Best Zc Ecu

Whats the best ecu for a 91 civic auto with a dohc zc???????????

1.) The auto ZC ECU
2.) 88-89 Auto teg
3.) 90-93 Auto teg

1.) The auto ZC ECU
2.) 88-89 Auto teg
3.) 90-93 Auto teg

Right now i have pr4 for 89 teg and it sucks!!!

knw any others i can use??

PS9, 90-91 civic ex auto

umm never heard of that one...That will work on a dohc zc

Yes, its basically an automatic PM6 Si ecu.

Ok I'm Going To Go With The Pg7 89 Integra

Right now i have pr4 for 89 teg and it sucks!!!

knw any others i can use??

pretty sure the OBD0 pr4 ecu was a 90-91 and its a b series ecu..

If the PR4 wasn't on a DOHC motor the car will never turn over....

pr4 on a 89 teg. Yeah that would be a problem. PR4=1.8Lof gas 89 teg=1.6L of gas....
See its running rich! Way too rich. BAD!! Oh and the best one would be an auto 90-91 civic EX-rare to find. or a 87-89 teg auto ecu.

hmm, i have a 90 pr4 on my zc 5spd and i love it, feels better then the pm6. but i guess it doesnt run as rich since i have the bored throttle body to allow more air

I ran a PG7 on my MPFI SOHC d15a and didnt have a issue, better fuel curve and higher redline, no real issues.

Number of cams really dont have much to do with it. Though I dont know if I would run a made for larger (1.8 vs 1.6) ecu.

Gas mixture is controlled by the o2 sensor so there is no real difference in the acutal amount of gas just differenent rpm maping.

I though it gave better midband power.

I thought that the EX was basically a PM6 w/ auto available?

I would run the ZC since it has even richer curve for the higher lift cams, then the integra for obd0 (for 1.6 then 1.8) then a EX.

I confused myself, I meant to say MPFI, sorry about the mix up....

Technically you could run a PM8 for auto too, but that would suck...