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Idle adjustment on 2001 xj cherokee

Idle speed is too slow how do i increase it

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

ZJLimited
  • 17970 Answers

SOURCE: Someone took a baseball bat to the drivers side

I suggest check the Jeep-XJ-2000-08t-Power-Mirror-System

Good luck.

Posted on Mar 15, 2010

  • 6982 Answers

SOURCE: My 1995 Jeep Grand Cherokee idles perfect on

Your idle speed is controlled by the computer which reacts to signals from the engine sensors . You need to test the sensors with a digital multi-meter to determine which one is not giving proper readings.
both haynes and chilton manuals have good test procedures but I prefer chilton for better wiring diagrams.
Aside from sensors, I would clean the throttle body using carb cleaner inside, around the throttle plate to make sure it is sealing properly when closed. The device next to the tps should be your idle control solenoid. that too needs cleaning. If you remove it, don't turn the plunger on the end and do not loose the o ring. Good testing is necessary to determine what is wrong. get the manual and do it. No good shop could possibly tell you what's wrong without doing the exact same thing. If you have any stored fault codes, have any of the larger parts stores check them for you. Most do this free and it can be helpful to give you a starting point for tests.
Not necessary to rate this answer because aside from advice, I can't tell you exactly what is wrong.

Posted on May 13, 2010

witmoz
  • 389 Answers

SOURCE: how do I adjust idle

the base/curb idle is not adjustable because of the renix system it uses,but if its idleing to low or high i would check the tps (throttle position sensor)located on the right front on the throttle body.if you have an ohms meter you can check it to make sure it is getting voltage with the key on.

Posted on Oct 08, 2010

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2 Answers

How do you adjust idle speed 1991 johnson 100 hp


not important, what's important is that they are absolutely clean, including the four brass high speed jets located in the bottom center portion of the carburetor.

That model engine's carburetors has fixed jets, BUT if the slow speed jets are adjustable, earlier model carburetors have been installed. If so...................

The four adjustable needle valves control the flow of fuel in relation to the set air flow, adjusted as follows (if needed).

(Dual Carb V/4 With 4 (2 each carb) Slow Speed Adjustable N/Valves)
(J. Reeves)

The adjustment procedure of the carburetor slow speed needle valves follows. NOTE... if the needle valves turn too freely, replace the nylon bearing retainer (the nylon item at the front of the carb that the needle valve goes through first) with the newer type RED retainer #315232. If your engine has that weird linkage that connects all four of those needle valves, the newer RED retainers will enable you to discard that linkage. The RED retainers make it impossible for the needle valves to vibrate out of adjustment.

(Carburetor Adjustment - 2 Slow Speed Adjustable Needle Valves, each carburetor)

Initial setting is: All (4) Slow speed valves = seat gently, then open 1-1/2 turns.

Facing the carburetors, start with the top left needle valve, then the top right valve, then the bottom let valve, then the bottom right valve. It may be necessary to redo these steps to get the adjustments ideally set

Start engine and set the rpms to where it just stays running. In segments of 1/8 turns, start to turn the S/S needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running.

Eventually you'll hit the point where the engine wants to die out or it will spit back (sounds like a mild backfire). At that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

Do not attempt to gradually adjust all four of the valves at the same time. Do one at a time until you hit the above response (die out or spit back), then go on to the next valve.

When you have finished the above adjustment, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway.

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1 Answer

How to increase idle speed on 97 mercury grand marquis, idles to slow,then stops running.


Idle speed is controlled by the computer. If it is idling slow then there is a different issue. A malfunctioning sensor is the most likely culprit.

Oct 16, 2016 | Mercury Grand Marquis Cars & Trucks

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Idle adjustment on 96 jeep 4.0


There is no idle speed adjustment. Do you have any fault codes in the PCM memory? Does the engine have any vacuum leaks, that will cause a high idle, use a can of carburetor spray and spray around the intake manifold, if the engine idle speed changes you have a leak and have found the problem. You could also have a sticking automatic idle speed control valve in the throttle body.

Feb 07, 2012 | Cars & Trucks

1 Answer

The vehicle engine is shut off immediately when you release the acceration pedal


PROMLEM MAY BE BECAUSE LOW IDLE SPEED ADJUSTMENT. INCREASE THE LOW SPEED/ IDLE SPEED BY INCREASING THE FUEL INTAKE . IN CARBURATOR VEH. ADJUST THE IDLE SCREW CLOCKWISE. IF IT IS FUEL INJECTOR INCREASE THE FUEL AT PUMP ITSELF.

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The engine in my 1994 jeep grand cherokee 4.0 idles very low (below 400 r.p.m's) when it sits still, Can I idle it up....how??


The idle speed adjustment on most fuel injected vehicles is located in a recessed hole near the throttle butterfly on the intake manifold(sometimes with a plug in it). Screwing out the adjusting screw should increase idle speed.

Aug 18, 2010 | 1994 Jeep Grand Cherokee

1 Answer

My oil pressure is dropping and at the same time my car is idleing to where it seems like my fuel pump is dying. Are the 2 related. If I step on the gas the oil pressure picks up and the my car gets gas...


Your oil pressure will increase and decrease with the speed of the engine. As long as your oil pressure increases, that's ok. The idle problem could be caused by a dirty fuel or air filter. I would start with replacing the fuel filter and check the condition of the air filter.

May 14, 2010 | 2001 Jeep Grand Cherokee

2 Answers

How do I set the idel on a 2001 Jeep Cherokee?


the idle is controlled by the computer. you have to have the ecm reflashe dby a professional

Nov 22, 2009 | 2001 Jeep Cherokee

1 Answer

Death wobble 93 jeep grand cherokee


thiers many of things that can cause that, first off with your kit i didnt see lower adjustible
arms so with that much lift your diff angle could be off. needs to be 7deg. also if your sure the ball joints are perfect and its alined right them look at the stearing box for play in the arm . it can be adjusted with the set screw. jeep-xj.com hope that helps....

Jun 19, 2009 | 1993 Jeep Grand Cherokee

2 Answers

Base idle speed adjustment....1KZ-TE 3.0 litre turbo.


Hi djay,
the idle speed control can be adjusted on the pump by turning the adjusting screw that stops the accelerator lever.
Cheers

Aug 19, 2008 | 1996 Toyota Land Cruiser

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