ok so i have a 90 civic hatch which i put an ls motor in. its all OBD0 and i converted to mpfi. wiring for mpfi is good, triple checked it. it gets fuel but no spark. i tried a known working distributor and ecu and still nothing. no codes are being thrown, but after about 5 seconds of cranking the check engine light comes on, but the ecu light is solid, not flashing codes or anything. grounds are all good, just no spark. could it be a shorted out wire you guys think? the car itself has about 225,xxx miles on it so thats a good amount of where on the engine harness id think. thanks for the help

 

ttt

 

Double check the positions of the two white wires on the engine harness at the distributor connector.

 

those are correct. anything else?

 

try a diff dizzy

 

tried a working dizzy already

 

Does the check engine light work? Does it come on for 2 seconds and then go out and stay out does it stay light solid from the minute you turn th key. Or does it not come on at all? Are there any stored trouble codes? Did you paint the head/ block/ dizzy? Engine bay grounding points? Is the engine well grounded? DO you have power at the black/ yellow with the key in the on/run position? Is the 8 pin connector on the passenger shock tower well connected ?

 

the light works yes. it goes on for 2 seconds like it should and goes off, then after cranking it for about 5 seconds the light at the ecu goes solid with no blinking. no codes thrown. grounds are all cleaned and on bare metal, no paint. i guess my option is to check wires for a break cuz ive pretty much covered everything else

 

ok so still need help with this :/ i just checked all my mpfi wiring with a multimeter and its all good. all wires to dizzy are getting power, but ecu still keeping a solid light. got a new working ecu and it does the exact same thing. is there somehow the ecu could be shorting out? any grounds to the ecu i could check? please help...

 

ttt

 

have you tried different spark plug wires or new spark plugs?

 

sparks plugs and wires are new

 

do you get any spark when you take the spark plug on the wire against a ground at all?

 

very rarely. when cranking it it seems to try and catch, like its sparking on one cylinder

 

do you think your firing order is correct? try to see if its in the right order

 

firing order is correct

 

is the battery fully charged? when you try to crank it does it die?

 

battery is fully charged. same battery i used in my DD

 

im sorry i dont know what else haha it might be your ecu or harness is messed up somewhere. sorry i couldnt contribute

 

well thanks for the input

 

fuel main relay,.....

 

its getting fuel, main relay is new and working

 

ttt

 

???

 

ttt