Bought Grand Cherokee. Have a few problems. - JeepForum.com

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post #1 of 16 Old 12-25-2003, 07:46 PM Thread Starter
rollerbones
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Bought Grand Cherokee. Have a few problems.

I just got my 1997 Jeep Grand Cherokee TSI. I have a few problems I need help with. One is the drives heater for the seat dont work...Is there a way to replace? Also the drives door bottom Hinge pin seems bad. I open the door and it drops. Can I replace the pin easy or is there a place that sells the whole hinge?

Thanks for the help
Tom

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post #2 of 16 Old 12-25-2003, 08:18 PM
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Welcome to the board & congrats on your new Jeep! Can't help with the seats, but I have replaced my lower hinge pin (actually it's the bushings that are worn; you'll need two bushings and a new pin). Anyhoo, best if I refer you to this JU thread:
http://www.jeepsunlimited.com/forums...ght=hinge+pins

Good luck!

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post #3 of 16 Old 12-25-2003, 08:30 PM Thread Starter
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Thanks. I will check it out.

Also one more thing. I notice my idle is around 450rpm seems kind of low but is running fine. Normal? and My Volt meter does not show a chage higher then 14volts Normal also?

Thanks for the help again.

Tom
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post #4 of 16 Old 12-25-2003, 08:40 PM
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450 is too low (if your tach is accurate); not sure what it sould be but I think around 700. Probably ought to be charging at about 14 1/2 volts, but is likely OK - I wouldn't trust the oem gauges to be terribly accurate!

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post #5 of 16 Old 12-26-2003, 04:06 PM
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There is an Idle screw on the passenger side of your throttle body..
IT may be under a small cap.. Its a torq driver screw.
Here is a pic of how it loooks..


Hope that helps..

Carl

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post #6 of 16 Old 12-26-2003, 09:47 PM Thread Starter
rollerbones
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Quote:
Originally Posted by Swamp Boy
There is an Idle screw on the passenger side of your throttle body..
IT may be under a small cap.. Its a torq driver screw.
Here is a pic of how it loooks..


Hope that helps..

Carl
You think if I just turn that out a bit it would fix the low idle? Or is there some type of sensor that would need chaged also?

Thanks for the help
Tom
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post #7 of 16 Old 12-27-2003, 05:48 AM
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YOu could check your TPS.(drivers side of carb) There are writeups on how to check it..
But just turning the screw might do what you need..
It worked for me...

Just another soccer moms Grocery getter....
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post #8 of 16 Old 12-27-2003, 08:42 PM Thread Starter
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Quote:
Originally Posted by Swamp Boy
YOu could check your TPS.(drivers side of carb) There are writeups on how to check it..
But just turning the screw might do what you need..
It worked for me...

I see the area where the screw should be. there is a silver looking solid piece in there. Does that pop out to show the screw?

Thanks
Tom.
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post #9 of 16 Old 12-28-2003, 06:21 PM
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heated seat problem

This doesn't concern the idle but i think i can help u with ur heated seats. My Zj limited also has that problem and its because the wires in the seats that heat up tend to break in time, a little defect thats common on the heated seats. So Jeep offers a repair kit that i think is like $15? Anyways, the kit contains wires that have to be installed into the seats by taking apart the seat upholstery. Now, unless ur a professional seat upholster, i recommend u take ur jeep to someone that can install the wires for u and patch ur seat back up. I haven't done it yet to my jeep, but by what i have heard and read on this forum, thats what u gotta do to fix that problem. Hope that I helped. Good Luck

1998 Platinum ZJ 5.9 Limited
K&N FIPK / MOPAR ECU / Bilstein Shocks / H&R springs / Addco sway bars
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post #10 of 16 Old 12-29-2003, 12:58 AM
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If your idle is actually low or maybe your tach reads low. These can be a problem with either the idle air (sensor) motor or the throttle position sensor. You may be able to clean the idle air sensor with fuel injection cleaner spray. Personally I would not try and adjust the idle screw. Idle is controled by the idle air sensor, thru the PCM.

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Last edited by RockPaws; 12-30-2003 at 01:43 AM.
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post #11 of 16 Old 12-29-2003, 05:05 AM Thread Starter
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Quote:
Originally Posted by RockPaws
If your idle is actually low or maybe your tach reads low. These can be a problem with either the idle air (sensor) motor or the throttle position sensor. You may be able to clean the idle air sensor with fuel injection cleaner spray. Personally I would not try and adjust the idle screw. Idle is controled by the idle air sensor.
I have replaced the IAS and today I mite try replacing the TPS. They ar eonly $32 each. Could not hurt I guess.

Thanks
Tom
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post #12 of 16 Old 12-29-2003, 09:09 AM
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Roller bones.. If need be.. THe silver cap does come off..
Just pop it out of there..

I changed my IAS and TPS to no avail. Popped out the cap and idled her up a bit.. Im all set..

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post #13 of 16 Old 12-30-2003, 01:40 AM
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Have you checked for any error codes?

The idle screw that people are refering to is actually a set screw used to mechanically limit the position of the throttle body plate. This is factory setting. All idle speed functions are controlled by the PCM. By changing or adjusting this screw, you are also changing the output voltage of the TPS at idle. Thus increasing idle speed of the engine, and possibly creating a lean condition.

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post #14 of 16 Old 12-30-2003, 05:18 AM Thread Starter
rollerbones
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Quote:
Originally Posted by RockPaws
Have you checked for any error codes?

The idle screw that people are refering to is actually a set screw used to mechanically limit the position of the throttle body plate. This is factory setting. All idle speed functions are controlled by the PCM. By changing or adjusting this screw, you are also changing the output voltage of the TPS at idle. Thus increasing idle speed of the engine, and possibly creating a lean condition.
I am going to change the TPS sensore this week , if that does not do it what else can I try besides adjusting? What else mite cause the low idle? It is not throwing a CEL but does it always if a sensore is bad?
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post #15 of 16 Old 12-30-2003, 08:12 PM
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If its neither the IAC or TPS, I would take it some where and have the computer checked. I do not like throwing parts at a problem to see what fixes it. (we call it "Shotgun Maintenance").


Here is what the PCM looks at idle mode, at operating temp (closed loop). Inputs to the PCM:
1) A/C select signal
2) A/C request signal
3) Battery voltage
4) Crankshaft position sensor
5) Eng coolant temp sensor
6) Intake manifold air temp sensor
7) Manifold absolute pressure (MAP) sensor
8) TPS - throttle pos sensor
9) Camshaft position sensor (is distributor)
10) Park/neutral switch
11) O2 sensors
Based on these inputs - voltage is applied to the fuel injectors with the ASD relay via the PCM. The PCM wil them control injection sequence and injector pulse width by turning on and off voltage to each injector, thru its ground circuit.

The PCM monitors the O2 sensorsinput and adjusts air fuel ratio by injector pulse width. It also adjs eng idle speed thru the idle air control (IAC motor).
The PCM also adjs ignition timing by inc or dec spark advance.

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