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Unread 05-11-2008, 12:44 AM   #1
Guumba
Registered User
1998 ZJ 
 
Join Date: Jan 2004
Location: Evergreen, Colorado
Posts: 291
So I did it again....

So after a long absence, the MJ has finally landed itself in my driveway. Picked up a 1988 MJ "SporTruck". Only $800, not too bad of shape. Worst is the paint fade hah. However, right off the bat I am having a minor, what seems like, fuel issue. The thing is, if I turn the key to ON, the fuel pump hums like normal, crank it, fires up only if I give it a bit of gas. Now, okay not a big deal right? If I don't get it started on that "first crank" so to speak, the truck will NOT start. I sit there with the starter going, crank after crank, no go. I take off the air box hose, put a screw driver in the throttle body butterfly valve, and it starts fairly quick. I replaced the fuel filter thinking that might be clogged, no such luck. The little guy also stalled out on me twice, once sitting at a stop light, and one time I killed it with the clutch accidentally, and boy did it take some serious cranking to get it started again. Could something be wrong with my fuel pump? Any ideas to start me off with?

Thanks guys!
Chris Threlkeld

__________________
1998 Jeep Grand Cherokee Limited
AKA "The Black Stallion"
120k on the clock.
Black inside and out.
5.2 Litres of gas guzzling power.
** TOTALED! UGH! **
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Unread 05-11-2008, 01:13 AM   #2
cheepjeep96
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1990 XJ Cherokee 
 
Join Date: Jan 2007
Location: Columbus, Montana, Montana
Posts: 355
Sounds like the Idle air control, or whatever it is. I had a 96 XJ that would run, give it gas it would die, or it wouldn't start unless the pedal was to the floor, and also it wouldn't idle.
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Quote:
Originally Posted by chance_p
i have come to the conclusion that snow kills braincells
Quote:
Originally Posted by Indy
If you only have the 1 clutch however, I'd suggest keeping it if you expect to move by anything other than 1. gravity or 2. transcontinental drift. Both are time tested to work, but you might not get exactly where you want to go.
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Originally Posted by cheapfix View Post
Scanner? You don't even have doors... :p
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Unread 05-11-2008, 05:18 PM   #3
rworks
Registered User
 
Join Date: May 2007
Location: Kathleen, GA
Posts: 90
2nd the idle air controller. Little doohickey on the throttle body next to the tps. Do a quick search on the forum for "idle air controller" and "throttle position sensor" and you'll find lots of info to help you out.
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Unread 05-11-2008, 06:26 PM   #4
Guumba
Registered User
1998 ZJ 
 
Join Date: Jan 2004
Location: Evergreen, Colorado
Posts: 291
Well I have been poking around on the car today and it turned out the EGR valve (I think that's what it was) was bad. The valve on the intake manifold. The guy bought 2 of them and didnt know why and it was a problem. So I took it off put a new one in and it started real quick. Hasnt stalled yet either.

Another problem has arose today. The vacuum disconnect on the front axle is disconnected and I don't have
a diagram for the vacuum system anymore. Anyone have a quick link to a vacuum diagram?

Thanks a lot!
Chris Threlkeld
__________________
1998 Jeep Grand Cherokee Limited
AKA "The Black Stallion"
120k on the clock.
Black inside and out.
5.2 Litres of gas guzzling power.
** TOTALED! UGH! **
Guumba is offline   Reply With Quote Quick reply to this message
Unread 05-11-2008, 10:44 PM   #5
maddzz
Registered User
1989 MJ Comanche 
 
Join Date: Nov 2007
Location: Rhode Island
Posts: 277
Go over to comancheclub.com and search for the vacuum diagram
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