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#1 Re: Jeep Cherokee XJ Mechanical Questions » 89 Jeep Sport w/4.0 engine » 09-21-2015 07:40:56

Its been looked at many times, and every answer you could think of has been thrown out here, none of which have cured the problem.

No further discussion is needed, at this point it just isn't worth any more "fixin".

#2 Jeep Cherokee XJ Mechanical Questions » 89 Jeep Sport w/4.0 engine » 09-16-2015 14:48:47

Replies: 8

I'm looking at an 89 Jeep Sport with the 4.0 engine. Does this engine have any known problems? What should I look for overall?

#3 Re: Jeep Cherokee XJ Mechanical Questions » 98 jeep xj highe idle » 11-01-2012 07:27:16

I have also dealt with this problem on-and-off on my 98. The three things that pop into my head right off the bat... a vacuum leak from one of the hoses coming off the intake manifold, a bad Idle Air Control Motor (attached to the throttle body), or a bad Throttle Position Sensor (also attached to the throttle body).

You could try resetting the Powertrain Control Module and see if it come right back. Flashing the PCM will reset the computer back to the factory settings and let it "re-learn" as you drive it for the next 50 start-ups.

Procedure can be found at the following address: … cle-89.htm

#4 Re: General Jeep XJ Cherokee Forum » Check Gauges question » 03-01-2012 21:40:17

may be as simple as ur battery not being grounded or terminals
loose/dirty/corroded. have u checked those?

#5 Re: Jeep Cherokee XJ Mechanical Questions » symptoms » 10-28-2011 08:23:31

check exhaust back pressure , could have a catalytic converter going bad,  works ok cold but when warmed up after running a while restricts exhaust

#6 Re: Jeep Cherokee XJ Mechanical Questions » Will Not Start » 09-28-2011 16:14:17

Your first guess was right, it was the crankshaft position sensor.

#7 Re: Jeep Cherokee XJ Mechanical Questions » Will Not Start » 09-28-2011 16:09:02

As I stated the engine turned over Ok so was not starter or battery.  It was a faulty crankshaft position sensor.

#8 Re: General Jeep XJ Cherokee Forum » Cherokee MPG » 09-28-2011 09:26:51

Well I have a 90 cherokee laredo, 4x4 4.0 auto, combined I get about 18-20, straight highway at 70 I get from 22-24 depending on the terrain. I guess I should be happy huh?

#9 Jeep Cherokee XJ Mechanical Questions » Will Not Start » 09-26-2011 19:54:58

Replies: 5

1996 Cherokee, 6 cylinder, 4 wheel drive. Drove vehicle for about an hour.
Parked it and tried to start later. Engine turns over Ok but no will start.
No ignition. Thought it was coil and replaced it but still no go. When you
place the key in the steering column there is a buzzer. When turning the
key to start, but not causing engine to turn over, you can hear a click
which seems to come from the rear of the engine on the passenger side. When
this happens the buzzer stops and there is no power to the coil.

There are several relays and fuses in a box but all check out OK. The click
we hear does not seem to come from this area although it is not very loud
and difficult to pinpoint. There does not seem to be any question though
that what ever clicks is causing the buzzer to quit. Any clues as to what
is causing the problem,

#10 Re: Off Topic Discussion » Gas Guzzler » 08-17-2011 15:10:00

When I was looking for a VW TDI a few years ago I came across a shop somewhere off the 91 that had people in Arizona and other places that would buy the new TDIs, drive them for 7500 miles and then sell them to this shop so they could sell an almost new TDI in California.  Starting in 2009 (I think) the new VW diesels will be 50 state legal.

#12 Buy / Sell / Trade » Jeep Stereo » 06-15-2011 11:24:19

Replies: 0

For anyone that is interested, Fry's electronics is selling what may be
the perfect stereo for a jeep on close out pricing. It is a Blaupunkt
Melbourne. It has no CD player instead it takes a SD card so you can
have skip free MP3 music no matter how rough the road/trail is. Normal
price is $149 but today and tomorrow they are selling if for $79 and
throwing in a free Ipod interface cable. In addition they have 2Gb SD
cards on sale for $10.

#13 Re: Jeep Cherokee XJ Suspension and Lift Discussion » question regarding front end » 06-13-2011 23:18:17

I haven't run open in years but I don't remember having the noise you
describe. When I get popping and banging noise it is normally something
loose or worn out.

Do you have adjustable control arms? If so check that the jam nuts are

Also check all your control arm bushings.

#14 Re: Jeep Cherokee XJ Mechanical Questions » Cherokee tailgate struts » 02-10-2009 01:05:55

I replaced my struts from Autozone several years ago and they still work OK.  In fact, I believe they have now been in use longer than the originals.

#15 Re: Jeep Cherokee XJ Suspension and Lift Discussion » Gasoline Question » 12-05-2008 13:00:01

No, it is not.  It is all we can get here in CA.  The thing we do notice here though is that our milage drops with the mix.  However, ours is 87 octane.  We drop 2 - 4 miles per gallon with it.  Someone, the growers of corn, have convinced governments that using ethanol in gas is more green.  However it takes oil to make commercial fertilizer to grow the corn and oil to fuel the machinery to grow it, so it takes a lot more oil to make ethanol than what you can get out of it.

#16 Re: Jeep Cherokee XJ Suspension and Lift Discussion » Lifting using blocks » 10-30-2008 15:40:09

i don't see this. the attachment is only in one spot anyway, and the
weight isn't any different.

twisting the spring will make it die faster, even catastrophically.

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