DS4 IP experts

[Twisted Steel Performance]

I have a new build on the run stand and I'm having a lot of trouble getting the timing set. Everything I'm using was used a month ago so I know that part works, and I use GMTD on my laptop and have done it before.

Now, this time I'm using the customers used IP & injectors, and pmd extension harness, my known good pmd. It's very hard to start, very smokey burn yo eyes fuel, doesn't want to idle, skips and smokes worse if reved up...

Once hot, click time set, it won't idle if I try and get lower than 7*, target is 3.5* ......... get it to 4.5* and click offset learn it dies instantly, doesn't want to restart...

No matter how much I move the IP, I can't get the offset to change from -2.02 .... and it always throws the offset error code....

I'm so new to the ds4 y'all lead me where to go from here, I suspect IP or maybe a sensor but not sure how to diagnose .....

 

[ak diesel driver]

Those OBD1 systems can be a bugger to get out of that -2.02 mode. If you set the IP so the top of it is level it should be in the ball park. Then start it and immediately try to do time set. No waiting at all. Might have to do the resistor mod to fool the ECM that it's up to temp.