Question about 1998 Dodge Ram 1500 4WD

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1998 Dodge 1500 Extended cab 4wd 5.9 Magnum motor Approx 115k miles. Mostly highway driving Check engine light, was coming on and then clearing by itself after a week or so. Started a few months ago. Was one most of last week, cleared on it own Saturday night, then came back on Sunday after a few trips. I can clear by disconnecting battery, generally returns after a few days of driving. Last code pulled a few weeks ago was 301 ? Cylinder 1 misfire ? Prior to replacing stuff mentioned below. I have not seen the check engine light flash. In an effort to resolve I replaced plugs, wires, cap, rotor and PCV a few weeks ago, no noticeable issues on old plugs, Occasional feel of a miss or stumble, generally when stopped, in gear and brake on. Tried pulling a few different plug wires, one at a time to see if there was noticeable change in idle. I was not able to notice a significant difference. Past history Catalytic convertor was replaced with after market (Midas) within the past few years ? old one was clogged and truck was not drivable at that time. O2 sensor (front, I think was also replaced at that time since the original was stripped)

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  • kev442 May 11, 2010

    Sounds more like an EGR issue to me.

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Go here and follow the instructions, it worked for me.


Dodge 1995-1999 V8 sparkplug wiring.

http://dodgeram.info/tsb/1998/18-48-98/18-48-98-v8.htm

Posted on Jul 08, 2009

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There may be a software update for the powertrain control module for mis-fire monitor. check with your local dealer. but if thats not the case,these engines are known at least in my experience of having the heads crack between the valves and cause mild mis-fires. try compression testing all the cylinders and performing a leakdown test on them as well.

Posted on May 12, 2009

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