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fairfax
Dodge Dakota
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11/01/2007
08:11:47
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 Subject: Fuel Mix too rich
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Message:
I'm receiving diagnostic trouble codes indicating that the fuel/air mixture on my 96 Dakota 3.9L fuel injected enging is too rich. I've changed both O2 sensors, Idle Air Control Valve, plugs, wires, cap & rotor. Any suggestions?
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searay245se
Dodge Dakota
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11/01/2007
08:24:09
|  RE: Fuel Mix too rich
IP: Logged
Message:
maybe fuel regulator is lettin to much fuel through
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daddio
Dodge Dakota
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11/01/2007
08:40:47
| RE: Fuel Mix too rich
IP: Logged
Message:
could be the MAP sensor or a vacuum leak somewhere.
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fairfax
Dodge Dakota
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11/01/2007
17:36:35
| RE: Fuel Mix too rich
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Message:
Thanks daddio.
The MAP sensor voltages ae all correct and all vacuum lines appear in good shape. Good suction at PCV valve and beather port.
Searay - I don't have equipement to test fuel pressure
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daddio
Dodge Dakota
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11/01/2007
20:32:27
| RE: Fuel Mix too rich
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Message:
have you checked the enigne temp sensor? that could cause an overrich condition.
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Bob Lincoln
Dodge Dakota
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11/02/2007
07:17:03
| RE: Fuel Mix too rich
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Message:
CHECK FAULT CODES.
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Bob Lincoln
Dodge Dakota
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11/02/2007
07:18:19
| RE: Fuel Mix too rich
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Message:
OK, just re-read that you checked codes. Please post what they were.
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fairfax
Dodge Dakota
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11/02/2007
18:34:05
| RE: Fuel Mix too rich
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Message:
MIL code #52 "A rich air/fuel mixture has been indicate by an abnormal lean corrrection factor." Same with scan tool at Advanced Auto Parts. I reset the code and it returned within one day.
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pete
Dodge Dakota
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11/04/2007
21:34:02
|  RE: Fuel Mix too rich
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Message:
Check the wiring that would be carrying 12 volts,but it maybe shorted 12 volt on sensor wire that normally be fed with approx 5 volts from the ECM,shorted to a 12 volt battery postive supply. If you bought a sensor and had to alter your pigtail for new sensor might done this and as daddio saying check that MAP Sensor vacuum line a little stubby one thoughly for cracks and maybe the sensor internally broke it is only a little ceramic wafer and a spring and electrical connector could be Coolant Sensor to but if you are getting P0052 code its something in your 02 sensor 1 in bank 2 also check 02 sensor relay go from there see your finds... Good Luck
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