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Unread 12-28-2012, 10:16 PM   #1
Dustin7837
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2011 JK Wrangler 
 
Join Date: Dec 2012
Location: Boardman, Ohio
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Please help!!!

Ok I have a 99 jeep wrangler 4cylinder sport. First off it cranks REALLY REALLY slow almost not turning over, second this is weird but once I get it started I have to keep gassing it or it will shut off, once I drive it about 100 ft or so it acts perfectly normal. It doesnt matter if I get done driving 200 miles if I shut it off even for a second and try to start it back up im back to square one all over again. I have replaced the battery, starter, fuel pump, checked the connections, checked the alternator I have run out of ideas HELP!!

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Unread 12-28-2012, 11:29 PM   #2
ratfink41
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Might be the throttle body, that's what I'd do next
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Unread 12-29-2012, 09:03 AM   #3
leftlanetruckin
XJ on 37's
 
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1998 XJ Cherokee 
 
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Location: missouri via blackpool,lancs.
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Throttle body would have absolutely nothing to do with very slow cranking, so skip that IMHO.
Sounds like a voltage/ground problem to me.
Before starting it, check the battery voltage.
While starting it, have someone check the voltage at the starter motor.
If the voltage is all good, get the starter motor checked.
Another quick test to see whether low voltage is causing issues, before starting it, hook up another rig to it and use jumper cables as well as your own battery. See how it cranks and runs doing that.
On some rigs, when voltage is low, the engine ecm relearns everything when first started with low voltage. Thus the rough running issues. This coupled with a lethargic starter motor leads me to believe there are still indeed voltage issues. Also go over all ground connections and check for voltage loss there too.
Hell, our 98 XJ does it when it sits so long the battery goes dead, then we have to jump it from the charger/starter pack to get it going. Got to keep the gas pedal down a bit or it would die. After a minute or two, it's perfectly normal again.

Martin
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1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/f12/swap-offically-underway-324622/

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Unread 12-29-2012, 11:20 PM   #4
97flexy
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1997 TJ Wrangler 
 
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slow cranking could be a loose engine ground or maybe a few loose grounds. as for running bad, is your check engine lite on? if so might be one or both of your o2 sensors.
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Unread 12-30-2012, 06:17 AM   #5
Dustin7837
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No check engine light or any other error lights, I checked all grounds (that I know of)
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Unread 12-30-2012, 07:08 AM   #6
leftlanetruckin
XJ on 37's
 
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1998 XJ Cherokee 
 
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Location: missouri via blackpool,lancs.
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So, did you check voltages then or not?
No point talking about anything else until we KNOW that voltages are good etc.
Need to check them and let us know the results.
Martin
__________________
1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622

Years to gain the hands on experience, and offer it freely.
Minutes to gain the knowledge from the internet, and quote it just as freely.
Choose wisely!
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Unread 12-30-2012, 08:37 AM   #7
Dustin7837
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yes checked volts and they are all good
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Unread 01-02-2013, 08:32 AM   #8
Dustin7837
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Location: Boardman, Ohio
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Looks like it was my fuel regulator works great now
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