92 Dakota misfire code 27
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92 Dakota misfire code 27 - 6/17/2007 11:53:19 AM
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hemispheres
Posts: 27
Joined: 6/17/2007
Status: offline
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Hello to all. I just recently joined and I am posting my first question. My 1992 Dakota, 3.9L 2WD has developed a engine misfire. The truck has 221,230 miles and this is the first problem encountered with said truck.
During idle, off idle, or cruise the engine will stumble, feels like a dead cylinder and check engine light illuminates. The condition is erratic, will run okay for a couple of days and then the problem returns. I scanned the engine computer numerous occasions at O'Reilleys and consistently read code 27, left bank misfire, input signal low or not detected, cylinder one misfire.
At this point I have replaced the fuel filter, ignition coil, plugs, plug wires, rotor, distributor cap, crankshaft position sensor, thermal temp switch and removed and cleaned the idle air control valve, and throttle position sensor indicator.
I feel the ignition system is the culprit. In the driveway when the problem occurs, I detect the smell of an excessively fat, rich mixture which would suggest that the injectors are delivering fuel but not receiving spark.
I am at wits end. Should I replace the distributor next. I opened up the Schrader valve on the fuel rail near the intake manifold and gas shot towards the firewall so I think fuel pressure is okay.
I realize this is long winded, please help. Thanks
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RE: 92 Dakota misfire code 27 - 6/22/2007 3:58:35 PM
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hemispheres
Posts: 27
Joined: 6/17/2007
Status: offline
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Bump. Anyone? Help? Thanks
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RE: 92 Dakota misfire code 27 - 7/2/2007 8:44:05 AM
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hemispheres
Posts: 27
Joined: 6/17/2007
Status: offline
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Okay. Now I replaced the hall effect pickup assembly in the distributor, still getting the random engine roughness followed by the CEL and then code 27. I opened the wire bundle under the relay box and found dirt and moisture in the wire loom . I repaired some of the splices and it ran okay for about one day and now the condition has returned. Maybe I am on the right path.
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RE: 92 Dakota misfire code 27 - 7/5/2007 12:04:32 PM
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92DAK360
Posts: 3
Joined: 7/5/2007
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RAN INTO THIS MYSELF. WAS TOLD TO REPLACE ECM. SO I DID THAT WITH THE PERFORMANCE ONE FROM MOPAR. WELL THAT WORKED FOR ABOUT A MINUTE AND DID THE SAME THING. FOUND INJ#3 WAS FIRING AS A STRAIGHT ON SHOT WITH NO PULSATION. SO IN OTHER WORDS COMPUTER WAS BAD AGAIN...NO WARRANTY ON PERFORMANCE PARTS...SO WHAT I DID WAS TAP OFF OF CYL#1 INJ BECAUSE THEY ARE A BATCH FIRE. SO FAR RUNS AWESOME...I DO LIKE THE PERFORMANCE COMPUTER....BUT WHY THE INJECTOR KEEPS DOING THIS I HAVE NO CLUE...AND I DID CHECK RIGHT OFF OF THE COMPUTER ON THE INJECTOR PULSE SO I KNOW ITS INTERNAL. HOPE THIS HELPS SOME
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RE: 92 Dakota misfire code 27 - 7/5/2007 12:28:11 PM
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hemispheres
Posts: 27
Joined: 6/17/2007
Status: offline
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Thanks 92Dak. I replaced the TPS and the ECM temperature switch. As of this writing the problem has not reoccurred.
I also spent considerable time opening up the wire bundle under the relay panel in the engine compartment looking for corroded splices.
I am not one for liquid remedies, but none the less I tried a can of Seafoam in the gas tank.
I honestly feel the engine is running better than before the problem occured.
Items replaced in my trouble shooting, parts replacement mission. Plugs, plug wires, rotor, dist. cap, dist pickup assembly, ignition coil, crankshaft position indicator, idle air control valve, throttle position sensor, intake air temp switch, fuel filter and ecm coolant temp switch.
Other than normal maintenance items, this is the most I have spent on this truck in the last five years. I feel it was money well spent. I will keep you posted.
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RE: 92 Dakota misfire code 27 - 9/26/2007 7:40:03 AM
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joecornish
Posts: 13
Joined: 3/12/2007
Status: offline
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quote:
ORIGINAL: 92DAK360
RAN INTO THIS MYSELF. WAS TOLD TO REPLACE ECM. SO I DID THAT WITH THE PERFORMANCE ONE FROM MOPAR. WELL THAT WORKED FOR ABOUT A MINUTE AND DID THE SAME THING. FOUND INJ#3 WAS FIRING AS A STRAIGHT ON SHOT WITH NO PULSATION. SO IN OTHER WORDS COMPUTER WAS BAD AGAIN...NO WARRANTY ON PERFORMANCE PARTS...SO WHAT I DID WAS TAP OFF OF CYL#1 INJ BECAUSE THEY ARE A BATCH FIRE. SO FAR RUNS AWESOME...I DO LIKE THE PERFORMANCE COMPUTER....BUT WHY THE INJECTOR KEEPS DOING THIS I HAVE NO CLUE...AND I DID CHECK RIGHT OFF OF THE COMPUTER ON THE INJECTOR PULSE SO I KNOW ITS INTERNAL. HOPE THIS HELPS SOME
Is your fix (tapping into another cyl in the batch) still working? The dealership told me today that my Power Control Module has a bad connection for one of the cyls, and is not spraying fuel at all for that cyl. The injector is ok (they put it on another cyl and it worked fine). They wanted $850 to put in a new PCM and clean the fuel delivery system, but if I can tap into another cyl, that would save me a heck of a lot of money. Has anyone else ever tried this remedy?
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92 Dakota, 3.9L V6, Extended Cab
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