Derex'7

iTrader: (16)

Okay so while trying to diagnose this sever bucking rpoblem I have, I decided to calibrate my map sensor today, while following chuck's notes I noticed through the diff ranges of vac and boost being applied via air compressor the PIM V never budged.

I plug up the stock sensor same thing, only when I stepped on the throttle, is when the PIM voltage started to go up and this was with the car off. So my PIM V is following my TPS , WTF is going on here, is the PFC in limp mode or something

Banzai-Racing

iTrader: (11)

The PFC does not have limp mode.

Sounds like you have a wiring issue. The TPS and MAP share the same 5v constant br/w wire, that is where I would start looking.

Derex'7

iTrader: (16)

Yeah I'm 0 for 2 on these "Single turbo harnesses" that came off of good running cars....Hah!!!

Derex'7

iTrader: (16)

Okay well I pulled the harness and checked for continuity on both the F and EM to the MAP connector and they all matched and checked fine. So can it still be an wiring issue and if so how? I'm going to plug up a known working map sensor this evening from a friend and test his out.

I ought to mention it does this plugged or unplugged as well, it doesent matter its as if the MAP sensor is not there. As I apply throttle the PIM voltage increases and if I unplug the TPS all together the PIM voltage will max out as so will the VTA value....Seriously WTF is going on here???

Derex'7

iTrader: (16)

this is driving me insane, I'm going to try and post a vid of my problem

Banzai-Racing

iTrader: (11)

Do you have access to another PFC you can swap in to verify that it is not something internal?

Derex'7

iTrader: (16)

Yeah I'm going to swap my pfc and map sensor in a friends FD....If it does turn out to be an internal issue w/the pfc. Can I send it out for repair?

arghx

iTrader: (3)

if you send it out to Apexi they put it on a boat to Japan and you won't see it for months.

Derex'7

iTrader: (16)

HAHA yeah F&%k that....I mean are there any stateside dealers? Banzai or I heard something about rotary performance services these units

Banzai-Racing

iTrader: (11)

Apexi does the repairs to the PFC.

Derex'7

iTrader: (16)

Ok so I'm trying one more thing before I throw the towel in...Ok so I figured since I cant seem to find anything wrong in the harness wiring and the only thing wrong w/the PFC unit is the PIM voltage reading.............................

Well let me try the APexi 3 Bar map sensor harness which plugs directly into the 5 pin port side of the PFC thereby bypassing the wire harness totally. Also wouldnt the sensor be running off a different drive in the PFC?

Already ordered the $15 harness anyway, figured its definately worth a shot you know

Derex'7

iTrader: (16)

FYI I did find the culprit and it was indeed an internal issue w/the Power FC that I bought from "ILOVEJDM". Nohing wrong w/the single turbo harness nor my map sensor.

cewrx7r1

iTrader: (2)

There have been a few people who have sold bad PFCs thinking that the new owner would not discover.

How can that be?

Derex'7

iTrader: (16)

Yeah tell me about it. Im creating a thread detailing the entire transaction. I wasnt the first person he got with this bad pfc neither.

Now Im stuck with a 700+ dollar paperweght...

RaceTUNE

If you need your Power FC checked.

Frank@GarageBOSO.com

www.GarageBOSO.com
www.Racetune.net

Derex'7

iTrader: (16)

Thanks but no thanks unless you all do actual "repairs", but I've done already checked, rechecked and thoroughly diagnosed the entire map sensor, connector & harness & it's w/out a doubt an internal error w/the pfc. I dont need it checked, I need it repaired and/or replaced or my $750 in CAD back from ILoveJdm aka Adrian Ahmadi

Derex'7

iTrader: (16)

For full details please chaeck out the thred here https://www.rx7club.com/bad-fugly-members-185/buyer-beware-ilovejdm-aka-adrian-ahmadi-969874/