civiccord

Ok, i posted on this before but i changed some things. When i bought the car it had a P06 ECU in it, dont know why but it was taching out at 6800. Well i put in a P72 and its still taching out at 6800, why is this??? Even if its not the right ecu, shouldnt it tach out at different RPMs???

bbsIx

what do you mean by "tach out"?

idriveahonda

More than likely he means it is hitting rev limiter at 6800?

A) Your tach on the cluster could be wrong, as they are normally off a couple hundred RPM's up or down compared to what you really are
B) You have some kind of wiring wrong
C) That is what the stock ECU rev limits at

If I remember correctly, a P06 is a 92-95 DX Civic ECU, for the d15b7 motor, in which I believe the rev limiter is at 6800 RPM's. The P28 from the EX Civic rev limits at 7200 RPM's.

Good enough?

bbsIx

p72 is off a gsr right? whoever u bought the chip from probably didnt burn it correctly...if i were u id get a p28, waay easier to chip and u can do pretty much anything with them.

thermal

what is the difference between a chipped P28 and a chipped P72?

civiccord

Yeah thats what i mean, rev limiter at 6800. A P72 which is a GSR ECU, should hit rev limiter at 7200 stock, correct??? Im not sure if this ecu is even chipped, think its a stock GSR ECU. The guy who put the LS/VTEC in told me to get a P72 so i did. So who knows........Any More Ideas???? Thanks for all you guys help.

1rude2l

if vtec does not come in it will seem like it hits a revlimiter at about 7000, but actually the low cam cant go no higher, just a thought

bbsIx

was it a virgin p72? if not i was probably chipped. people choose the p72 becuase of the knock sensor witch during tuning could be had with the p28. and what manifold are you running on the ls block? im not familiar with the b series alot, but i do kno the gsr manifold has secondary butterflys to worry about.

even if your ecu was chipped. its a p72 running a non-gsr block. get it tuned asap. you wont be seeing any problems. u cant just throw a random ecu onto a different block then what it was designed for and expect great results.

civiccord

GSR Intake Manifold......VTEC is coming on from what the mechanic told me, he rode with me. Who can i get to chip the ECU???

bbsIx

did u get the chip locally? or online?. iuno who tunes around here, i kno sohc_mshue does. http://www.shuetuning.com he shoudl be able to help you out. alwys tune your setup, especially a hybrid. basemaps dont cut it.