Recent content by Steve 147

Pulled the codes and got a C12 and H72 C12 is just the diag mode isn't it? H72 has something to do with the gear selector switch I think. As it progresses thru the codes the digital display reads; 1 C12 4 No codes 9 H72 A No codes 1.0 No codes Steve

Well got it all back together and it started right up. I don't know, maybe it should have stayed broke so I could have been confident I found a problem and fixed it. Its probably a bad connection somewhere. Really the only thing I did between the time it would not start and this last time when...

Would you believe it! The car sat in the shop for almost 2 months with the battery disconnected while I was working on other projects. Sharron is not in any hurry. Anyway had some time to look at it. Unplugged all the injector connectors. Connected the battery, and cranked the engine over for 3...

Well crap, my plan didn't work. disconnected the MAF sensor, all other sensors connected. No change, No Start no injector pulse. The MAF sensor has never read anything but 0, electrical plug connected or disconnected, rubber snorkel connected to throttle body or not. Heck I even connected the...

Thanks ecss, your input is valuable. I'm not at the point of replacing the PCM yet but reprogramming the EEPROM is nice to know. It seems from all the test I have run the following is true. The opti spark is working. I have spark to the plugs. The timing advance is working PCM receiving signals...

Security light on when you open the door, insert key turn to On security light goes Off. Pressing the Eng Met button changes the display from F to C, appears serial bus is working. The PID on the scanner reports it as injector pulse width control in Mv. I assumed it was millivolts but since...

I am using the ignition key to crank the engine. That has always worked. I don't recall about the security light going off when I turn the ignition to on, I will look. The digital display was initially scrambled when I first got the car. That was several months ago. I had taken it out and...

Just found something. A friend of mine who knows the C4 told me to check PCM connector D (blue) pins 29 and 30 both are tan wires. They should be 2.5 v. They are 4+ volts KO as well as cranking. Seems there maybe a problem with the vehicle theft system. Maybe they shut down the fuel injector...

Thanks for the advice so far. I did a little more checking and rechecking my test results. I rechecked the ICM according to the TS flow. The color codes of the wires don't match the flow but using it along with the manual I have, I was able to determine the following KOEO. Pin A pink/black has...

It's in the same place on the C4 attached to the bracket with the coil. I considered it ok since I have spark thru the wires to the plugs. I'll take another look at it. I'm also going to look at a couple videos I found here in the forum about the Opti. I took the original GM opti apart and...

I'm not new to this forum but have just registered and this is my first post. I am working on a 94 for my friend Sharron and need some help. Back ground - The car has set for 2.5 years. Fuel stabilzer was added to the fuel and new fuel has been added from time to time. The car has been started...