01-0720

my friend has a 99 si, the b16 is acting up burning oil and **** so were pulling it out and putting an ls motor in there while he builds the b16, i think hes doin an ls vtec, but anyway, we started pulling the b16 out and the b16 has one plug going into the distributer and the ls has two, theres a coupe othere things

question is what do we do, what wiring harness do we use, what ecu, please help us out on what we need to do to put this ls motor in his si, it doesnt have run perfect, he needs it to get back and forth to school and work for a little while untill his b16 is ready

any tips whould be awesome

thanks for any and all help

runvsofkris

well u might be able to get around your distributor problem if you run a custom ignition which wouldnt hurt if he plans to go ls/vtec anyway.... U gotta run a ls ecu and the motor and ecu has to be obd2, but the si is obd2b..... Why didnt he just save 400 more and buy another b16a2....he might have bought a obd1 motor

01-0720

we figured it out, the plugs were the same it was just the same plug divided into two plugs for some reason, so we pulled the the pins from each and put them back into one, it worked out fine

we figured out everything else

01-0720

ok we got it to start, we used the stock 99 si ecu, but is bogging hard core, wont rev above 3 grand, it keeps missing, we played with the timing a little
he has a vafc on the car, dump question but could that mess with it, i dinno im just trying to think of stuff

any suggestions on what to look for or what to change or fix whould be awesome

thanks

eric

mattssi

This means the car is in limp mode. There are some major issues with wiring i would imagine.Some of the major sensors are either hooked up wrong, or not at all.

cherroneballs

sounds to me like you have a obd 1 engine.
good luck

01-0720

the knock sensor and crank sensor are not hooked for sure would that make go into limp mode
and yes it is an obd 1 motor

StorminMatt

The problem here is that there are several important things that are not connected. For sure, you don't have a VTEC solenoid, VTEC pressure switch, or knock sensor on your LS motor. All three of these are quite important and will send your ECU into limp mode if they are not connected. Also, if the motor is pre-1996, you have no crankshaft speed fluctuation sensor. The simplest solution to this problem would be to get a 1996-1998 Integra LS ECU. I believe the early OBDII cars don't have the crankshaft speed fluctuation sensor (the ITR doesn't). And it will still plug in. But I could be wrong about the crankshaft speed fluctuation sensor. If the LS does use the sensor (or if you get a newer ECU), you will need to get the sensor, along with the OBDII lower cam sprocket, lower timing belt cover, and oil pump cover.