jojomanx

I need some help.
I have an LS1 in a Porsche with truck PCM and harness.
I have upgraded the PCM to LS1.
The engine starts and runs for 3-5 seconds.
I have switch the TPS, ICV and a AFM from a running vehicle.
No changes. Starts but does not run more than 3-5 seconds.

Where should I start looking?

jojomanx

Also new are the MAP sensor, coolant temp and intake temp sensors.
Only using foward O2 sensors.

MontecarloDrag

iTrader: (3)

Is VATS disabled in the tune?

jojomanx

It should have been! I will ask.

jojomanx

So VATS will allow the engine to start but not run? I thought it would have dissable the start from the beginning!
Interesting!

10-e-c-350z

correct.

MontecarloDrag

iTrader: (3)

You know VATS is enabled when engine starts but dies.
I have done several swaps and they always do that, start and die. A few only crank and don't start.

jojomanx

thanks!
Next week the tuner comes over and Im sure he will see it.
thanks again

jojomanx

anybody have a 2003 truck print? Or pcm pinouts?

MontecarloDrag

iTrader: (3)

Which truck?

jojomanx

I believe it was a 2003 4.8 harness and pcm.

rojs234

iTrader: (5)

Try going to www.lt1swap.com . They have the 2003 truck pin outs (among many others) and it's free. Great site!.
Ron

jojomanx

Isn't there a inline resister that I can bypass in the Harness?

MontecarloDrag

iTrader: (3)

These are the PCM pinouts from a 2003 Avalanche. They are the same as the 4.8L.
If the PCM/engine came from another truck, there may be differences but only a few.

01WS6/tamu

iTrader: (37)

The VATS must be disabled via a tuner only. On trucks the VATS run command is via the databus from the trucks bcm. It does not have a hardwired vats circuit..

jojomanx

We found out what it was! Tuner never flashed in VATS.

610 PCM can not be used on manual cable trottle bodies. Only on drive by wire TB's.
411 boxes are for manual TB's. We switched boxes and BINGO!

Porsche 928 w LS1 has started up and will be on the road as soon as we can get a plate on it.

Thanks guys for everything!

jojomanx

THANKS FOR THE COMPLETE PRINTS!

PICS AND VIDEO SOON!

HEANWHILE CHECK MY LS1 BMW OUT!

http://youtu.be/6UNDSKCguqc