1991 S10 2.5 ,4x2 5 speed
My truck has a lack of spark getting to the plugs.
I've checked all the fuses, replaced the coil, rotor,
distributer cap and ignition module. Started out as
an intermittent problem, now it cranks with no
response. Hopefully someone can help before I
pull the rest of my hair out.
Did you check primary voltage to ignition coil? Pink wire should go hot with key on, maybe fuse protected. You dist rotor turns when you crank it? You may need to check pick-up coil in distributor? Any applicable trouble codes?
I don't have a code reader and I have replaced the fuel pump and the relay. The battery and the alternator are fresh. Thanks for the heads up on the coil voltage, I'll give that a shot asap
You don't need a code reader. See the datalink connector, should be lower edge of dash, left side of steering column. Use a jumper wire between terminals A and B, turn the key just till the dash lites come on, then the mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes. I've seen older vehicles where the check engine lamp no longer worked, in that case, you can't check codes.
Thanks Oilyspill, the distributor coil pick up was the problem. I have replaced it and my little red rocket is rolling again. 442,800 km.