I'm building up a V6 finally (my first ) but i want to swap in a manual instead of the auto. Will I need to change out the ECM or swap the prom?

You do not need to change it if the only thing you are doing is changing to a stick. In the auto, the ecm only controls the lock up converter.

If you are doing many changes to the v-6, you may want to look into some programing changes to compliment your engine mods.

Gene

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Gordo, you may wish to change the prom also. It does make a few other differences besides just lock the convertor up. You may find that the car performs better and has fewer perculiarities if it has a straight shift prom. I can't say it's mandatory however. Good luck.

Phil

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87 FIERO GT 2.8 5spd
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87 FIERO CPE 2.5 5spd
86 FIERO SE 2.5 AUTO
87 FIERO GT 2.8 4SPD
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The auto's and the manuals do have different proms. I know, I put the manual one in my auto by accident once. Makes the car idle funny when you're coasting down to a stop.

Shouldn't be hard to get the right one, lots of them out there.

You will have to get a manual wiring harness and re-pin the C500 connector next to the battery. The C500 connector is pinned differently on manuals and auto's because of the park/neutral safety switch on the tranny, add a clutch safety switch, remove the park/lock cable from the ignition switch. It's early, that's all I can think of....Paul