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eoj
Dodge Dakota
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10/11/2010
06:29:08
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 Subject: Misfire, need good mopar mechanic!
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I have a 2000 dodge dakota 4x4 with a 3.9 LT. V-6
I have a misfire code for cylinder 4 and the check engine light is on. I did a compression test to the motor and a vacuum test and it all looks good. The engine has a very little rough idle but not much and it runs great driving around. But I still have something going on with this misfire, I turn light off and it comes back on. Has anyone had a one cylinder misfire code and figured out what the problem was? Thanks.
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JasonB
Dodge Dakota
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10/11/2010
17:38:19
|  RE: Misfire, need good mopar mechanic!
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Message:
Please post the codes
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JasonB
Dodge Dakota
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10/11/2010
17:50:39
| RE: Misfire, need good mopar mechanic!
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Message:
Not that they will do me much good but I can try a
guess
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JasonB
Dodge Dakota
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10/11/2010
18:41:00
| RE: Misfire, need good mopar mechanic!
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Someone is pretending to be me: Flattery in its sincerest form.
Here's some general info on a few things that could contribute to engine misfire. This isn't a complete list, of course, but some things you can check.
Spark plug (bad/fouled)
Spark plug cables (high resistance/not seated in distributor)
Nominal spark plug cable resistance is 3000 to 12000 ohms per foot (250 to 1000 ohms per inch). If resistance is not within that range, replace the cable.
Distributor cap outside(dirt/cracks/carbon tracks)
Distributor cap inside(dirt/cracks/carbon tracks/rotor button worn or damaged or missing/eroded terminals)
Distributor rotor (insufficient spring tension/cracks/corroded rotor tip)
Camshaft Position Sensor (in the distributor)
The camshaft position sensor provides fuel injection synchronization and cylinder identification. The distributor does not have built in centrifugal or vacuum assisted advance. Base ignition timing and all timing advance is controlled by the Powertrain Control Module (PCM)
Crankshaft Position Sensor (CKP)
Engine speed and crankshaft position are provided through the CKP sensor. The sensor generates pulses that are the input sent to the Powertrain Control Module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing.
Fuel injector (clogged nozzle/bad coil)
The injectors are energized individually in a sequential order by the powertrain control module (PCM). The PCM will adjust injector pulse width by switching the ground path to each individual injector on and off. Injector pulse width is the period of time that the injector is energized. The PCM will adjust injector pulse width based on various inputs it receives.
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Numbnut
Dodge Dakota
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10/11/2010
18:46:17
| RE: Misfire, need good mopar mechanic!
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Message:
check or replace connector at the fuel injector.
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Pole
Dodge Dakota
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10/16/2010
15:57:51
| RE: Misfire, need good mopar mechanic!
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Message:
http://www.dodgedakota.net/boards/gen/27906.html
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