Question about 1989 Jeep Cherokee

1 Answer

We have a 1989 jeep cherokee larado, 4.0 liter motor auto trans. that idles to fast. Idles at 1600 rpms in gear and 2000 rpms in park and idle. Have tried the idle stop and the throttle position sensor. What else can we try?

Posted by on

  • Christy Shelton Jul 08, 2012

    We have tried the bypass screw adjustment and the throttle position sensor neither helped. any other suggestions to try?

  • Christy Shelton Jul 08, 2012

    could it be a vaccuum problem?

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 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.

  • Master
  • 493 Answers

Idle bypass screw adjustment or idle steper motor.

Posted on Jul 05, 2012

  • Grant Shaw
    Grant Shaw Jul 08, 2012

    Check Idle steper motor located on throttle body, remove the idle motor & clean with throttle body cleaner & put back in.

×

Ad

6 Suggested Answers

Anonymous

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Richard Scordino

  • 6982 Answers

SOURCE: 97 Jeep grand cherokee 6 cyl. idles down to 0 and dies.

any leaks in intake or exhaust upstream of the sensors, sparkplug condition and engine controls/sensors for out of range operation (including fuel pressure and condition of regulator)
IAC should be cleaned and checked as this can cause poor idle and shut down. I'm not saying not to change O2 sensors, but unless everything else if OK, it probably won't help.

Posted on May 29, 2009

justuscc

Jimmy

  • 360 Answers

SOURCE: 1989 Jeep Idle Races at startup

yes its the iac "idle air control" they go bad also loose batt conections cause this problem good luck

Posted on Sep 20, 2008

Anonymous

  • 23 Answers

SOURCE: jeep idles around 500 rpms

check throttle position sensor

Posted on Oct 03, 2008

Anonymous

  • 1 Answer

SOURCE: 2004 jeep grand cherokee idling problem. Revs motor 200 to 500 rpms higher while driving.

I had the exact same problem on my 04 GC. I put some Techron Concentrate Plus Fuel System Cleaner in from Wal-Mart and it seemed to fix the problems right away. Let me know.

Posted on Jun 01, 2009

Anonymous

  • 40 Answers

SOURCE: i have a 95 jeep grand cherokee that will

check the fuel pressure on the fuel pump

Posted on Jul 31, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Engine idles at 1000 RPMs.At 60 MPH 2000 RPM's.Is this normal?


the 4.0L engine?
is this engine cold or hot.
why is 2000 rpm wrong for 60mph., (depends on engine and axle size and what gear you were in , then)

the idle speed for hot is too high
did you scan the PCM yet?
if hot , idle is high, is the thermostat holding water temp 180f or above. ? if not that is the problem.

Aug 23, 2016 | 1996 Jeep Grand Cherokee

1 Answer

2000 v 8 What would cause the rpms to flutuate while driving and be high when in park?


My Jeep Grand Cheroke Limited 2000 did the same thing and the dealer replaced the O2 sensor and problem was solved. It about drove me crazy until it was figured out.

Jul 03, 2014 | 2000 Jeep Grand Cherokee

1 Answer

Idle problems


Replace that sensor

Nov 12, 2012 | 1996 Jeep Grand Cherokee

1 Answer

Idles fine wont stay running, surges


Get the fuel mapping sensor looked at. what type of car is it?

Sep 03, 2012 | 2000 Jeep Cherokee

1 Answer

Misfire, idles high


I would start with ect. That is the engine coolant temperature (sensor). That sensor monitors the coolant temp and tells the computer to increase engine RPM so the engine warms up faster. In the mornings when you first start your car and it idols high, that sensor is sending that information. If you have a code for this sensor start there.

Dec 10, 2017 | 1997 Chevrolet Cavalier

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

04 jeep cherokee larado idles too slow or fast then engine light comes on


Ask for a free scan of your computer at any chain auto parts store; there is probably an error code stored that may tell you the source of the problem. It takes only a few minutes and will yield a 4-digit code pointing toward the problem.
I suspect the idle air control is faulty or you have a broken vacuum line or leak.

Sep 16, 2010 | 2004 Jeep Grand Cherokee

1 Answer

2004 jeep grand cherokee idling problem. Revs motor 200 to 500 rpms higher while driving.


I had the exact same problem on my 04 GC. I put some Techron Concentrate Plus Fuel System Cleaner in from Wal-Mart and it seemed to fix the problems right away. Let me know.

May 31, 2009 | 2004 Jeep Grand Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

298 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

Marvin
Marvin

Level 3 Expert

85223 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

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

Answer questions

Manuals & User Guides

Loading...