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Old Mar 26, 2011 | 11:20 AM
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Cool 98 ram

hi my name is Dan and i have a 98 ram 1500 ex cab. it has the 5.9 in it.

my ram has a rough idle when its at an idle after i start or at a stop sign. i did replace the plugs, wires, cap and rotor, plus fuel injector cleaner every 3000 mile. can anyone give me any more ideas?
 

Last edited by 1969CoronetR/T; Mar 26, 2011 at 11:48 AM.
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Old Mar 26, 2011 | 11:51 AM
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Welcome to the site. I will move this thread to the second generation Ram section,
FF
 
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Old Mar 26, 2011 | 12:53 PM
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Check the Plenum.

How did your old plugs look?
 
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Old Mar 26, 2011 | 12:56 PM
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If the plugs look good, I'd check the IAC or TPS next. Both easy to do, relatively cheap replacements.
 
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Old Mar 26, 2011 | 04:23 PM
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the plugs looked decent. i ill have to try what you said. i was thinking its out of time a little bit or 1 of the injectors my be bad. im not sure if those would make it have a rough idle or not. i have a snapon 2500 scanner that i put on the truck and the scanner doesnt show any codes.
 

Last edited by dan64779; Mar 26, 2011 at 04:35 PM.
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Old Mar 26, 2011 | 05:53 PM
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If it idles rough after its been running a few minutes, probably the pre-cat O2. If it runs rough ALL the time..... need to check the plenum.
 
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Old Mar 29, 2011 | 10:05 AM
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Welcome to the site
 
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