Recently I have done some work to my 91 wrangler 4.0.
Brute force cold air intake,
both throttle body sensors.
Here's my dilemma.
After installing my CAI system, the proper way, it ran for about five minutes. the influx of air caused my already gunked up air/fuel sensor to go so I replaced them and sprayed a little starter fluid into the spark plugs and got the jeep running because I couldn't just start it the regular way, ran fine for a day. (driven at night).
Last night I ran it HARD and I didn't have any issues. Throttle response was fantastic, sounded like it was breathing great and had no issues at all. Just two hours ago I took it out for a small ride around the block and it seems everything is happening again.. I haven't done anything to it since last night driving or even starting it wise.
Signs and symptoms....
Mainly started after driving for a few minutes..Both time the jeep started to sound like a helicopter and chugging air bogging down my engine. I'd let off the gas and let it try to catch itself but no. It died trying to make it back home, can't even get it to idle anymore or even start... My starter, battery, and all other key items to get it running seems to be just fine..
I let my TB soak in acetone and clean all the gunk out and replaced the sensors, that's what fixed it the first time..
I did have to spray some starter fluid into the spark plugs to get it to start but I didn't think anything of it, just that it needed a little help.
I thought it was the CAI with the massive cone that it has but I reinstalled the stock intake and it didn't make any difference at all.
I've researched cracked exhaust manifolds, blown engines, bad timing belts but I really can't get a good feel on what to do or where to really start looking.
I've looked around but haven't really noticed anything significant.
I haven't attempted to start it again cause I don't want to damage anything more than it may be already..
I am kind of thinking fuel related but I really have no clue