Hi 9 months ago my 94 cherokee was bucking and rpms would fluctuate when idle. Took to mechanic and they replaced crankshaft sensor, ignition coil and PCM. But since mine is a 5 speed they could not find a manual PCM so they put in a PCM for automatic and spliced the purple and white wire from PCM to the map sensor. ran great the 9 months now throwing a 24 code. Replaced TPS and its still doing the bucking and rpm dance and still throwing 24 code. It has to be one of these 3 things (ing coil, crankshaft sensor or PCM). How can I check whats wrong?...Should I also replace MAP sensor? Should I just keep wiring the same and get a auto PCM or take the spliced wire out and get a manual PCM. Any help I thank you.

 

Oh and also when just starting when cold the check engine light wont come on till it warms up then its on all the time till start up when cold again