i got a 90 dx crx with a b20 in it. i had a b16 in it b4 and had to do the dpfi to mpfi and worked fine b4. tryed to crank it and not getting the fuel injectors to spray any fuel. changed the resistor box off another car that worked and still same out come. the car will run when u spray eitther into the throttle body.. i have fuel pressure and have plenty of fuel so any info at all would help!!!

 

try changing your injectors....maybe the injectors that you have already have a resisitor in them which means that you don't need a resistor box. also try checking your grounds like around the thermostat area.

 

i have the b16 injectors in it and i know they need the resistor box. the yellow wire that gets signal for the resistor box has juice going to it , i checked it with a test light, the other wires that comes from the resistor box also has juice. the wires that comes from the ecu has no juice at all when key is on or turning over. ive ran straight wires from the injectors into the ecu and still same thing.

 

check the fuel injection ground! its the one on the thermostat housing that has two wires going to it. that ground is notoriouse for causing that problem. ive actualy seen them tightened down and still not work propeerly because of them being dirty. take it off and clean it and the thermostat housing where it bolts to and then put it back on and try again. just dont overtighten it as the threads srip very easily

 

check the ECU??

 

Have you even checked if the fuel pump is working yet?

 

i have changed ecu and still same thing. the fuel pump is working i have fuel coming to the rail but not coming through the injectors. how should i go about checking the ecu?

 

maybe its your main relay.

 

i thought it might b my main relay but the fuel pump is comin on and ive heard if the pump is coming on its not the relay. should the wires that comes from the ecu going to the injectors have juice to them when u turn the car over? the 4 red wires from the resistor box has juice going to them and so does the resistor box signal wire.

 

i have this same damn problem any luck on this. i have the injector ground hooked up and i tried a different ecu and main relay and still nothing. any help would be great

 

check your ecu wiring and check all the bay wiring it happened to my friend and it was the wiring a couple of wires were backwards from previous owner

 

havin the same prob

 

ecu wiring good all i added was a boomslang obd1 adapter harness. what two wires did he have criss crossed??

 

bumpp

 

the injector ones i think they are blue and yellow.... and he added ground to the motor and change the main relay...
does your main relay click 3 times?

 

oh yea my car is an si it was not dual point. my relay is good

 

i had a problem close to this and it was my fuse box under the dash, when i checked all the fuses and they were good but there was no power coming out of the fuse box. A trip to the junk yard and problem fixed

 

so what is your fues box craped on you?

 

do you have a wire tuck or did you take the dash apart or anything that couldve messed with any wires? what ecu are you using?

 

yes wire tucked. everything is good.i have neptune rtp. we are starting to suspect the boomslang harness to be the culprit. so we are going to make sure they put all the wires in the right pinouts. my buddy has seen them mess up harnesses

 

there is the problem it probabaly is the harness if everything else is ok then it should be the harness and if you took apart the interior apart make sure you have all the plugs connected