I bought a Pettit ECU and noticed that the Pettit seals were torn, indicating that the ECU had been opened up before. I took a look inside and none of the chips say Pettit on it but two chips have a reflective metalic tape with writing on it. One chip says EXE on the metalic tape and the other says WKS. I've attached a picture of it. Does this look right? I dont remember ever seeing a picture of the chips inside a Pettit ECU before.

 

Don't peel off the tape. UV light will destroy the program in the ICs.

 

Thanks for the tip. I'm not planning on peeling the tape off or messing with the chips at all.

 

That looks right, just standard EPROM chips with sockets soldered in. The stock ECU configuration doesn't have those sockets or the riser board, the stock chips are de-soldered and that's all put in.

 

Thanks

 

Wan send a PM to hwnd, he's poked around in more ecu's than almost anyone on this forum.

 

Thanks! I couldnt remember his name or I would have asked him instead of making this thread

 

Hwnd should have some info on that ecu for sure, i was talking to him about Pettit's chips less than a week ago

 

PM replied

That is in fact your standard board for "chipped" ECU's (specific to the FD3S 8bit).
Oddly enough it's the "map" / ROM-data is based on the N3A7 JSpec ECU.

Seems a lot of those "chipped" ecu's, they copy (read 1:1 copy) the ROM data but I've hardly seen anyone with their own custom ROM (I've yet to see anyone modify anything but rpm limiter, speed limiter, fuel & ign). I've got a lot of research into this and disassembled a lot of the code.

I'm working towards a "single turbo" stock ECU (when I have free time).