Question about 1999 Jeep Grand Cherokee

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Car misses at idle speed

As i was driving my 99 jeep grand cherokee 4.0 on the expressway about to accelerate to change lanes the car would not take off. I would step on the accelerator and it would not go faster. After I slowed down the car was working fine, but it happens on and off.

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Tps sensor tps sensor tps sensor

Posted on Sep 30, 2012

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Has anyone answered you yet on this?

Posted on May 24, 2012

  • Philip Frye Oct 01, 2012

    I fixed it myself. After I pulled the fuel pump out I had found that one of the rubber hoses had somehow come loose from the metal line it should have been clamped too. After pushing the rubber hose back on the line and re-clamping it the vehicle runs great. Always the small simple things!

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Replace fuel pump inside tank

Posted on Mar 10, 2009

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I've got a 1996 jeep grand Cherokee with the 5.2 v8 fuel injected Holley throttle body. My problem is while driving at soft or low acceleration it accelerates fine, but if you hit the throttle hard it


I would check the voltage on the throttle portion sensor with the engine off from idle to wide open throttle.If there are any dead spots, replace the sensor. If the tps checks out, you should check fuel pressure. If you have good fuel pressure, you may want to make sure there isn't a lot of slack in your timing chain. I don't believe you mentioned the mileage of your vehicle. Best of luck.

May 03, 2014 | 1996 Jeep Grand Cherokee

1 Answer

Motor surge at constant driving speed


Acceleration is defined as a change in speed, either a negative acceleration (slowing down) or a positive acceleration (speeding up). If you have constant speed, you are not accelerating.---------------------------------------------------------------------------------------
Multi-Di@g Access

Jan 14, 2013 | 2005 Jeep Grand Cherokee

1 Answer

1999 Jeep Grand Cherokee has poor acceleration


try the throttle position sensor as well, wont run you more than forty bucks give it a shot

Sep 10, 2012 | 1997 Jeep Grand Cherokee

1 Answer

I have a '97 Jeep Grand Cherokee Laredo 4.0 liter that won't idle


Check your throtle postition sensor. It monitors what postion the throtle is at and sends that info to the ecm. It will go bad and cause that problem.

Feb 09, 2010 | 1997 Jeep Grand Cherokee

2 Answers

99 Jeep Grand...Idle up and down and now a check engine light


Sounds like an air leak somewhere after the air filter chamber.With engine idling spray some carb cleaner at different areas along the intake hose and the intake manifold,any place air can get in.If rpms change you have found leak.

Jul 07, 2009 | 1999 Jeep Grand Cherokee

1 Answer

1999 jeep grand cherokee will not shift into over drive.


change the Speed sensor on the transmition.  On my 99 it would not shift out of first gera when my gas light would turn on. Every time it happened untill i filled it up . I changer the speed sensor  and all is fine

Apr 05, 2009 | 1999 Jeep Grand Cherokee

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1999 Jeep Grand Cherokee Problem


Idle prolem could be a dirty throttle body or sticky air idle control motor.
If the Jeep is a 6 cly. the adjustment for the belt is the power steering pump.
If the Jeep is an 8 cyl. the tensioner is on the pass. side of car.

Oct 17, 2008 | 1999 Jeep Grand Cherokee

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