2.5L I-4 engine problems

Vehicle - 1985 Jeep Cherokee Pioneer.
Powerplant - AMC 2.5L Inline 4 cylinder.
No modifications.

Problem 1-
sometimes, my xj will run like a top. sometimes, if you let off the gas at a stop, it dies. it sputters out and runs like crap. ive re-built the carb, re set the electric choke, and checked everything. is there a senser thats bad? Has anyone else had this problem?

Problem 2-
high oil pressure. im reading almost at the last line of the gauge. i had the wrong gauge in mind. i had my water temp insead of oil pressure. the oil pressure is reading about 75 or so. maybe a tad less. is that a bad thing?

any help, imput, etc. would be wonderfull.

ive also been thinking about pulling the engine and swapping a 4.0L in there. anyone do this? ive pulled and replaces engines before, but they were the same size. is there any complecation with going to a bigger size in an xj?

um, thats your temp gauge if its going to 240.....

and yes, if its going to 240, thats bad....

my bad, i havent been in my jeep for a while the temp is fine. the oil pressure is reading about 70 or so.

LOL...ok, so your temp is around 210 then?

Oil pressure is kinda high....what oil brand and type are you running?

yeah my temp is around 210.

my oil is delo, and im running about 10-40 weight.

did it just all the sudden jump up to 70? or always run that high? if you went to 10-30, you might go down a bit in pressure...

no its been that high since we bought it. like three months ago. and ill try that. thanks. thats one down.

oil pressure is normal.... about 70-80 ish while driving, and about 40ish at idle...

as for dying, check the egr....