You may have seen me post this on other forums because its soul destroying now......
Every Saturday the same spend most of it trying to work out why my PFC won't work. Tried today it drove fine but after it warmed up it went to chaff.
http://homepage.ntlworld.com/steve.connelly/stall.JPG

This is a 10 sec exert of me driving up the drive and it stalling, I'm convinced its the ISCV but tried various all the same how much are new ones :(

Anyone who helps me cure this will get $100 via PAYPAL!!!!!!!!

My car works flawlessly on stock ECU there is something that upsets the PFC but not straight away. I have tried the temp compensations adding/removing fuel nothing works.......It has worked fine for ages then something changes and it stops working, throw in some ideas I have tried most things. Cheers guys.

What's a PFC?

Driving up the drive? Are you talking about an inclined driveway?

Apexi Power FC replacement ECU yes driving up my inclined driveway....it works fine for a random amount of time then starts to stall badly while pulling away anywhere then eventually becomes undrivable.

What have you tried/examined so far?

Could this be an issue taken from a magazine:

If the Power FC is set to work with an APEXi boost controller - but one isn't actually fitted - the engine will constantly stall, or not even start. Mmmm!

Yep I saw the same article its not that unfortunately tried so far:
swapped ISCV countless times
Full Earth strap mod
swapped CAS,coils,MAF
Checked grounds on Loom

I am really having a hard time making out what everything is. What is ISCV? (maybe you mean IAC, Idle Air Contoller?) What is the load reference in the chart above if you already have MAF voltages? I'm assuming your load is off the MAF, since I think the PFC is a piggyback...

It almost looks like you got the revs up and then let off... you're not running MAF-based load and have an atmospheric vented BOV, are you?

It's a full stand alone, here are the manuals if anyone wants to take a look at them:

for engine management
http://www.apexi-usa.com/productdocumentation/powerFC.pdf

FC Commander (editing tool)
http://www.scuderiaciriani.com/rx7/power_FC_manual.pdf


I could be reading it way wrong but it looks like every stall is preceeded with knock and then you're injector duty falls like a rock. Are you using the FC Commander to modify values? Have you modified acceleration enrichment correction?

I'd ****can the whole thing and get something that isn't so problematic if you have been chasing this for a year.

Is a knock event triggering a fuel cut rather than a timing retard??

Thanks for the ideas guys I can't beleive some of you havent heard about the Apexi PFC, it worked a treat on my buddys car of exactly the same year. But last night I tried it again and noticed it was lean so added 5% fuel across the board now seems ok, this has happened before so I'm not going to get too excited. Thing is there is not many decent home tuneable ECU's out there for the MY97....:(

After a week the problem is back again after a 50 mile spirited drive it was more or less fine up until then. The idle is not quite as rock steady on the stock ECU now, what would cause idle problems on the stock ECU although its not a problem it waivers slightly but to be fair I haven't got the o2 sensor connected coz the PFC was running in open loop. ISCV (Idle Speed Control Valve) or the IAC is GB244 how much can you guys get hold of one for ? what would cause the car to go undrivable after being really warmed up then left to cool slightly then warmed up again ?

More then likely, temperature corrections would cause problems after warming/cooling/warming. Mainly because the initial warming probably didn't warm everything to capacity, and the cooling was actually an evening of temperature, then when it warmed up again, it was beyond what the temp was originally tuned to.

Hmmn you think it needs retuning? The water temp sensor seems to be reading correctly.

I could smell petrol a lot aswell the other week no matter where I look though couldn't see any, I used to have a warboro on but then swapped it back to OEM and I'm sure this has had something to do with it i'm thinking failing Fuel Reg?

Well, the Walbro had strange effects on the fuel pressure in some systems due to the FPR not being able to keep up with the increased flow. They'd actually make for a REAL strange curve in the pressure across the RPM and load points in those situations. If you went back to a stock pump, chances are the fuel pressure has changed, and yeah, I'd say that could be part of the problem.

Great I have an fse fuel reg waiting for me at the post office lets see if that helps, thanks for the input guys greatly appreciated!