:::RHMT::: Real Home Made Turbo
General Category => Engine Management => Topic started by: hamburgler on June 20, 2009, 06:06:37 PM
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Im no newbie to chipping. Ive done lots before but never a P75. I have just finished chipping one. The car starts with a solid CEL and only revs to 3000rpm. Time to trouble shoot.
So basically there is no R54 to solder in a resistor and R52 is blank from the factory.
C51 and C52 will get will get the yellow capacitor (0.1uF) #104, J1 will be jumped, J12 cut, CN2 (pins 1-4) will get the logging header). Whats up with pin R52 on the P75 ECU? Just leave it blank?
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DId you test the ecu before you chipped it? Cut j1 to confirm it's not a bad ecu to begin with.
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Poorly flowed solder joints cause that problem. Poorly flowed joints also cause CEL with J1 cut. Happens to all of us, I murdered one last week trying to replace an old school RTP board with a socket. Try to reflow and see if that works.
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Ya its tested. I cut J1 and its all good. I then re soldered it in for the external ROM.
Whats also messed up is that I forgot to put a chip in the socket, primed it, solid CEL, and started the car and it ran good. Ya so I dunno. J1 is definitely good though. Doesn't rev above 3k.
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I just did a P06... same thing. Fail. I'm shuttin her down for the day. I'm starting to think the stuff I got from my local electronics store is bunk. Every kit I've ever bought has worked. Now that I'm doing lots of ECU's I can make my own kit for like $5 and thats what I have been using on the last two.
Does anything change with a Canadian model (P06-C01)?