PCM Question

[3ric85]

I'm doing researching my first stroker and think I've decided on the "poor man's stroker" or 4.6L low-buck stroker. My question is about the PCM. Can you use the factory PCM or do you need to get a different one? also I've read about adjustable MAP sensors, some need it and some don't. I'm stroking a 1994 YJ.

Eric

[604rail_king]

Factory is perfectly fine along with proper sized injectors. As you said an adj map can help fine tune under wot

[Cheromaniac]

Can you use the factory PCM or do you need to get a different one? also I've read about adjustable MAP sensors, some need it and some don't. I'm stroking a 1994 YJ.

I'm running the factory PCM and you can do the same. Just get the correct size injectors (Ford 24lb'ers) and the fuel curve will be very close. I needed to enrich mine a bit further by raising the MAP voltage slightly higher than stock to 5.3v but your results may differ.

[SilverXJ]

I'll echo above. Factory PCM + larger injectors will be fine. If you like fine tune with a MAP adjusted or any one of the piggy back tuners. Keep the cam fairly mild and the PCM will be fine.