Hammloaderman

Hey y'all does anyone know if the ECU is the same for an 86 2.5 renix as a 90 2.5? Jy guys it's different but I thought it was the same

On flat ground? Do you remember what gear you used? And approximately how much distance did you need to get it up to speed?I always used first gear, never really had to get her rolling all that fast and yeah I could do it on flat ground, it worked fine in reverse too iirc

The starter went out on me back when I owned a 90 comanche 2.5 liter 4 speed and I could roll start it pretty easily by myself

Ok guys so ive changed the cps, fuel injector, tps, map and about half the vacuum lines now and still having problems. I'm completely stumped at this point, she's down to only running about 10 minutes before it cuts fuel and dies any other suggestions? Currently working on finding an o2 sensor to try

Hey guys I think I'm having some problems with my tps on my 86 2.5 liter, was wondering if I could swap the whole throttle body off an 88 2.5 liter, would I be able to use the newer tps?

Chance, 86 4x4 2.5 auto south of topeka ks a little ways, been down a few minimum maintenance roads but nothing extreme. Once I finally this old girl running reliable I'd love to go to some real trails

Hate to revive an old thread... But I have the one year that none of the tips on this page seem to match, I have an 86 comanche 2.5 auto 4x4 that I've been having problems with and I believe I've narrowed it down to the tps, mine as I'm sure you know does not have 2 connectors, is there any other vehicles I could rob one off of to test and see if it is my tps that's causing me all this grief? Before I spend the 70 bucks to buy a new one

Seeing as it's a Cat light I would assume it's 24v, especially being the older halogen style they switched to HID and LED when they started using 12v for the chassis wiring on cat equipment

Update on the comanche, I've been driving it back and forth to work long as I don't shut it off I'm usually ok, it's not running rich anymore, went from 8 mpg to around 33, then back to the mid 20's, haven't had access to a fuel pressure gauge yet but I did find out that when it's all the way warmed up when it starts running bad and won't restart for several hours I'm losing spark, going to pull the cps tomorrow and clean it, and I plan on checking the ICU and the cps with a meter to see what they read

Anything in particular I should look for? Did some GM cars use better injectors then others

Making a run to the jy tomorrow, was wondering if the injectors from any other vehicle fit the 86 2.5 liter? Also do any other radiators swap in fairly easy?

Super rich generally leads to the MAP sensor and/or it's vacuum source being wonky. I pulled the electronic plug off the map sensor and it immediately died, restarted it and pulled the vacuum line off which made it run like I'd pulled a plug wire off, the vacuum line had crazy suction on it too

Thought I had the old girl running alright so I decided to make a run to the lake since the weather was so nice today. Discovered rather quickly that once she gets warmed up all the way, half hour or so, she's back to spluttering and running super rich, all the important vacuum lines look to be in good shape and I noticed that the fuel pump is making alot more noise than before, possibly because it's pumping so much fuel?

Does any of this apply if you have the keys but the door won't unlock?

On a side note, if I was to swap heads on this what years will fit? And someone on another thread mentioned that the block on the Dodge Dakota 2.5 was the same as the AMC 2.5, is the head the same too?

Finally had time to finish putting the valve cover back on, the pcv valve was packed completely full of oil sludge as was everything else, beginning to wonder if this poor thing ever had an oil change before, seems to run better now with a new pcv valve and replaced the rubber hose connected to it, cleaned probably 2 pounds of gunk out of the rockers and pushrod holes

Build date 11-1985 Unsure of axles or T case 3 speed auto 2.5 litre Rusted and busted but runs and drives Currently located in Osage city, Kansas owned by me Chance Sumner

So, I'm not much of a mechanic but I figured a valve cover gasket was well within my scope, what exactly do I do with all the $#!& built up in there? I'm surprised the poor thing was even running, the valve cover was half full of gooey gunk

In the process of refreshing all the grounds and changing the valve cover gasket as Chilton's told me my problem was a vacuum leak, is there any way to test the ECU or O2 sensor?

I recently bought an 86 with the 2.5 auto 4x4, ran great for about 3 weeks now is running crazy rich and won't start about half the time before I just start replacing things hoping it works does anyone have any ideas?