So I bought a 94 XJ country in Nov. 2021 (do these have an OBD1 port?), no oil when i got it and no gas cap. Put oil in it and got it a cap obviously. Fresh gas (just checked the tank today, no water.) The prev. owner said some critters got in and starting making a nest, i got all that cleaned out. Also said the origina problem was "vacuum leaks". While there are leaks, there are none that should keep it from running this bad.

It ran alright (idled fine but no real power. Doesn't like to accelerate, would lose power when it got warmer) before i put a manifold gasket in, but after that it ran like garbage.

I've replaced my fuel filter, pressure regulator, I have a new pump but havent changed it yet. New O2 sensor, MAP sensor, coolant temp sensor but i need a pigtail for that one.

All ignition (plugs wires cap rotor) was replaced before I did the manifold gasket (ran much better because old plugs were so nasty). and yes the firing order is correct.

Throttle body completely cleaned including the IAC. Need a new one of those maybe as well.


While doing the gasket job i brake cleaned the intake out, I didn't change the injectors however. There were some exposed frayed wires that needed to be repaired so I did but it didn't do a thing. The very back exhaust bolt on the manifold was loose when i took the manifolds off. So something happened from when I changed that gasket but i cant figure it out. Clogged injectors? change F. Pump anyway? When I start it now, it will start but idles so rough it can barely keep itself alive. Any throttle just bogs and kills it. It wont start back up after it dies. acting like I flooded the hell out of it. Everything is tightened correctly on the manifold.

I want this thing to live another day as my daily ****box. Share your thoughts and ideas please.

 

I am experiencing the exact same issue with my 94 SE, done full ignition, gaskets, cleaned throttle body, replaced iac, tps, cps, and a slew of other things that were causing issues. Now I can’t even get it to start lol definitely want to know if you figure out what the cause is

 

Symptoms of a clogged up catalytic converter or exhaust restriction of some nature. Try disconnecting the exhaust from the manifold and see if throttle response changes.

 

This is easier than pulling the exhaust apart.CRUISER'S MOSTLY RENIX TIPS

VACUUM TEST FOR EXHAUST RESTRICTION

OCTOBER 31, 2015 SALAD 3 COMMENTS

Your vacuum gauge should come with an instruction booklet outlining the procedure.

Hook the gauge up to a vacuum source on the intake manifold. Start the engine and note the vacuum reading. Usually 17 to 21 inches of vacuum.

Throttle the engine up to 2,000 to 2,500 RPM for 20 seconds or so and the vacuum reading should stabilize to the same reading you got at idle.

Let the throttle snap shut. The vacuum reading should shoot up about 5 inches of vacuum higher for a second and then come quickly down to the original reading. If the vacuum reading stays high and comes down slowly with jerky needle movements, you have an exhaust restriction.