ScikoFaery

Too much toe in an alignment will fix it all

cruiser54

Lots of stuff. Bad plugs, wires, and cap. Dirty throttle body. A sensor out of whack like a TPS.

Loose intake manifold bolts.

When's the last time it had a complete tune-up?

NewKindOfClown

Put your doors back on. You can get a locking Tuffy box, but they make you more of a target. I just make use of my locking glovebox and clean out anything valuable that won't fit in there.

Fog lights work best mounted low and toward the center.

cwabney

I had a similar experience with my '01 XJ. 10 minutes of cold, then warm, musty-smelling air. For me, the issue was the compressor -- if it just needed a recharge, I would expect warm air the entire time.

I believe - and I know someone will correct me if I'm wrong - the issue was in the magnetic clutch that actually engages the compressor. I'm told Sanden compressors (which should be the one on your XJ, unless it's been replaced) are notorious for this. The magnetic clutch overheats and disengages, causing sporadic cooling for AC and defrost. A way to confirm this diagnosis is to firmly tap the magnetic clutch with a chunk of wood (or something non-metallic/magnetic) and see if it starts cooling again. The test isn't 100% perfect -- it didn't work on my XJ, but replacing the compressor was still necessary.

If it is the magnetic clutch, you should be able to replace it instead of the entire compressor. This results in a less expensive fix, but ultimately I read that you'll get what you pay for. Additionally, at the point where you're opening the AC system, you need to collect all the refrigerant, evacuate the line, and replace the dryer. Unless you've got a well-equipped facility to work in, this may be best left to a mechanic -- at which point with the money you're going to spend to get it fixed, it's best to spend a little more and get it fixed correctly.

DieselD

About every other time whenever I start my 99 and don't let it warm up long enough before I drive, it has a lot of hesitation until I accelerate a little hard.

Could this be a dirty/starting to go bad tps? O2 sensor?

XJ=mistress

Hey guys I just changed my oil pan gasket the other day cause of an oil leak that was dropping a fair amount on the under belly. i also decided to go back to my old ways of using 15w 40 oil, I've run it in all my jeep except for my newest one.
Before the change the oil pressure was fluctuating quite a bit from low to high now it barley fluctuates at all, just sits right in the middle and if i floor it just goes to the next small line and then back when i level out.
I just replaced the sensor previous oil change just wondering if thats normal or am i running a high pressure now that the new oil pan seal is in with the higher weight oil ?
Thanks in advanced
98 classic

XJ=mistress

Have you tried seafoam in the intake my 98 was doing that when i got it used seafoam and it hasn't done it since.
Aslo wouldn't hurt to clean the TPS

DieselD

Sure haven't, I'm hesitant on Seafoam. Lol.

I'd be willing to bet the TB could use a more detailed cleaning. I rushed thru it when I put my Spectre intake on.

If I remove the TPS I'd have to recalibrate it or something right? Can't remember.

luckyunblock

I'm looking at putting a zj pitman arm on my 97 Cherokee that has a 4.5" lift. My pitman arm seems to torque my drag bar instead of pushing and pulling it smoothly. I also have an adjustable track bar. The drag bar and track bar are NOT parrell with each other. Would this fix the issue ?

cruiser54

[QUOTE=DieselD;2432762]Sure haven't, I'm hesitant on Seafoam. Lol.

I'd be willing to bet the TB could use a more detailed cleaning. I rushed thru it when I put my Spectre intake on.

If I remove the TPS I'd have to recalibrate it or something right? .[/QUOTE

Do a good throttle body and IAC cleaning. Best done by removing the throttle body and using a new gasket. You can't clean a TPS bTW. It self adjusts on your model.

How old are your plugs wires cap and rotor?

DieselD

Tune up done about 9 months ago, all Accel stuff.

I'll probably clean the TB when I pull the intake to check/clean the filter.

So I can't clean a TPS, and its self adjusting so I could remove it then to help with cleaning the TB?

The IAC is on the TB? Or is that on the manifold?

salad

Side of the TB closest to the engine. MAP is opposite closest to fender.

askingxforxit

Thanks for the reply. I was guessing something wrong with the compressor :/ I'll have to test this later today when it's a warmer outside.

DieselD

Thanks.

I get all the sensors confused.

MAP can be cleaned out too then?

salad

Yeah. I'm doubtful it would really cause your issue in this case but you never know. It's post-throttle plate so it gets filled with all the same crud you find everywhere else thanks to the wonderful CCV