Something stupid??? I HOPE!!!

[yzpilot]

Ok..you guys...I just made a big liar out of myself! You guys got me wondering, so I just went out to the garage to check the fuel pressure. Keep in mind I checked the pressure yesterday with the old ECM. So...I just checked...and 0!! I have nothing! The pumps aren't even kicking on! WTF!!! I put power leads to the harness by the fill cap and both pumps are working great! Pressure was right at 53. But hook the harness back up...turn the key and nothing! Just that damn cooling fan and air pump! I am really getting frustrated! And thanks Franke...gonna go see if I can pull some codes now.

[yzpilot]

@ Kevin..brand new injectors, new filter, new plugs, wires, coils! Sure thought that would have solved the problem!

[Franke]

YZ, also thinking out loud, did you repeat your gas in the cylinders test after you replaced all those parts? Does it start and run then quit? You replaced quite a few things in hopes of a cure but may be in a different area of trouble shooting now.
ALZR1 if the vats system was the problem I don't think the car would crank as the starter enable relay would not operate. Correct?

[Franke]

"Franke...gonna go see if I can pull some codes now. "

YZ I am assuming you do have a SES light when the key is turned on. Correct? If you don't then you are missing 12 volts to the ECM and 12 volt supply.

[yzpilot]

Franke, I am seeing 2 lights. One in the LCD display where the fuel guage is, but it says SYS. It is continually flashing 12. And on the info display I am getting a "service LTPWS" that also flashes 12 over and over. And as for your question...I have not tried the gas in the cylinders again since I replaced everything.

[Franke]

I wouldn't worry too much about the LTPWS as that is the low tire pressure warning system and won't affect the engine start. Sometimes the LTPWS goes on occasionally then off. There are some threads about that system on the forum. I think you should have a ses light but not 100% sure. Do you have an after market radio?

[ALZR1]

Originally Posted by Franke

YZ, also thinking out loud, did you repeat your gas in the cylinders test after you replaced all those parts? Does it start and run then quit? You replaced quite a few things in hopes of a cure but may be in a different area of trouble shooting now.
ALZR1 if the vats system was the problem I don't think the car would crank as the starter enable relay would not operate. Correct?

Brain storming that is correct.was looking as possibilities



AL.

[Franke]

YZ correction to previous post. Could be a sys light as you mentioned. Another post from another source...

"Any time a sensor's output exceeds a Hi/Lo reference parameter stored in a Programmable Read Only Memory (PROM) array in the ECM/PCM module, an error code is set and retained in the ECM/PCM memory.

This event causes the lighting of the Malfunction Indicator Lamp (MIL) on the "tell tale" panel (more commonly known as the "Check Engine" light) or the SYS (System) lamp located on the instrument panel above the speedometer on later C4 automobiles .

If the problem clears and remains cleared for 10 seconds, the light will extinguish however, the error code is still stored in the ECM/PCM memory.

Regardless of whether the problem is constant or intermittent, the error code can be recovered through a user friendly system involving the MIL (Check Engine) or SYS lamp.

To the immediate right of the steering column under the dash, you will find a multiple pin electrical connector. This connector is called the Assembly Line Data Link (ALDL).

From 1984 until the end of the 1993 model year a 12 pin ALDL was used. After that, a 16 pin ALDL connector was used. The 1994 and 1995 model year still used the OBD-I system even though they have 16 pin connectors. The 16 pin connector in the 1996 C4 is used for the much more complex OBD-II system and a scan tool is required to discover the OBD-II system's secrets.

The early ALDL connector has room for 12 pins however only 7 are populated and of those we are only interested in Pin "A" and "B" for this procedure."
Code 12 is the correct code.

[yzpilot]

Should the ses light be on the info center? If so, I'm not seeing it. The radio is stock. That's why I love this car, everything is stock except for what I replaced the last few days! Even still had the lt-5 spark plug wires on it...in great condition except one!

[yzpilot]

Thanks Franke. So, my sys light is just flashing the all clear code! :-( But then again, I just changed the ECM, so that's probably why it has no codes stored. They took the old ecm as core!