XJ owners....

[JOOP]

Ok WTF is the size of the bolts holding the CPS in on a 90 inline 6, 4.0??

And whats the easiest way to get to this damn thing? I can see the damn thing but just can't get to it..wtf??

 

[JOOP]

nevermind I got it. What a PITA

 

[Cascade_Crawler]

you use a bunch of extensions? :redneck:

 

[Boonie Buster]

pipe bomb:eeek:

 

[TreeClimber]

Jon,

I had a similar experience last week when one of the lug nuts on my car refused to budge. I tried everything! Gave it my best effort for two days! So I reluctantly went overboard and blasted it with a shotgun.

I'm expected to be released from Harrison Hosp on Sat.

Tony

 

[JOOP]

Jon,



I had a similar experience last week when one of the lug nuts on my car refused to budge. I tried everything! Gave it my best effort for two days! So I reluctantly went overboard and blasted it with a shotgun.

I'm expected to be released from Harrison Hosp on Sat.

Tony

:haha: I knew it.



well for the record it is a 7/16's bolt, and you need a **** load of extensions and a swivel head about 6 inches back. :redneck:

The crappy part is the CPS didn't fix the misfire:booo:

 

[TreeClimber]

My experiences with CPS is that they work (and the engine runs) or they don't (and the engine is dead), but that it doesn't create a misfire scenario.

 

[NotMatt]

The crappy part is the CPS didn't fix the misfire:booo:

When does it misfire? At idle? Cruising down the highway?

 

[KarlVP]

Does it have the ECU behind the brake booster? If it does, take that apart. Notice the varnish on the connections. There is your problem. I don't know what year they changed it over. But I had an 88 with that problem.

 

[JOOP]

misses all the time, ilde, whenever.

I've changed injectors, plugs, cap and rotor, and CPS. I'll have to take a look at your Idea Karl.

 

[Cascade_Crawler]

naxja.org is a great resource for all things cherokee especially tech on the 4.0...

 

[CrustyJeep]

Jon, are you throwing more parts at the problem with no idea what the problem actually is? I thought you'd have learned by now...

 

[JOOP]

Jon, are you throwing more parts at the problem with no idea what the problem actually is? I thought you'd have learned by now...

Nope I return them. :redneck: and its only been one part. :flipoff:

 

[Avanteone]

My experiences with CPS is that they work (and the engine runs) or they don't (and the engine is dead), but that it doesn't create a misfire scenario.

X2

And Jon, have you covered mechanical problems? Compression and cyl. leakage test?

 

[JOOP]

X2

And Jon, have you covered mechanical problems? Compression and cyl. leakage test?

I'm pretty sure its an ignition problem. Injectors pulse is off or something. But a compression test is coming.

 

[Avanteone]

Are you working on YOUR 4.0? Stroker?

 

[JOOP]

Are you working on YOUR 4.0? Stroker?

4.0 in a 90 XJ i picked up a few months ago.

The stroker is much easier to work on and diag vs. this damn XJ.

 

[jeephustler]

Asuming you have spark at all 6 plugs, get a noid light set and check for pulse at the injector. Also, I squirt brake fluid on the exhaust manifold just down from the head.. if it doesn't instantly burn off, that cylinder isn't firing/ getting fuel. I've had a couple 4.0 engines with a bad injector that acts just like an ignition problem.

Hope this helps.