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Unread 12-09-2008, 08:36 PM   #1
bringbackphish
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1990 YJ Wrangler 
 
Join Date: Dec 2008
Location: amityville, ny
Posts: 74
Restart Idle High and High Oil Pressure

Hey im new here and have a couple of problems, Just picked up my Yj a couple weeks ago its also my first stick shift. When I stall occasionally and restart, the idle is way too high around 2200 rpm and stays there for about 20 seconds. Also my oil pressure gauge is reading off the meter but it does go down when the engine is off. Any ideas. Thanks,
Rob

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Unread 12-09-2008, 09:11 PM   #2
bigredcherokee
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1992 YJ Wrangler 
 
Join Date: Dec 2005
Location: Shreveport, LA
Posts: 574
Rob you could have a bad sending unit or gauge. Do a search on the forum and it will bring up a tone of info. As for you idle I beilieve your carbarated and could have a sticking coke or vacume leak not sure. One delt with a carb on my 90 long time ago and I pulled it off and went MPI.
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Unread 12-09-2008, 09:46 PM   #3
Mean Max
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1991 YJ Wrangler 
 
Join Date: Jul 2007
Location: Stuart, Florida
Posts: 13,682
Umm, he has TBI, it's a 4-banger.

2.5L I4 TBI (fuel injected) - 121 hp @ 5000 rpm, 135 ftlb @ 3500 rpm - used in '87-'90

It's not uncommon to see the oil pressure rise (my 4.0L pegs the gauge at idle when cold) at a really high idle, although I doubt the accuracy of the gauge due to the afore-mentioned sender unit's reputation. Replace it if you feel the need to, FWIW I haven't replaced mine yet...

As for the high idle on start up, start with checking for the vacuum leaks that bigredcherokee mentioned, and then thoroughly clean your throttle housing & idle control motor.


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Originally Posted by bigredcherokee View Post
Rob you could have a bad sending unit or gauge. Do a search on the forum and it will bring up a tone of info. As for you idle I beilieve your carbarated and could have a sticking coke or vacume leak not sure. One delt with a carb on my 90 long time ago and I pulled it off and went MPI.
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