OK. Did an mpfi swap a while back. When I first finished the swap, it ran limp mode, redlining at 3200. Messed with some wires for a while and made it work. Then I took out the ecu to try it on someone else's car and when I put it back in it was running limp again. I have re-wired everything and it's all perfect by the book. Throws a code 4 (Crank Position Sensor). Anyone ever experienced this? I don't know what I did to fix it the first time...

Thanks for any help

Rich

 

If its anything like my car you need a (For Chevy's) C.A.S.E learn done. Its a process where the PCM re-learns the crankshaft position. Its usually done by a dealer with a scan tool.

 

I highly doubt that could be it, but I'll look into it. BTW this is obd0. Anyone else have any advice?

Thanks

 

crank pistion sensor in a obd0 car is in the distrubitor.. i think dont hold me against that. try using another distrubitor and resetting your battery and see if that helps the problem. i know on my car there an crank pistion sensor near the crank pulley, but i know on a obd0 car its not there ( i had a b16 crx).. see if changing the dist. works..

 

right obd0 cars dont have a cps.