Recent content by CpnJack

Hey Everybody. Since last post jeep has been to the stealership where they worked on it for 4 days and called me to give up. Fortunately, they didn't try to charge me, they were actually pretty cool about it despite not being able to figure it out. Threw a few more parts at it included O2...

Thanks. I looked up EGR and I think they stopped using them in 1990. The link is cool though with all of the test info in one place and straight to the point. Wish I had that a couple weeks ago. Jeep is actually at the mechanic now. I'll post up when/if they figure it out. Just hope the hole I...

Tested the MAP before cutting the exhaust. MAP tested at 3.96v but spec is 5v at op temp. Swapped in a new MAP drove it and problem is still there. tested the new MAP and it also showed 3.9v. Was able to exchange the MAP for a MAT (or IAC). The orig MAT was testing at 1890 ohms but spec is "less...

Checked it, no bolts. The exhaust is all welded. Guess I'll just cut it then use those muffler brackets to hold it back together till I get someone to weld it.

hadn't been ignoring the suggestions to check the Cat just wasn't sure how to do it. Did a little research and looks like easiest most accurate way to test would be with a pressure gauge screwed into the 'upstream' o2 sensor (no downstream sensor on 94 xj anyway). Going to see what AutoZone has...

Well, traded the xj in on a 4 door JK....yeah right. Any how, installed the o2 sensor and at first it ran perfect, but then it always ran fine when the engine was cold. At op temp still had bogging and lunging at same RPMs as before but seemed to be less exagerated. Parked it and disconnected...

Tested o2 per http://www.naxja.org/forum/showthread.php?t=1012701#post244627859. Only I used a digi VM because that's what I have but post calls for analog. The voltage ranged from .1 to .3 volts with engine at varying RPMs. Don't know if the digi VM nulifies the test but figure I've thrown...

Checked the CTS. It tested fine but reminded me of a sketchy splice I did in the wiring from the CTS a few years ago. There was some scale on the wire kind of like on a battery terminal. I'm thinking the splice may be bouncing loose and causing inaccurate readings. Going to mend the wires, test...

Thanks for the ideas. I'll check out the O2, temp sensor, and look for bare wires. Question though, didn't I test the O2 sensor already when I disconnected it and the problem remained roughly the same?

I've been chasing a problem for a while. Here's the details. -94 xj 4.0 5spd 4.56 gears 210k miles -symptoms: Runs fine until operating temp. At op temp consistently bogs at apprx 3-3.5k rpm (25 mph) in second gear with throttle wide open. Jeep pushes through bogging and eventual acclerates...