Bought a new Jeep, few problems. Need Help! -
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post #1 of 5 Old 09-26-2011, 11:34 PM Thread Starter
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1995 ZJ 
Join Date: Sep 2011
Location: Regina
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Bought a new Jeep, few problems. Need Help!

So I bought a 1995 Jeep Grand Cherokee Limited with 180,000k. 4.0L 2 days ago for 1000$, and I did a full tune up on it (plugs/wires/cap/rotor/fuel filter/air filter/oil change) and I'm still having a few problems. My oil pressure gauge is all over the place. My temperature gauge is fine, except everytime i hit the gas it drops right down to 0, soon as I let off it goes bback up instantly. My infinity gold CD player in it is a little mixed up, I hit 1 button and sometimes it does the right function, or instead does the function of the button right below it. And also it idles at 500 RPM, but it idles fine when im driving, other than when I'm stopped at lights and stuff it idles rough. Any ideas guys? Sorry for all the questions.

I'm Riley, and I'm new to the forum.


95GrndChrkLmtd is offline  
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post #2 of 5 Old 09-27-2011, 04:06 PM
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1998 ZJ 
Join Date: May 2011
Location: Middle Island
Posts: 801
New sending unit for the gauge, new stereo, temp gauge sounds like an electrical problem someplace maybe just the sensor, the idle is probably a dirty IAC maybe a failing TPS. Wouldnt hurt to replace em both. 180K and 17 years is a long time for anything.
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post #3 of 5 Old 09-27-2011, 04:09 PM
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1998 ZJ 
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I think it's normal for the oil pressure gauge to rise and fall a bit with engine speed especially after start up it will be lower. Mine fluctuates between 35 and 50 or so.
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post #4 of 5 Old 09-27-2011, 04:11 PM
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1998 ZJ 
Join Date: May 2011
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Yes it will fluctuate some but not from 0-30 + lbs. It should never fall to 0 unless you have a problem.
JeepFreak1982 is offline  
post #5 of 5 Old 09-27-2011, 04:51 PM
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1995 ZJ 
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I'd say replace the oil pressure sender, and the temp gauge sender. Since its a 95 the temp gauge sender is located on the *** end of the block, under the wiring from the injectors with about 5mm of space to play with. (You get two senders with the 93-95 zj's, one is in the water outlet tube where the thermostat is, and is for the computer. The other is right in front of the firewall towards the back of the block. Removal is easy if you have a 1/4 ratchet and the right socket break off plastic bit and unscrew the copper plug, but installation is a PITA.)

Normal range for the oil sender I'd say is 40-70 when cold, then 20-45 when warm. It will climb when you hit the gas, and fall when you idle. If its all over the place replacement is a 5 minute procedure, the oil pressure sender costs about 30 from NAPA or 15 bucks from rockauto.

Calm. C.

If a week goes by without needing to replace something, pinch me because I must be dreaming.
TheHalfWit is offline  

infinity gold , oil pressure , rough idle , temperature gauge

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