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Idle issues

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Old Oct 14, 2018 | 01:20 PM
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Default Idle issues

I made a post last night about injector part numbers so you know where my mind is at. My truck, 2001 ram 5.9 v8, has had a rough idle since I bought it. I did I fill tune up and replaced all sensors on tb and o2 sensors, I put a cai on it because 50$ In Amazon is a steal and I still have a rough idle. I’m down to “is it an injector that has a bad pulse at idle” or “is the distributor dying after 17 years and 190k” I have a distributor brand new for free So I’m going to try that what’s the worst that could happen but what do you guys think? Just to cover all bases I’ve regaped the plugs many times no change.
 
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Old Oct 14, 2018 | 01:29 PM
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Might try running some injector cleaner for 4-5 tanks and see if anything improves.
 

Last edited by racefan41; Oct 14, 2018 at 02:00 PM.
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Old Oct 14, 2018 | 03:09 PM
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Originally Posted by racefan41
Might try running some injector cleaner for 4-5 tanks and see if anything improves.

yeah I’ve run a cleaner a few times but nothing changed
 
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Old Oct 14, 2018 | 06:21 PM
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I would suggest a throttle body clean especially at the idle air control valve. if that doesn't help replace the valve.
 
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Old Oct 14, 2018 | 06:54 PM
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Originally Posted by Torxhead
I would suggest a throttle body clean especially at the idle air control valve. if that doesn't help replace the valve.
that was replaced when the truck wouldn’t start and I cleaned the throttle body when I did it. I wish it was that easy
 
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Old Oct 14, 2018 | 08:29 PM
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The easy stuff is a good place to start. The coil resistance check, I guess would be next on the list.
 
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Old Oct 16, 2018 | 12:09 AM
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A new distributor or a new distributor cap??? Certainly replace the cap and rotor and add a new good quality set of plug wires. I've seen lot of bad plug wires and I'm surprised that a lot of people don't replace them more often. The coil should be okay if it runs well when you put your foot into it. I like the idea of injectors when all else has failed. Do a compression test. 190K is prime for valves/valve seat issues on any engine.
 
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