Replace ECU 89661-12770 with 89661-12420 ?

[munkey]

will it still ruin the car?

[wa5]

I am guessing you are talking about some kind of Toyota.... could you be a teensy bit more specific?

[Hiro]

89661-12770 = silvertop 20V AFM ECU
89661-12420 = smallport 16V MAP ECU

Short answer, no.
Long answer, definitely no.

Or, to specifically answer your question

will it still ruin the car?

yes it will "ruin" the car

[munkey]

89661-12770 = silvertop 20V AFM ECU
89661-12420 = smallport 16V MAP ECU

Short answer, no.
Long answer, definitely no.

Or, to specifically answer your question

yes it will "ruin" the car

ok

I ment 'run' as in will it even start the car?.. Not 'ruin'

[Hiro]

ok

I ment 'run' as in will it even start the car?.. Not 'ruin'

I know, but the point still stands. A smallport computer will not run a 20v, especially a silvertop.