Question about 1997 Jeep Cherokee Country
I went to get my oil change and found my jeep to have very little oil pressure afterwards. My jeep was given an oil flush and I found my car stalling after 2 miles of driving. I was thinking to change my oil pump. It sounds as though I have a knock in engine as well. I have 210 k miles and have had a knock for about 40 k. Any ideas on what caused it to stall after oil change?
Knock for 40K Miles?
Suggest its time to replace the motor.
I would not have flushed the oil with that many miles; but you might have them change the oil and filter with a heavy weight oil if you had 5-30 try 20-30, if you had 10-30 try 20-50.
Stall after the oil change can be a co-incidence but check something was not knocked loose.
Posted on Mar 31, 2014
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Posted on Jan 02, 2017
SOURCE: Oil pressure gauge
Low oil pressure is generally caused by internal engine bearing wear, not a "bad" oil pump... Pumps become "bad" when debris from a failed component gets into it, causing damage. (exception being pressure regulator spring/plunger assembly becoming clogged with gunk in engines that do not get proper maintenance; likely not your case)
Were there any tapping noises coming from engine when pressure was low? If not, The most common problem is the pressure sending unit, sending bad info to the warning light. If passage going to it or internal passage is gunked up, this problem usually disappears when oil is changed. sometimes the sender just goes bad, in which case, change it.
To get a proper diagnosis on your problem, have someone put a mechanical oil pressure gauge on it. This will read the actual oil pressure and will tell you a lot about the condition of your engine!
I have never seen a valve job that corrected any oil pressure problem. I mistrust anyone who would even think that!!!
Mlinimum low pressure at idle is 15 psi Max is about 60psi running (higher can explode an oil filter) A reading of 15psi indicates the beginning of a problem. although considered "safe" it is not good.
Posted on Jan 03, 2009
Check the alternator and see what charging voltage is... anything over 14.3 volts running should be suspect. If voltage is too high, it is possible that the computer is shutting down the engine to protect itself. I don't see any connection between the fuel tank problem though, unless while doing pump, someone accidentally grounded a hot lead and didn't think any damage had been done. This makes some sense, because the battery alone will lonly put out from 12-13volts, which go lower without alternator, till it reaches a point where voltage is insufficient to operate the ignition system. This is a "shot in the dark" and will likely lower my "rating" but I don't care about that... Try checking this... at least it points you in some direction rather than flailing around!!!
Posted on Jan 13, 2009
SOURCE: car stalls
Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Posted on Jan 14, 2009
Well I had the same problem and wow was I surprised man. I have a code machine that plugs into my car and tells me what wrong with it then I fix it. It read that I had a misfire #1 so that means my spark plug is dirty or something like that. When I took off the spark plug it was smashed in that was a good sign.. I called a mechanic friend of mine and he said that my head and piston were damaged but would not really know unless he took it apart. What he said was true and cost me a great deal of money..!!!! Now searching the web I have found that there many jeep liberty with the same problem just different spark plug locations so I wonder if Jeep knows of this issue but will not acknowledge it.. If you need more information please email me at email@example.com
Check out this link regarding your issue..!!
Posted on Jan 26, 2009
The test is to connect an external gauge to the oiling system and get a reading there. if normal pressure, the sender (transducer) would be suspect, if pressure is too high, further surgery is required, typically a pressure relief valve got jambed. Jambed is very rare, and I would want to know why...
The transducer, which changes the pressure into a voltage value, does fail eventually, and typically is inexpensive to replace.
The oil that you use should be exactly what is specified on oil cap or manual, and no higher or lower weight.
Posted on Sep 14, 2009
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