n2oef

i have a 90 dx that im going mpfi on with a pr4 ecu, d16z6 motor ,distributor and injectors only problem is is starts then stalls immediately yes the fuel pump comes on when i first turn the key on but shuts off real quick also the injectors pulse one time when i turn on the key then nothing.i have perfect spark but no pulse am i doin something wrong?all fuses are good and i have no cel's check engine light comes on for 3 secs when key is turned on

n2oef

any ideas?

Fleas_Ef

bump for some help...

Synth124

Do you need a resistor box for the swap? And if not, go double check all of you wiring for the injectors, from the ECU to the injector clips. Make sure all connections are perfect, check for grounding out. Sorry I can't be much more help.

BUMP!

n2oef

im using the obd1 injectors so i dont need a resistor box right...i've triple checked everything this car is driving me nuts almost like whatever triggers the computer to fire the injectors isnt working.for the second it does run it sounds perfect but i have to turn the key off and back on again for it to fire again

Synth124

I'm not an expert, but why didn't you just do the standard mpfi obd0 swap and then use an obd1 jumper harness? I do understand funding and cost effectiveness is a major issue at times.

mar778c

iTrader: (1)

You have the wrong ecu for that swap. If I understand correctly, you have a obd-1 engine and a obd-0 ecu. This will not work. If I were you I would get a conversion harness (obd-0 to obd1) and a p28 computer.

n2oef

an obd0 ecu will run a obd1 motor i did it for 2yrs using dpi on the same motor....its a problem with the crank angle sensor being in the wrong place inside the distributor.i made the car run by swapping the crank sensor wires with the cylinder positiioning sensor because they are in different positions inside the distributor and it runs except i have the 3500 rpm limit because of the crank sensor code 4 and the timing is a lil retarded but i can drive it and it still has more torque than before....now all i need is a obd0 mpfi distributor like a hf or si.......

n2oef

well finally the end to this thread....i went obd1 because it was actually easier to find a p28 ecu than a obd0 distributor for me...car runs excellant and hauls ***....only bad part was i was too cheap to buy the obd1 conversion harness so i wired in the ecu plugs myself using a chilton manual....wow i hate wiring now-if u do a swap like this do yourself a favor-buy the friggin harness!!!!!