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#1
10-19-2003, 10:05 PM
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1991 cherokee sport
I have a 1991 cherokee sport with the 4.0 just wont run right skips wont rev up just like it has a rev limiter on it . it has had a new computer . also crank sencer. new plugs new fuel filter & air ..could some one tell me what ails it ! thanks ..jeff
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#2
10-19-2003, 11:34 PM
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I had very simular symptoms on my 89 last week. it turned out just to be a vacuum hose (it went to the manifold pressure sensor) that my son accidentaly removed while changing the sensor for the temp guage. plugged it back in and the jeep ran fine.
if you have a 'schucks' auto parts near you they will loan you a scanner. I'd get one, plug it in, and make sure all of your sensors are sending out reasonable readings. it can save you some searching. I had a scanner here and it showed a bad reading on the manifold pressure, I checked the sensor and found the disconected hose. you couldn't see it without really looking for it and I'd have searched for hours without the scanner to guide me.
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#3
11-17-2003, 10:32 AM
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Re: 1991 cherokee sport
I am having a similiar problem. Where do I look for the hose you are talking about? I have a 94 Sport. It will start and stop after driving for a little while. Not long at all. sometimes will start back and sometimes only in nuetral. Help! One Leg and walking!!!
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#4
11-17-2003, 03:15 PM
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the hose that I had fall off was on the manifold presssure sensor. the sensor is on the firewall above and to the drivers-side of the engine. the hose comes in from the bottom.
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