I blew my original engine (4 cyl) in my TJ. I found a really cheap one out of a wrecked 95 with low miles. I was able to start the 95 before I took it out and it ran fine, it was rear ended by a semi. I swapped them out, which went pretty smooth as far a engine swaps go. My problem now is I have a slight hesitation, almost like it's missing or even bad gas ( but now have ran 2 tanks from different gas stations through it). It does idle just a little rough and I kept the 2000 wiring harness. Here's what's new. Plug wires, coil (2000 - could that be the problem??), plugs, Serpentine Belt, Distributor cap, rotor, Throttle Position sensor, Crankshaft Sensor. All new parts were bought for the 95 engine except the coil. I have checked all vacuum lines and grounds, all seem good.
Any Idea's on what would cause the hesitation? It's not throwing any codes now. It was giving me a P0201, but I changed the injector and that went away. It seems worse in 2nd and 3rd gear.
I am running the 2000 throttle body and exhaust manifold. Now that I'm thinking about it, it ran fine for about 2 days then the hesitation started. I think the only external 95 parts I am running is the coil, cap, plugs and wires. I actually was wrong in my first post.
Fuel pressure, that's interesting. I seem to have good pressure at the rail, but now I'm wondering fuel filter and/or pump? I did notice yesterday the RPM's don't change when it hesitates, which struck me as odd.
my friend is having similar problems 95 4cyl engin in a 2000 only his runs like crap, he also swaped all sensors tb and manifold from the 2000 engine to the 95, so basicly he only has the actual 95 block and head and everything else from the 2000 but what about the flywheel?? doesnt the crank sensor read out off the fly wheel?? are flywheels the same or does it have to be swaped too??
OK PROBLEM SOLVED and boy do I feel dumb. I put new plugs in it when I dropped the engine in and it turned out to be a bad plug! Runs like a champ now. To answer so of the other questions about what I did...
1. Did not need to swap out fly wheel
2. I did make a Mod to the mounts. I used the 95's to fit the block, but I needed to add spacers inside the mounts where it connects to the tub.
3. So it is setup with the 95 block, distributor & mounts, EVERYTHING else is off the 2000.
4. I am in Hampton Roads, Norfolk to be exact.
If you need a Starter, Power Steering Pump or an alternator for a 95 4 Cyl or a A/C compressor for a 2000 let me know :0) Willing to trade or sell out right.
Thanks again everybody and I'm sorry I was a Dumb A&$!!!