My car is in the shop right now for tuning,. they are using the APEXi gold software. They are able to scale the injectors but its not responding to anything else, not accepting or allowing them to make any changes,. they tried to reset it, still a no go.
Any ideas? hit it with a wrench? i dunno. I might have to break down and spend 950 for a new one.

 

try yelling at it.

 

i did that while beating on it with a wrench.. no go

 

nobody has any idea?

 

is it a brand new unit?

 

no its older, it came in the car when i bought it, so no idea how old it is..

 

Did they try making adjustments in the Commander first? Did they try resetting the PFC? Did they try using the Datalogit software?

 

+1

and to add, don't just assume the shop knows what they are talking about. There are many so called pro's that are idiots. Not to say they are, but it's very possible they are doing something wrong and just decided to place blame at the ECU. Usually interface issues like this are on the other end, not the ECU.

 

What if some of the Settings 1 Protect switches were set with a DL but the Apexi software can not see them??????

 

they tried making adjustments in the commander as well, and wasnt able too, it connects, but wont make any changes,. They tried to do a factory reset,. still no good. They didnt use a datalogit, only the APEXi software.

 

Well thats strange that it allows them to make changes to the injectors but nothing else. Never heard of this happening. So if they change the numbers in the timing or fuel maps what does it do? I would see about getting a datalogit. Either find someone in ur area that will let u borrow theirs or buy one yourself. Have you tried making changes to it yourself? Or are u going off what the shop says?

 

I am in Iraq, but im going off what the shop says, they have no reason to lie. Im not buying a PFC from them or would they make any money off of me at this point. theyve already raped my wallet,.

 

here what he told me.

"Is not responding to any changes im telling it to. only thing it let me do was scale injectors, and somehow the car runs good, and a/f is good under boost. I have not turned the boost up yet becuase i have no control.

Can you give me any information you have on this unit?

Ive tried using the commander as well as my apexi gold software "

 

Well i'm not saying they are lieing just maybe don't know what they are doing. Or just not quite doing something right. I never just take someones word for it without seeing for myself. Course i do everything myself cause i dont trust any shops.

 

this may be a retarded question. is this a Rx7 or a SR20? I have not seen it in the Rx7 but Power FC has a power off sequence that has to be done in a certain way in order for it to save the file to the E2prom. I experienced this while tuning the SR20 and the accessory wire needs to power off after the main power wire (if I remembered correctly).

 

^ Interesting. I am going to be doing some tuning on a Djetro s14 SR20 PFC soon. Is there any more info you can share about this problem? What are the symptoms and how do you fix it? I think part of the problem is that so many SR20 swaps are so hacked up. The wiring is just a complete mess.

 

I know you can do a search on the sr20 forum and find information on the pfc issue. I don't have enough info on it to really tell you but it is either power wire off first then accessory/ignition wire off or vise versa. it must be done in a sequence. I think if you look at the sr20 wiring diagram, you will find a delay relay either on the power wire or the ignition power wire.

 

I am having a similar experience in my garage. I have the power FC commander and datalogit. The Commander lets me scale the injectors for the upgraded injectors I put in up to 1500cc. The car runs fine in boost with a 12.5 AFR, but at an idle and low RPM runs with a 10.5 to 11.0 AFR. I made adjustments to my injector fuel map to lean it out at lower RPM and eventhough the numbers have changed on the fuel map, there is no change in AFR! I can't figure that out

 

Thats normal for the pfc. Its usually more of an issue when running large primaries such as 850's. The pfc for whatever reason will not lower duty cycle past a certain point, even if the numbers are lower. The fix is to use negative lag, and also make sure the atomizing port is hooked up, it makes a difference. Do a search for negative lag and you will find tons of people with the same issue. Also i don't know how much boost you're running with 12.5:1 afr's but rotaries need more fuel then piston engine cars. 12.5 is safe to maybe 8-10 psi on pump fuel, even then most people richen it up more. By 15 psi you need to be closer to 11 - 11.5.

 

Thanks,
I am running 850cc primaries. and have not been able to lean it out. I will try researching negative lag. Also is their any kind of sequence after I make the change for the ECU to update like hit next then turn the key off then back on or something?

 

No if using the datalogit u either need autosave enabled or you have to write, or write all. If ur using 850's then its def the lag.

 

Sandrock, I had the same problem like you, my car has been rebuilt recently due to blown engine, but now the car been fixed and its ran normal with the standard ecu, one tricky thing is the mechanic from the workshop they swap the power fc to do a retune with dynotune, they found there is a creep when the speed goes up to 3000rpm and the worst case is I have no idea how they do the setting on the power fc and they blown the motor again. I dont know what kind of program they are using to set the pfc. Other than that, Im suspect they are not pro in tuning the power fc and blame on the ecu faulty, well my rebuilt still under warranty so I had free of charge to repair the car.