Question about 1991 Jeep Wrangler

1 Answer

1991 Wrangler 2.5 L idle problem. In N, vehicle

1991 Wrangler 2.5 L idle problem. In N, vehicle idles at about 3K RPM, can't seem to find the solution. any idea of what this problem could be? Started when starter and water pump were replaced, the fuel rail was loose, bolted it down and now have this idle problem. Since then, I've replaced Idle Control Valve, but still having the problem.

Posted by jay7412 on

Ad

1 Answer

Anonymous

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 295 Answers

Sounds like you have a major vacuum leak. Plug the throttle body completly with you hand. If the car does not stall out there is you idle problem. Take carb cleaner spray vacuum like throttle body gasket intake gasket etc. Hope this helps please rate me.

Posted on Jul 09, 2009

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Whats oil pressure on 3.1 isuzu


4psi idle (bad) and revving to 3k does what, you didnt say.
what was idle RPM 800 or 400>?
the answer is different by hot and cold oil
and oil type, no type stated (do not say brands) 10w30?
running 0w are you>?
and is as low as 8psi hot. at idle ,that is if idle speed is at spec.
is it?
and 3000 rpm would be like 25psi hot, and more cold.
the max pressure will be the pump regulator value.

here is the sensor spec.

The sensor closes when the oil pressure drops to between 4-7 psi (28-48 kPa).

the oil type and bearings clearances (in total) dictate pressure.

3,1 CPC engine spec is.


24649295-qvvdcm34jvcwbumk4o5kywm4-3-0.jpg

Jun 17, 2014 | 1994 Isuzu Trooper

1 Answer

What should the idle speed be set at on a 1989 jeep wrangler 4.2 liter straight 6 cyl. It has a 2bbl carb. It idles at 1000 rpm right now but seems fast or is that about right?


Most carb. engines should idle between 725 and 750 R.P.M., lower the idle and be sure to check the timing. You should have an emissions label under the hood to explain the idle and timing.

Aug 16, 2011 | 1989 Jeep Wrangler

1 Answer

1990 wrangler with a 4cyl was dying at idle found the vac line to the map sensor had a crack replaced it and reset the computer. Still dies at idle and now cuts out at higher rpm. Have to fan clutch th...


It could be a combination of 2 things. A faulty MAP sensor itself or a bad TPS (throttle position sensor). It's not uncommon for a bad TPS to idle when the motor is cold but once warm, not idle fast enough to keep the vehicle running.

Jul 18, 2011 | 1990 Jeep Wrangler

1 Answer

I have a ticking noise i was told it may be a loose rocker arm or a rod bearing... really hope its a rocker arm. but it get worse when the motor warms up, and only ticks in mid rpms when in high rpm the...


One thing you should get checked is the oil pressure.You could have an oil pump that is going out or getting weak.Also depending on how regular you are with your oil changes it is possible that you could have a sticky lifter.The oil pressure at idle should be 4 psi and 25-80 psi at 3k rpm.If it is less than 4 psi at idle do not do the 3k rpm.This is check with a warm engine.(normal operating temp).Hope this helps.Good luck.

Oct 26, 2010 | 2004 Dodge Neon

1 Answer

I have a 2008 Yamaha vx110 deluxe waverunner that idles high.


I dont know the answer but my vx deluxe is doing the same thing. Not as bad as yours but 4k rpm idle.....ANyone?

Jul 13, 2009 | 1997 Acura CL

1 Answer

Describe your 1997 Jeep Wrangler 1997 jeep wrangler 4 cyl idle fluctuates 900 rpm to 400 rpm after warmup no service engine light but check guages light comes on momentarily when rpm gets low and oil press...


The check gauges light is normal because at 400 rpm it isn't running fast enough to build sufficient oil pressure. I am guessing maybe a vaccum leak???

Jul 10, 2009 | 1997 Jeep Wrangler

2 Answers

Rough idling in an '06 Jeep Rubicon


Try cleaning your throttle body, then disconnect the battery to clear the memory.

Sep 27, 2017 | 2006 Jeep Wrangler

2 Answers

Jeep wrangler stalls out


check maf and tps sensor

Feb 18, 2009 | 1988 Jeep Wrangler

1 Answer

Timing at idle is more than 1000rpm


It appears the car may not be entering tuneup mode. warm up until temp is normal, idle stays below 1000 rpm
2000 rpm for 2 minutes
rev engine 2-3K three times
idle for one minute

turn off
disconnect tps
start
rev 2-3K three times
adjust timing

Oct 02, 2017 | 2004 Nissan Sentra

1 Answer

Engine high rev at stop and slowly goes to idle speed.


I've got Hyundai Lantra 1.6 year 2000. It's take time to start when it's hot. When I start my car it revs at about 2k-3k rpm. It also does it when I come to a stop. When I come to a stop it will stay at a higher rpm than that of idle speed. It drives ok when on freeway but uses more petrol. I have changed the water & petrol pump but no luck

Oct 26, 2008 | 2000 Hyundai Elantra

Not finding what you are looking for?
1991 Jeep Wrangler Logo

Related Topics:

309 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...