phat87mazdarx7

I've searched and searched for weeks several forums and nothing has worked so I joined here to see if anyone can give me some pointers..

I just recently bought a 88 cherokee for 400 bucks with 183k, it had a brake issue where it was locking up the drivers rear wheel(parking brake equalizer was sitting in the drum loose) so new shoes, new hardware kit, brake adjuster kit(none of it was there, lol) and new springs for the bar, and new parking brake cables. anyways I've got about 800 in parts in this thing and took it for a ride and boom, death wobble, fixed the drag link and the tie rod on it, and everything else was tight, and its better but I still had looseness on the actaual steering column shaft u joint, so I gotta fix that with a used one from the junkyard this weekend. Im assuming that should cure my death wobble. Right??

then my other issue... This car was never maintained Im assuming, so... It recieved a full tune up, Plugs(gaped at .30 or whatever it said under the hood), plug wires, cap, rotor button, di-electric grease on all the terminals, a new(used) injector... one injector wasn't firing so I pulled them all out cleaned them all wiping them with carb cleaner then took a 20oz bottle and filled it up with fuel injector cleaner drilled a hole in the cap and stuck a fuel line in it and attached it right to the injector and squeezed and gave them power(some sprayed weird but cleared up shortly) and back flushed the injectors too. and put it all together with new o-rings and vasaline.. it runs like a freaking top now, sounds great and pulls hard!!!! till you drive it, then it wants to pop in the intake and like stall no misfire I dont recall but definitely runs bad.. so I pulled the cap off the rail and pushed the bleeder valve and really low pressure.. so new pump and sending unit(since the gauge didnt work) I pulled the old one out.. its a rusty nasty mess.. and the fuel is even brown.. so cleaned up what I could feel in the sump and put it all back together.. and it runs great and drives great now, until it starts warming up. then the hesitation is back and it wont move out its own way and will barely put up a hill... I saw a few people mention the O2 sensor since other people had issues after warm up, so I unplugged it to run in open loop, took it for a drive, and ran like normal then when it warmed up, hesitation was back. so its not the O2(though I'm sure its probably never been changed like everything else on the jeep) but I'm tired of spending money and still cant really drive it.. any one have any ideas??

Its an 88 cherokee 4.0 automatic 4x4, when i got it I noticed it had the wrong radiator(it had a radiator cap) so from info from this forum and others I decided to completly trash all the old stuff and upgrade to the 92+ style so i got rid of the pressure bottle thing and replaced it with a overflow from the auto parts store new radiator cap as the old one was pushing water out the overflow(bad spring), put new heater hoses and got rid of the leaking heater valve, got a newer water outlet with the sensor since it had no sensor attached(since its supposed to be on the radiator) and universal fan hard wired was trashed for a used stock one, and everything was extended and wired up and fan works great(but it has never got hot enough to use it, runs about 200-205) it has a brand new fuel pump with the sender(previous one didnt build enough pressure and whined really loud) new pump builds the pressure(visually inspected from the bleeder on the rail) but it whines pretty loud and is annoying too :/ the exhaust was a hacked up mess, found a good used stainless looking one in the junkyard(muffler back) and its running catless right now(sounds good ) engine wise i cant think of anything else but heres the list of everything I've put into it:

radiator cap 5.99
overflow bottle 9.99
5/8 hose 4.17
5/8 hose 4.17
3/4 hose 6.46
flush kit 3.99
idler pulley 15.99
1/4 screws 3.29
valve cover gasket 5.99
water outlet gasket 2.29
spark plug wires 22.69
spark plugs 16.44
distributor cap 12.99
dist rotor button 11.99
thermostat 7.99
brake adjuster L 9.49
brake adjuster R 8.59
hardware kit 8.09
u-joint 13.09
front pads 12.99
rear shoes 24.49
oil for rear end 11.98
engine oil filter 0
enigne oil 12.97
silicone 7.49
radiator fan 23.2
wiper arm 4.05
thermostat housing 5.63
visor clip 1
enviro charge 2.35
Brake parts cleaner 7.41
Lugnuts ebay 15
parking brake cables 21.98
parking brake springs 1.69
overflow hose 4.95
pvc valve elbow 2.59
pvc grommet 3.29
nuts for bumper 3.29
injector seals 4.49
blower motor 28.99
blower motor resistor 23.99
muffler 14.01
antenna 3.28
bumper brackets 13.64
bat tire good aluminum rim 20.33
dome light cover 1.35
seat belt connector 4.28
exhaust pipe 20.97
hanger 2.99
speakers 25.76
tires 40+10 gas 50
tires mount+balance 52
fuel pump 104.09
drag link 24.29
tie rod end 15.59
oil 12.97
gas treatment 1.57
fuel injector cleaner 1.88
dome light 3.97
foot light 3.97
radio connector 9.72
driver wiper 4.97
rear wiper 4.97

Subtotal 794.11
Tax 55.5877
Total 849.6977


does anyone have any ideas what this hesitation could be or what and how could I check stuff, does the knock crank and cam sensor work like the O2?? unplugg it and it just bypasses that system but will still run. I just need to get this jeep on the road.