another ECU Question

[TheSilentChamber]

Is the ecu out of a 90-91 teg (non vtec) the same as one from a 90-91 civic/crx Si?

[crxlvr]

i dont think so, but dont qoute me on that.

[marked001]

nope..not sure of the designations.. but a 90-91 teg has a b18...while 90-91 si has a d16..

they're both OBD0 though..if that's your question

[TheSilentChamber]

yeah I know there differnt motors, but sometimes differnt motors have the same ecu. Thanks

[GTA]

they will both plug into your stock harness but they are not the same ecu.

[91civicDXdude]

90-91 integra is a PR4. 6800 rpm rev limit, maps for a 1.8L DOHC.

90-91 CRX/Civic Si is a PM6. 7413 rpm rev limit, maps for a 1.6L SOHC.

all rights and means, a 90-91 PR4 can be used the same as a 90-91 PM6, provided you chip it with the correct maps. the electronics used in both chips are almost identical, so the same chipping method can be used. The microprocessor, however, uses a different codebase in stock form, but this is no problem as you can simply run PM6 codebase in a PR4 ECU.

[marked001]

...but.....why bother? pm6's are a dime a dozen

[travagliante]

The PR4 adds enough fuel for a 1.8L DOHC engine while a PM6 is only enough fuel for a 1.6L SOHC. The ecu is totally interchangable and can be used but with a pr4 on a 1.6l engine it will run very rich!

PM6's dime a dozen? Nope PM5s are def a penny for like 50 dozen..

lol

[91civicDXdude]

Originally Posted by marked001

...but.....why bother? pm6's are a dime a dozen

If you have access to a PR4 and not a PM6...

[marked001]

but you can get a pm6 for like $25-30 on ebay.. so why wouldnt you want your car to run properly, easily..instead of trying to remap a pr4?

cheap ecu's

[TheSilentChamber]

accually curretly on ebay there running above around 80 at time of aution closing.

[91civicDXdude]

[quote=marked001]but you can get a pm6 for like $25-30 on ebay.. so why wouldnt you want your car to run properly, easily..instead of trying to remap a pr4?
QUOTE]

what do you mean by that. remapping an ECU would make the car run exactly like a PM6. not everyone has a rom burner as i do, but i can make a PR4 act like any ECU in a matter of about 10 seconds.. the time it takes to flash an EEPROM.

[marked001]

Originally Posted by TheSilentChamber

accually curretly on ebay there running above around 80 at time of aution closing.

those are all closed auctions in the link I posted....

and 91civicdxdude....ya got me there

[91civicDXdude]