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  #1  
Old 06-06-2015, 08:01 AM
tmanly tmanly is offline
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Join Date: Feb 2014
Posts: 5
Default 99 Ranger 4x4 4.0 codes

My Ranger has started stuttering when going up a hill at speed (55)
It seems to be getting worse. If I press down and go into passing, it smooths out and does OK.

I ran a scan for codes and got the following
P1131
P1151
P1132

Do all these codes point to a certain problem?

As a note: I also noticed tat it idles different sometimes.

Thanks
Tom
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  #2  
Old 06-06-2015, 11:22 AM
adsears1 adsears1 is offline
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Default

Mine idled weird for 10 years. I replaced (2) O2 sensors and EGT valve. Problem solved. 40 miles per tank gas mileage improvement too.
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  #3  
Old 06-07-2015, 08:54 AM
cowboybilly9mile cowboybilly9mile is offline
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Posts: 4,900
Default Re: 99 Ranger 4x4 4.0 codes

First thing to do in diagnosing a problem is to visually inspect the things that can cause it, and if anything is obviously damaged, repair/replace it. Do this carefully and thoroughly. Then take a test drive to verify that the problem is fixed.

Have you done this first step?
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