88 Cherokee will not idle - JeepForum.com

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post #1 of 42 Old 05-13-2013, 07:34 PM Thread Starter
79chiefs
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88 Cherokee will not idle

As the title states, also VERY hard to start, have to pump gas to started and keep running. I cannot hold it, i have to pump it. While it is cold if i let rpms get low sounding it bogs out or if they get high it bogs out. But once warm it will run just not idle with out pumping it.


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post #2 of 42 Old 05-14-2013, 06:07 AM
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What have you done so far?

Are your intake manifold bolts loose or missing?

Hose from throttle body to MAP messed up in any way?

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post #3 of 42 Old 05-14-2013, 07:31 AM Thread Starter
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I have cleaned the throttle body and replaced vacuum lines, i have to go buy more line thought. That line looks good, after i cleaned it with parts cleaner it ran better but had a surging idle. Replacing a few lines fixed that. But it tries to correct idle but does die.

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post #4 of 42 Old 05-14-2013, 07:34 AM Thread Starter
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No bolts are missing but there us a hole above the map sensor line on the intake, it had nothing in it so i plugged it. I think i still have a leak and will keep looking for it, but have traced all lines with a vacuum diagram and not found it. Could i just eliminate that vacuum tree thing and run the lines directly to their connection?

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post #5 of 42 Old 05-14-2013, 02:05 PM
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Quote:
Originally Posted by 79chiefs View Post
No bolts are missing but there us a hole above the map sensor line on the intake, it had nothing in it so i plugged it. I think i still have a leak and will keep looking for it, but have traced all lines with a vacuum diagram and not found it. Could i just eliminate that vacuum tree thing and run the lines directly to their connection?
You mean hole above the vacuum line on the throttle body?

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post #6 of 42 Old 05-14-2013, 02:18 PM Thread Starter
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Yes, it now has all new vacuum lines, it idles lower, but still stalls. It also has surging start up back. And it starts quicker now.

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post #7 of 42 Old 05-14-2013, 02:20 PM Thread Starter
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I am also have constant trouble with the starter clicking, then it will turn, then click click click, and turn. Lately it just clicks and once in a blue moon turn.

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post #8 of 42 Old 05-14-2013, 02:25 PM
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Quote:
Originally Posted by 79chiefs View Post
I am also have constant trouble with the starter clicking, then it will turn, then click click click, and turn. Lately it just clicks and once in a blue moon turn.
Bad battery, bad starter, bad cables, bad connections, bad grounds......

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post #9 of 42 Old 05-14-2013, 02:36 PM Thread Starter
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Starter rebuilt, it works fine i replaced it same, so i got my money back. I did a ground refresh as i read that might help. Battery is new. I cleaned all connections i could find as stated in the ground refresh thread i read. I will be getting new cables as these are 25 years old.

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post #10 of 42 Old 05-14-2013, 03:00 PM
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Good plan.

If you own a Renix Jeep, you'll want to check this out.

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www.cruiser54.com

My Jeep Technical Photos

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post #11 of 42 Old 05-14-2013, 03:08 PM Thread Starter
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Now, about that hole i plugged is it supposed to be plugged? I read a thread on the IAC, pulled it and i could hardly get it out. It was frozen in with carbon build up. But in the diagram that explained how it worked, it showed an air passage, and that hole at the end of it.

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post #12 of 42 Old 05-14-2013, 03:09 PM Thread Starter
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On my throttle body there is two holes not 4, one has the vacuum line for the MAP sensor in it the other i plugged.

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post #13 of 42 Old 05-14-2013, 03:10 PM
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I'm confused. What hole did you plug?
And with what?

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

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post #14 of 42 Old 05-14-2013, 04:18 PM Thread Starter
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Plastic plug from an old refrigeration unit.
It in the pic but without plug.
Replaced battery cables, put two new negatives for extra ground, and still starter clicking. Could it not be getting a charge to turn? As in a relay engaging the solenoid for the gear to move to the flywheel, but not for the motor to turn, if that makes sense.
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post #15 of 42 Old 05-14-2013, 04:21 PM Thread Starter
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http://www.jeepforum.com/forum/f11/8...m-leak-153902/
This tread explained it, i guess there is nothing in that hole.

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