i'm just about at my wits end with this motor. i've been trying for the past week to get her started but to no avail.

well i put new plugs in since the old ones have way more than 7k miles on them. while i had them out i found i wasn't getting spark. well, long story short, i both wires going to the coil are getting a positive signal.

after a ton of reading/testing all my relays checked out except some absconded with my meter so i cant check voltages but i'm leaning toward a bad pcm.

if it does turn out to be a bad pcm then i'll just sell off the motor and upgrade.

but any input would be helpful. i would love to hang on to this motor because of the low mileage.

 

Crank sensor?

 

its pre-92 so its only got that one sensor in the distributor. i was thinking about that last night too but i have that back feed running into that sensor

 

"its pre-92 so its only got that one sensor in the distributor"

Hmmm, well that's news to me.

Did you check to make sure that the coil is switching to ground while cranking?

 

Are you sure? Rock Auto lists a Crank Position Sensor and a Distributer Pickup for a 1991 V6. I think there is still a crank position sensor in there.

 

its inside the distributor. when they changed over to the magnums they went with a separate crank position sensor the oem transmission doesnt have the provision for a separate cps same as the 4cyl.

i believe the culprit is the burned up/horribly corroded(though i dont know how it got like this) smec(or sbec) module(aka pcm)

i wonder...how bout a 4cyl 4x4?

 

i love four bangers, and even more I love a japaneese engine in the truck, i think they are Mitsubishi right?

 

Nope, either Chrysler or later ones were AMC engines I believe. 2.2L/2.5L OHC was a Chrysler Engine. I think the only I4 Mitsubishi engine used by Chrysler was the 2.6L I4, and it wasn't commonly used.

 

i learned something, thanks for the info. I feel like the truck would be a slug with the 4 cyl but I'd still ride the thing around, maybe you could rice it out or something, ha

 

joint venture between chrysler and pretty much every company with a 4cyl motor. mitsu was more so with the later 4bangers