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Unread 07-02-2013, 08:53 PM   #1
TCAdkins
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1989 MJ Comanche 
 
Join Date: Jul 2013
Location: Sierra Vista, AZ
Posts: 11
Accelerating too slow

My 89' comanche seems like it's not taking off fast enough. It bogs down a little when I let off the clutch and give it gas. It's not every single time, maybe 4 out of 5 times. At first I didn't think it was a problem, but it's affecting my off-road capability. Without the acceleration power (because it bogs down) I'm not able to get up hills that would normally be cake.

4.0 L pushing 31" tires if that helps

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Unread 07-03-2013, 08:13 PM   #2
ftpiercecracker
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1990 MJ Comanche 
 
Join Date: Jul 2011
Location: woodbury, Tennessee
Posts: 348
If this is something that has seemed to be slowly getting worse, 9 times out of 10 its going to be the result of a clogged catalytic converter.
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Unread 07-03-2013, 08:53 PM   #3
JeepAbout
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If its a clogged catalytic converter the easiest thing to do is take the side of a hammer and bang on the catalytic converter. The banging should create enough of a vibration to knock whatever might be clogging it loose. Then driving it should work it through your exhaust. You could also buy a can of Seafoam. That will also help clean out your exhaust system. I've had much success with these methods.
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Unread 07-04-2013, 06:14 AM   #4
TCAdkins
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1989 MJ Comanche 
 
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Quote:
Originally Posted by JeepAbout View Post
If its a clogged catalytic converter the easiest thing to do is take the side of a hammer and bang on the catalytic converter. The banging should create enough of a vibration to knock whatever might be clogging it loose. Then driving it should work it through your exhaust. You could also buy a can of Seafoam. That will also help clean out your exhaust system. I've had much success with these methods.
Ill have to try doing that today. What clogs it? I thought just carbon monoxide traveled through their.
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Unread 07-05-2013, 08:37 PM   #5
JeepAbout
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I've read hydrocarbon buildup from different fuel mixtures, among other things but I never really gave it much thought beyond trying to correct the problem and moving on. Sometimes it's hard to determine how serious something is and over thinking the solution will just cost more money so consider a dealership or monkey wrench place as a last resort. If my idea doesn't work theres always other options. This site gave some other ideas: http://www.ehow.com/list_7394440_cat...on-issues.html. Take it for what you will. Good luck
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Unread 08-27-2013, 12:03 PM   #6
TrucksBootsNGun
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1988 MJ Comanche 
 
Join Date: Aug 2013
Location: Flagstaff, ARIZONA
Posts: 46
Might wana check your drivetrain. Mine was doing similar things right up until I shattered a U-Joint doing 85mph 50 miles outside Needles.
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Unread 08-30-2013, 06:05 AM   #7
cruiser54
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1990 MJ Comanche 
 
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 9,976
When's the last time it had plugs, wires, cap and rotor?

Cleaned the throttle body?

Ever click on the link in my signature and do the ground refreshing/upgrades or sensor ground test?
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