ratass240

86 na chasis 87 t2 motor everything else seams to be working but i am geting zero spark!!!

Anyhelp?

rnz520

iTrader: (10)

injectors firing? coils plugged in? made sure coils are good?
If all is good and normal, unplug your alternator (both the pigtail and the round charging wire) and crank, see if it starts.
Keep us posted.

satch

iTrader: (1)

Coils are powered by a Black/Yellow wire w/key to on (There are 2 B/Y wires at the trailing coil and one B/Y wire at the leading coil). Check for voltage w/key to on. If the B/Y wire has no power w/key to on then check the 40 amp EGI INJ fuse in the engine fuse box.

Coils need to be bolted to the fender for grounding purposes or they won't ignite.

ratass240

Thanks for the info ill try it tonight and let u know

ratass240

okso i checked everything andstill no spark

satch

iTrader: (1)

You need to make sure that the ECU is powered up as well which could be done by checking for 5 volts on the Brown wire at the Boost Sensor with key to on. If this wire has 5 volts w/key to on then the ECU is properly powered. Wire can be measured for voltage connected or disconnected from the sensor.

Also, the Green/Yellow wire at the leading coil ( same plug where the B/Y wire is) should alternate from 0 volts to 5 volts in repeated fashion w/key to on as the motor is turned over manually by hand. Turning the alternator pulley should rotate the engine. The G/Y wire tells the coil when to spark.

ratass240

My ignition/starter relay is bad I believe is bad so if anyone has one let me know

satch

iTrader: (1)

What part of the relay do you believe is bad?

ratass240

OOk so I now have spark...its weak but should be plenty but still no start

ratass240

It's alive!!! Idles high but im sure its vacuum leaks