, but I'm not set up to burn chips. That's why...

Finally had some real progress today. Decided to test the 30 hertz fuel enable signal again. Last time I tested it was good. This time signal started out at 30 hertz then went crazy. Anywhere from...

I have the 90 Camaro factory service manual to get my specs from. It was about 80 degrees when I tested the injectors. They all ohmed within factory specs. I tested the pickup coil for dist using ac...

Car has brand new distributor. Checked it out and everything in dist is top notch. Old dist had cracked magnet.

Thing about the dist in relation to injectors. If I pull dist out and turn by hand,...

Voltage runs just under 12 volts when hooked to injector. If I would have had a square wave source at hand, I would have used it. But I used what I had.

Hit one injector with the ultrasonic...

Am currently cleaning my fuel injectors. Soaking the bottom part of injectors in my special blend injector cleaner. Will soak for a week. The first soaking changed the clear fluid to a orange brown...

System voltage shows normal reading at gauge and scanner. I thought about alt putting such a heavy load on engine and making it die. So I unplugged alt, car still died. Removed drive belt also to...

Decided to check my injectors again. Last time all 6 had great spray patterns, didn't leak when closed. This time I had 2 that dribbled when closed, 1 that wouldn't close and sprayed all the time,...

When my assistant sprays gas in tb, and I open throttle, tps gives smooth change in open %, map reading change with change in throttle position also. What doesn't change is injector pulse width. And...

Tps is functioning correctly, I will take a look at readings new iac gives. But when I have an assistant spraying gas in tb to keep running, if I press throttle down, fuel injectors still don't...

Engine has no maf, runs speed density, and uses batch fire injector strategy.

My scan tool reads sensor data but does not save it. I have read data when car is running normally. Have read data when assistant sprayed gas into tb. Big difference is pulse width of injectors. ...

Have a question. Are the injector drivers in this ecm part of a quad driver circuit? And if yes, what other components are on this quad driver?

The injectors of 1990 camaro 3.1 are batch fire...

Fuel pressure is 43 psi @ key on prime. And when idling it is 36 psi, just as it should be. There's no problem with fuel pump running when engine is running. It's just that pulse width of injectors...

Have a fuel related problem with my 1990 camaro 3.1 v-6 auto trans car. Drove car to library last Monday. Came out and engine would start & run for about 4 seconds then die. Would repeat this...

My connector plug is in the same shape as yours. So I will give reversing the plug a try. Will report the results later. Thanks for the tip.

Bingo, that was the problem. Bad condition of tabs on...

My understanding was what you said, that dist should have spark with no hook up to ecm. I'm grasping at straws now. I've tested the B+ wire going from ignition switch to coil. There's no voltage...

Both grounds from ecm are there, as well as, ground strap to firewall. All grounds are clean. When doing continuity check have 0 ohms resistance. 2 grounds on left cylinder head are also good.
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Would you believe I had changed the transmission dip stick tube seal to start this mess. I've been trying to figure this out for over 2 weeks now.

Even though this is not directly a fuel injection problem it is related to the whole ecm, injection, est system.

Long story short, I did some completely unrelated work in engine compartment of my...

Stopped in to say hi. Came here to increase my tuning knowledge, and find bin files of other tunes as a comparison. Looks like there are many knowledgeable members here.

Noticed you have a small...