88 Comanche 2.5 won't Run

[Oly]

so my 88 comanche daily driver has been doing great but lately ive had some random misfiring issues. mainly when it was cold. today i pulled out into traffic and when accelerating in 2nd gear just dies. i restarted idled up then choked out and died again. this happened 3 or 4 times. now when i crank it over all it is doing is sputtering and popping back through intake. plz help my poor truck

[Guest]

Sounds like it could be a clogged throttle body and or the injector itself is going out.. When was the last time it had a general tune up (wires, cap & rotor, plugs). Could be that the engine's timing is also off. Just something to think about. I'm sure someone else will chime in with something more helpful than I've given. (Shouldn't be up so late on CC anyhow, lol) 

[Oly]

she just got cap rotor plugs wires about 2 months ago. low miles on them. fuel pump sounds to be working. no work has been done on timing chain and i don't think she jumped teeth. bout 206,000 on motor. I'm wonderin maybe distributor pickup or distributor itself. could the ignitor/ignition control module cause this? i don't think its a fuel problem i don't think that would be the cause of it popping back through the intake.

[Eagle]

CPS?

[Jeep Driver]

I also have the 88 2.5.

 

If you want it to run right.........

 

 

Systematically go through and replace EVERY sensor, clean every ground and connection, add grounds.

 

Try to find Denso, Elchin, Standard, stay away from BWD...........also consider NAPA Premium parts such as brass distributor cap and rotor.......Belden wires are good also.......

 

 

 

I had a fuel pump relay that would go out intermittently also.....similar to what you describe........but I agree with Eagle........start with CPS.

 

 

 

 

BTW........what I stated above......will run you about $350 and will take about 9 hours worth of work if you did it all at once.........best money and time you will spend.

 

 

 

Also, clean up your engine bay and engine, cleanliness really is next to godliness.

 

 

Go to Cruiser's Renix Tips to learn about how to go through your electrical system.

[Oly]

i really appreciate the feedback guys. i wonder if theres a way to test my sensors with a multimeter. does anyone have the specs on resistance and stuff through all those sensors? also i work at oreilly auto parts and i did just put borg warner on for my cap and rotor.

[HOrnbrod]

http://www.lunghd.com/Tech_Articles/Engine/Basic_Sensors_Diagnostics.htm

[Oly]

thanks again guys for the replies. here's the latest. went out next morning was cranking it over no fire. i moved a bunch of wires around including cps wires. pulled plug #1 grounded it out the see if i was getting spark and she ran on 3 cylinders. put the plug back in had a rough start but then ran great and she hasnt skipped a beat last 2 days.....

[cruiser54]

Click on the link in my signature and do the ground refreshing, connector refreshing, and C101 cleaning. You just pointed yourself in the right direction.