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02 Dakota 6cyl rough idle/backfires/cuts out
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JimmyCrown
Novice
Nov 8, 2009, 2:48 PM
Post #1 of 9
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02 Dakota 6cyl rough idle/backfires/cuts out
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2002 Dakota 6 cylinder.........intermittent problem, idles rough then when driving and accelerating it backfires and cuts out..........cannot maintain a 50-60 mph speed w/o cutting in and out. Then if I disconnect just one of the injector plugs momentarily .............it will run fine until the ignition is turned off and then started up again. Then it does the same thing!! Ideas anybody?
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Loren Champlain Sr
Veteran
/ Moderator
Nov 8, 2009, 4:46 PM
Post #2 of 9
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Re: 02 Dakota 6cyl rough idle/backfires/cuts out
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Jimmy; Your '02 Dodge computer has misfire detection. If you have a cylinder misfiring for whatever reason, it should turn on the check engine light, and store the trouble code in memory. Have the code, or codes, retrieved and post them for us. Most parts stores will do this for free. Just don't let them sell you any parts at this point.
Loren
SW Washington
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JimmyCrown
Novice
Nov 8, 2009, 5:27 PM
Post #3 of 9
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Re: 02 Dakota 6cyl rough idle/backfires/cuts out
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Thank you sooooooo much for your reply. In checking the computer faults that come up on the instrument panel readout......... bearing in mind that I have NOT reset the PCM memory since I disconnected the injector plug enabling the engine somehow to run smoothly w/o problems......
The fault codes that came up were,
P0202
P0123
P0128
I do have the book and will look them up but, would sure appreciate your opinion/feedback also...
Thanks and Best Regards, JC
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Loren Champlain Sr
Veteran
/ Moderator
Nov 8, 2009, 5:40 PM
Post #4 of 9
(2786 views)
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Re: 02 Dakota 6cyl rough idle/backfires/cuts out
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Jimmy; The P0202 is injector #2 circuit. You may have 'induced' this code by disconnecting it. The P0123 is TPS (throttle position sensor too high). I'm hesitant to tell you to replace the sensor, but it does match the symptoms. If you have an ohmmeter, you can test it. While very slowly 'sweeping' the sensor, watch for any 'glitch' in the readings. The resistance will climb as you go from the stop to wide open throttle. (Of course, do this with the ignition OFF). Also, watch it as you go from WOT back to the stop.
Loren
SW Washington
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JimmyCrown
Novice
Nov 8, 2009, 5:52 PM
Post #5 of 9
(2784 views)
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Re: 02 Dakota 6cyl rough idle/backfires/cuts out
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Awesome I will put a meter to it shortly.......................
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JimmyCrown
Novice
Nov 8, 2009, 5:53 PM
Post #6 of 9
(2783 views)
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Re: 02 Dakota 6cyl rough idle/backfires/cuts out
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And the 128?
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Loren Champlain Sr
Veteran
/ Moderator
Nov 8, 2009, 5:59 PM
Post #7 of 9
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Re: 02 Dakota 6cyl rough idle/backfires/cuts out
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Jimmy; I didn't find a 'description' for P0128. May be a false code or manufacturer specific?
Loren
SW Washington
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JimmyCrown
Novice
Nov 8, 2009, 6:42 PM
Post #8 of 9
(2778 views)
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Re: 02 Dakota 6cyl rough idle/backfires/cuts out
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OK thx so much!! Gonna bust out the meter at half-time! I'm a die hard Cowboy fan. JC
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JimmyCrown
Novice
Nov 8, 2009, 8:23 PM
Post #9 of 9
(2769 views)
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Re: 02 Dakota 6cyl rough idle/backfires/cuts out
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Hooked up the meter to the TPS and got a smooth sweeping reading thru the entire range ...................next ?
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