Wasup HT, I have an Obd2b Integra I recently got 2 chipped OBD1 ECUs and a conversion harness and whenever i hook up any of the ECUs I cant rev passed 2-2.5k...

Im getting CEL 10.

at first when I hook up the obd1 ECU it revs fine. Once i go to drive the car it stops at 2-2.5k...

Although when I hook up the original obd2b ECU the car will run fine. I get CEL code 10 still but it will rev and drive normally.

I cant be the only person that has experienced this kind of problem.

 

either the wrong conversion harness or wrong program burned on to the ecu

 

I dont think its either of them Ive tried 2 conversion harnesses one off brand and one skunk2 same result, The ECUs run fine in OBD1 cars.

Thanks for your input.

 

then you have the wrong program for your engine on the ecu, code 10 on an obd1 ecu is an IAT, if that was faulty you would have a code on obd2b as well. there's more going on since an IAT won't prevent the car from revving over 5k

if it's a chipped ecu the obd1 ecu has to be compatible with your engine meaning a vtec ecu for a vtec engine and a non vtec for a non vtec motor. the chip or map also is specific to the exact engine in your car

 

Yea the obd2b also throws that code 10. The chip has all the specifics to the motor in the car. The only thing it doesnt have is the o2 sensor i had that disabled.

 

Does the TPS need to be adjusted, I think i read that somewhere..

 

no, it really doesn't there is no code 10 for obd2

no idea on the tps voltage but a bad or out of adjustment tps can cause throttle issues. it should read .5v closed and 4.5v open. if your car runs alright with the oem ecu your problem is elsewhere, most likely with your obd1 ecu or the map installed.

 

well damn that sucks.. the thing is the obd1 ecus run fine in my 92 hatch with b20/vtec (as far a revving goes)... this really sux ***

Oh yea the car is boosted. on 8lbs

 

what's missing is

"i took my car in for a tune and have the proper size injectors for the hp i'm making"

the fact you even tried to run a turbo car on an obd2b ecu is insane enough. unless you want to turn your motor into a boat anchor don't drive the car until it's tuned. that means find a shop in your area and have it done right

the ecu will go into limp mode when it detects positive pressure. should anyway, you also need a way to vent the motor such as a proper catch can setup. the pcv will pressurize the motor if you haven't done this yet.

 

The obd1 ecu will go into limp mode? I have a catch can on it already. I read that 8psi isnt bad for a stock motor. Why would the car run fine on its original ecu that isnt tuned for boost as opposed to the obd1 ecu thats has boost?

 

it won't run fine on an obd2 ecu, it's not possible. if the obd1 ecu was used on a boosted engine it probably had larger injectors. it may idle fine and run outside of boost just fine but a stock obd2 ecu is not designed for boost and you don't have enough injector to make much more power

you really have multiple problems and need to address them before you melt down your engine

 

Update...

When I first start the car with the jumper and obd1 ecu it will rev fine at idle, but once I go into gear it stop at 2500... And when i turn the ignition off and the turbo timer is still running I can rev it with no problem once i turn they key back on BAM 2500 rev limit... WTF??