hey for you guys that have a p72 chipped, did you do it yourself. i had mine done and its not working the guy was looking for R54 which isnt placed like a p28 would be. in fact i dont think it exists anywayz its not neccasary. so the question is c51 and c52 supposedly arent needed either correct?? but you can use them for noise filtering so it should still work with them in place right ??


they look like 104's ?? in the c 51 and 2 spots.

 

I chip ecu's, if this is a usdm p72, you don't need to worry about r54 at all, just stick .1uF caps in c51 and c52, double check your solder points by doing continuity tests between the pin of the eprom, and the end of the trace on the board. Then make sure the chip you burned is good, and put it in the car, jump the service jumper, and turn the key, if you get a code 0, go back and try again. make sure you check your solder connections on the 74hc373 also

 

thanks ill check those out

 

sorry to threadjack joey, but toolowsol can you do that test with the p28 as well? (jump scc and watch for code)

 

Yes, any obd1 ecu can be tested that way

 

yea you can test it like that but either way itll let you know if its not workin lol. oh well the frickin thing still don't work even after taking it all the way up to carb connection.