Hey guys, i'm a newb in regards to pfc's. Background of things, my FD is fiarly stock with only exhaust and intake and pfc. My pfc has a map specified for my FD. The car was running fine before this. As soon as I installed my pfc, my airpump seized but was idling fine... just make squeeling. I replaced my airpump with one I had spare, so it doesn't squeel or anything anymore. My problem now, which did occur during the airpump incedent is

My FD refuses to stay alive with my PFC. I have cut the wires as intructioned to do. I have changed my TPS.

Current VTA1 = .5
Current VTA2 = 1.2

Previous VTA1 before adjust = 1.xx
Previous VTA2 before adjust = 3.xx

Air bleed screw is at the position where it should be to assist the pfc to learn how to idle which is sleighty open.

I'm really confused and and unsure of what is happening. I put my stock ECU back in today and it ran alright... idle wasn't great but it had no problem staying on. As soon as I hit boost with the stock ECU, the car would fall on it's behind - the same thing happened to me when my airpump was blocked. But as soon I as try start it with the pfc, it starts, idles to 2200rpm ish then just dies... all the time. I adjusted air screw once and opened it more which actually made my FD stay on for a little logner but only idled at 500rpm and was very rough.

I was reading something about the PIM screen? Like I said earlier, it's not running the BASE MAP, my tuner has put a map to suit my FD... Any ideas? Need help asap

Thanks guys in advance

 

Since you are having problems with the stock ecu, fix it that way first before going back to the PFC.

Too many thibngs can be bad, so ALL have to be verified.

 

Ok, so I put the stock ECU back in, and everything is fine again, just like it was before I put the PFC in... now what can I do?

Dennis,

 

I have installed a few PFCs on non-rebuilds and rebuilds without any problems.
Is the PFC new/never used or did you buy it from someone as used?
If used it most likely was tuned for a specific engine setup which could be the problem.

This is one thing to try that works either way, PFC RESET to clear out any custom tuning.

Install the PFC, turn the key on but do not start, follow page 38 of the manual.

 

The PFC was purchased as a used PFC, which was tuned for their FD... for a single turbo etc... but, I did reset it back to the base map (page 38 of the manual), and car refused to stay on. I sent the pfc to my tuner to put a map on their for my FD according to my modifications and still same issue. When my tuner got it, he did say the base map was a little messed up from 1200rpm to 3500rpm but it accepted he's map fine - he opened up the PFC to make sure everything was fine internally, and everything was...

My speed limiter wire was cut from the harness, I reconnected it, but still didn't make a different. I also cut the 4 wires as instructed... no difference. I did however come to the possibility that the model PFC and my harness (not actual FD) are both different models.

As mentioned previously, I did however get my FD to run with my PFC for about 5 seconds running very rough at 500rpm... after adjusting my air bleed valve....

thanks

Dennis,