Engine has sluggish acceleration and low power?

Thanks for this post I had the same problem and had to get a new MAP sensor cost me $56.00 I love this site.

At a point of needed some help. I have a 1993 grand cherokee 4.0 automatic. So it all started driving down and it shut off on me. So I thought it's probably same sensors that always go bad. Replaced TPS, IAC, nothing. Checked fuel pressure, it was a little low changed fuel filter, and fuel pressure regulator. Still nothing. Pulled distributer seen the culprit gears were grinded down completely. Replaced that and finally got it started to get it home off the road. Still had a hard time starting would only start when the engine was cool. So inspected plugs and wires found some wires melted together separated and fixed those. Still had hard time starting. Tested some wires from pcm some were good readings some were bad so replaced that. Now starts up how it's supposed to, but when accelerating from a stop it is very sluggish even with pedal floored. It feels like a timing issue but from what I can find the computer on this model and year fixed the timing with all the sensors. So I don't want to keep replacing every sensor on the jeep. Where should I go from here. It drives and runs just slow acceleration.
Parts replaced already are ;
TPS, IAC, CPS, distributor, spark plugs, fuel filter, fuel pressure regulator, PCM, looked over engine for corroded wires, replaced asd relay, fuel pump relay, changed oil, checked trans fluid.

An update on the problem. I changed the catalytic converter just because it was original it did not fix the problem. Some other info to help is when in park and I rev it it works fine until 3,000 rpm's then it'll pop or misfire if I slam the pedal. If I slowly rev it at about 3,000 it'll shake a little and not really rev much higher. When driving if I slowly press the gas pedal it'll drive but just takes forever to get to speed. Once up to speed it drives fine unless I slam the pedal then it just revs up and doesn't go any faster. If press it about half way it'll pick up how it's supposed as long as I'm already moving. This leads me to believe it's a timing issue but I followed the directions in the Haynes for setting the distributor. But everything I find on timing is the computer is supposed to set it on its own. Any other thoughts from anyone.

That was one of the first things I thought of. I checked fuel pressure and I get the correct readings. I changed the fuel filter and fuel pressure regulator just because they were old. Replaced the MAP sensor still same problem. I put Sea Foam in gas tank to help clean injectors out as well. What is weird it was running perfect before I found the distributor gears were ground down on one side. Would the cable to the transmission from the throttle body not working correctly somehow? I can't imagine the timing chain jumped either.

Going to try the compression test next.

Finally got a chance to work on it. After talking with other jeep owners I know and mechanics everything kept coming back to timing. Only problem is, is on the zj toy can't turn the distributor to change the timing. Shop after thinking about it and reading up on things I figured it out. The way to adjust timing on the zj is you have to pull the distributor out and turn the crank pulley and put the distributor back in. Pretty stupid on jeeps part for designing it that way. But jeep is running great after messing with the timing that way. Especially since I replaced about every darn sensor on the engine. I appreciate the help and sticking with me through it. Now it's on to fixing other issues. Jeep-Just Empty Every Pocket.

I have an intermittent problem where I will get no power to start the engine. Once started, it stills run great with 170,000 miles. I have tried replacing the battery and battery cables, but still have the problem. In the past I have always been able to get it to start by wiggling and messing with the cable connections at the battery, and I am still able to do this even after replacing the battery cables. But this is annoying to always have to get under the hood to get it started. Happens about every 5th time I start it.
Any other ideas as to what it could be?

Thanks

The problem is more consistent now. I couldn't get it to start all weekend. I checked again that it's not loose wires. I'm not getting any power to the battery and can't even get it to start with a jump.
Could it be the ignition coil, or something related?

When I turn the key on, I am sometimes hearing the relays click under the passenger side dash.

Engine Performance problem
1996 Jeep Cherokee 4 cyl Four Wheel Drive Manual 140K miles

my 1996 cherokee 2.5td doesnt keep any power on up hill gradients unless I can get a good run up, it will only rev to 3000 rpm in 1st or 2nd then the power drops off. Any suggestions?

Mine doing same thing-told positive battery cable sytem(?) Part costs $300