SloZ06

I have a 98 TA with an LS1 that has developed a serious problem. One morning it just would not start. After having a new pump put in the car due to no fuel pressure, It STILL has no fuel pressure. Me and a friend started doing some checking, and when you hotwire the pump at the relay, it builds pressure, so the pump is in and working properly. The injectors on the car are NOT clicking, so it seems the PCM is not sending the proper pulse to open them.

What would cause the car to have no pressure unless hotwired, and have no injector pulses? Possibly a bad PCM?

Thanks for your help.

crainholio

iTrader: (2)

VATS failure may be the cause. Whip out your code scanner and see if any error codes are stored.

Also check the fuse panel, each and every fuse pull & inspect.

SloZ06

Checked the vats........ will not let it crank at all, when the vats is disconected. checked all fuses....all good

crainholio

iTrader: (2)

Whip out your scanner, check for codes, then watch the RPM indicator while cranking. Should increment revolutions while the starter is spinning the engine.

SloZ06

checked with autotap and got P0601 trouble code! Bad computer? could programming fix?

crainholio

iTrader: (2)

I just did a SEARCH on that error code and found this:

DTC P0601 Control Module Read Only Memory (ROM)

This sounds like a hardware issue, if so it's replacement PCM time.

Another_User

Your flash memory is not readable. Either the hardware failed (most likely), or the data became corrupt. I would be really interested to see how it would react to a re-flash (if that can even be done).