Last post on Oct 29, 2013 at 2:17 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
What is this discussion about?
Jeep Cherokee, Transmission, SUV
#39 of 276 Re: 1990 Jeep Cherokee Limited - Problem [rachel6]
Oct 21, 2007 (9:21 am)
Erratic shifting in my 1990 Laredo was the EGR valve: more specifically, the EGR back-pressure transducer, which I think is only used in 89-90. It's attached to the EGR valve when you buy one, and it won't let a vacuum to the EGR valve unless there is sufficient exhaust back-pressure. The diaphragm in mine was worn out, but not completely shot, causing the EGR valve to flutter rapidly, and somehow causing erratic shifting between 2-3 and 3-4, especially under load. Try disconnecting the little, short, 90 deg tube beneath the EGR transducer, where exhaust backpressure comes from, then drive and see if one or more of your problems gets better.
#40 of 276 Re: 1990 Jeep Cherokee Won't Start No Spark [dkwalters128]
Oct 26, 2007 (4:40 pm)
I have a 93 cherokee it only starts if I leave the key on for a few minutes, something clicks then I turn key all the way it starts most of the time . I hav'nt found the problem yet though.
#41 of 276 1993 Cherokee wont start
Oct 26, 2007 (4:49 pm)
I have a 1993 grand cherokee.I get no power to the coil or fuel pump.If I leave the key in the on position for a few minutes something clicks, then I turn the key all the way, it starts. can anyone help? ,please!
Oct 27, 2007 (3:18 pm)
Easy & free thing to check: Swap your relay under the hood - there are a couple of them that are identical & can be swapped as a quick 'check' for a bad relay. If that "fixes" it... then it's off to the parts store for a replacement of the bad one.
#43 of 276 Re: asdf [lunghd]
Nov 04, 2007 (8:24 am)
1996 Jeep Cherokee 2WD- the car sometimes doesn't want to start (engine won't even turn). Sometimes you have to take the car out of gear and put back into park to get it to start. We've replaced the starter, but this appears not to be the problem. It is a hit and miss when this occurs, no common items to tie to a specific cause.
#44 of 276 kempertrax
Nov 04, 2007 (2:54 pm)
Here's the top three suspects for ya:
Neutral safety switch - moving gear selector is a clue for this one. Intermittent reverse light function is another possible (& rather typical) symptom. Switch can be removed and cleaned rather than replaced. Crown Automotive (online jeep parts seller) has them for about $110... which is about 1/2 stealership cost.) You can google for a 'how to' rebuild article or hit my website http://www.lunghd.com/ & look in the On Site or Off Site Tech indexes. Also a zip file download on my downloads page.
Brake safety interlock - press brake pedal to allow engine to start. This one should have come standard on your XJ but was installed as a recall item on my older XJ. If switch goes bad - may not allow engine to start when brake pedal is depressed.
Column ignition switch (not the key switch... but the electrical switch located on lower half, upper side of steering column.) Another "how to" download on my site. Switch is about $20 at NAPA auto parts.
#45 of 276 99 Jeep Cherokee Stalls while driving now won't start
Nov 04, 2007 (5:45 pm)
It looks like a lot of problems are similar to mine, but thought i would throw mine out there too.
My 99 Cherokee has been off and on. It will usually start on the first try, but when I get on the road it will die on me while I am driving. Most of the time I can put it in neutral and start it back up again while driving. Recently it has not been starting up as easily and I have to pull off to the side of the road for a while. when it starts, it starts like nothing is wrong. I took it to the shop and they couldn't find anything wrong.
Today, it didn't start back up and I had to have it towed. It sounds like from what i have read is that this could be the computer problem.
I don't know much about cars, but is this something that can be fixed easily myself. If not what kind of shop do you take it to for this kind of work?
#46 of 276 giwally
Nov 05, 2007 (4:29 am)
Standard Cherokee (XJ)?
What size engine?
Assuming a 4.0L inline six cylinder in an XJ:
Suspect #1: Check your engine ground strap at rear of head. It is a braided metal strap that runs from the motor to a ground point on the upper driver side engine firewall. If it's frayed / broken it can cause all kinds of intermittant wierdness (stalling/stumbling/electrical issues). You can replace those with a generic battery cable from your local auto parts store.
Suspect #2: Try checking the Crankshaft Position Sensor output with a digital volt meter. Crankshaft position sensor is located on bellhousing, just behind head, to driver side and is easily disconnected for testing with the small connector going to it. Removal and replacement is a royal pain in the butt but if you have a good set of tools can readily be done at home.
Procedure is the same for all year 4.0L engines and can be found on my website's "RENIX Sensor's Diagnostics Page". ( http://www.lunghd.com - look in engine category of "On Site Tech") MOST other tests there will not apply to your HO engine as they have different sensors than the older RENIX engines.
If discussing this with a mechanic, be aware that the ChryCo service procedures refer to this as a CKS (CRANK-shaft Position Sensor). It is also commonly referred to as a CPS but the CPS is actuallythe CAM-shaft Position Sensor which is located inside the "distributor" housing of 'most' 4.0L engines.
There are other things that can cause similar issues... these are just the top two that come to mind. HTH
#48 of 276 bit of minor trouble...1990 cherokee...
Nov 11, 2007 (11:40 pm)
hello all...i own a 1990 4.0 cherokee bought from original owners...with all the repair paper work...im having some issues and was hoping the pros could help me out...so here goes...
1.ruff start...takes about 3-5 seconds...cold or hot...
2.occationally after start it will rev at 2000rpms...sometimes it will last a second or two and drop to the norm...but sometimes it stays at 2000...if i hit the gas it will creep to 2500 and stay...so i turn off then restart...no problems...
3.occationally when i come to a stop there seems to be a knock or slight jerk...when it does not occur when i go to accelerate same little knock/jerk...
im thinking...fuel pump, air/vacum, old hoses...
other than that i am very happy...would like to know if the problems may be related or if someone may know what the cause is...
any insite would be a life saver...truthfully...