Question about 2009 Jeep Grand Cherokee
When crusining at about 35mph the engine seems to hesitate. It is noticable and if you accelerate it goes away. At first I thouhgt it was bad gas, but have filled the tank a couple times and it continues.
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Posted on Jan 02, 2017
The egr valve is located on the front of the right cylinder head. It has a tube attached to it and going to the intake manifold.It has failed and is why your jeep is running rough and hesitating. Replace it and it will fix your driveabllity issues. Disconnect the battery for 2 min to clear the code.
Posted on Apr 02, 2009
A loose gas cap will sometimes trigger the service light to come on. Since this appears to have happened on multiple occasions I can assume that this is not the problem but may be associated with it. The level of gas in the tank affects the amount of atmospheric pressure in the tank. There are multiple things that could set off the light, one being a loose or defective gas cap, and the other is a fuel vapor return valve. I'm not sure of the exact type of fuel system you have so I cant give a more exact answer. If you wanted to give something a shot before bringing it into the shop, you can simply replace the gas cap first, a very cheap try.
Posted on Dec 12, 2008
A slight hesitation after engine shut off due to engine running rich meaning not meeting golden air:gas ratio of 14.6:1 so fuel residue in chamber continue to burn for the last moment. The same rich fuel problem that was why you had to let gas off during acceleration. Need to Check out the O2 sensor Check out MAP sensor Good luck
Posted on Sep 13, 2009
You should add a rs4 performance chip or the fuel economy chip also made by rs4. there like 70 bucks. If the problem is electrical changing your chip could solve the problem. Even if is doesnt work the chip will make your truck idle more smoothly, have better throttle response, and you will add 3-7 mpg. I bought one for my 1997 jeep grand cherokee straight six, and it felt like i was driving a different truck . It mae that much of a difference...you cant loose!!!Like everyone says , it could be a vac leak or a clogged fuel filter , soetimes bad gas...your problem is a needle in haystack. Try the chip...I hope this helps
Posted on May 24, 2010
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