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Unread 08-14-2013, 01:16 PM   #1
xjberto
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Join Date: Feb 2013
Location: Maywood, nj
Posts: 27
lacking power in fourth gear.

Hey guys. So I'm not sure if I was always experiencing this problem or if I'm just noticing it. Basically if I'm driving on the highway and I'm cruising in 4th, if I try to accelerate its very hard to get it moving. I also hear what sounds like a metal clinking sound coming from the engine compartment. I only hear it when the car is under stress or load in 4th gear. Any othergear and I don't hear anything and the car accelerates perfectly fine.
Does this sound like normal jeep behavior or do I have issues?

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Unread 08-14-2013, 05:53 PM   #2
xjdantheman
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1993 XJ Cherokee 
 
Join Date: Mar 2013
Location: overland park, ks
Posts: 210
auto or manual transmission?
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Unread 08-14-2013, 07:23 PM   #3
xjberto
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Join Date: Feb 2013
Location: Maywood, nj
Posts: 27
Auto aw4
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Unread 08-14-2013, 08:03 PM   #4
xjdantheman
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1993 XJ Cherokee 
 
Join Date: Mar 2013
Location: overland park, ks
Posts: 210
sounds like maybe your experiencing pre ignition or pinging. happens when the fuel mixture is ignited before the spark plug can.

a few things can cause this, timing too advanced, carbon build up in the cylinders causing hot spots or increased compression. try adjusting the timing first, then run some fuel system cleaner in there like seafoam or run some water down the intake. i know the latter sounds weird but its on old school trick to clean carbon out much faster then a fuel additive.
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Unread 08-15-2013, 07:22 AM   #5
mollydodger
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1998 FSJ Cherokee 
 
Join Date: Apr 2006
Posts: 112
low power

Hi. I have a 98 Cherokee with 168K on the odometer. For the last couple of months I was experiencing the same loss of power. I was also having starting issues where the engine would crank but not start on the first try. Always started on the second try. Finally, day before yesterday it would not start at all. The fuel pump went out. I suspect that it was gradually going bad causing the lack of power, poor idle and hard starting. After installing the new pump the power is back, idle is smooth and it starts first time every time. What a difference!! Maybe you are having similar symptoms?
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Unread 08-16-2013, 11:41 AM   #6
xjberto
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Join Date: Feb 2013
Location: Maywood, nj
Posts: 27
Sounds like my problem. Getting harder to start. Sometimes just cranks
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