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General Dakota Board
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Clark
Dodge Dakota
JOIN HERE
9/27/2005
11:08:32
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 Subject: 93 code 27, can't fix injectors
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Message:
Hi guys, I have a '93 Dakota LE 2WD with a 318 under the hood. I can't get rid of this code 27. Here's some details...
I first got a code 27 about a month ago (the code actually showed up twice). I changed the fuel injectors with some fuel injectors I got from a 95 Crown Vic. Still got a code 27, so I changed them all again using another Crown Vic. Still got a code 27... and yes I reset the computer after both times.
Sometimes my truck runs great, other times not so great. I could smell gas, so I pulled out the spark plugs and they're all looking pretty good except for one of them has gas on it. I changed that injector again, nothing. It makes me think that the injector is getting stuck "open" and more than necessary gas is coming out. I checked the SMEC and everything in there looks good.
What's next? is it just a bad spark plug/wire? It couldn't be that simple could it?
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spt
Dodge Dakota
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9/27/2005
11:56:51
| RE: 93 code 27, can't fix injectors
IP: Logged
Message:
Fault Code 27
Synopsis
Description: Injector driver circuit 2 open or shorted
Power loss light: Off
Limp-in mode: None
Possible Causes
Bad connection or wiring - Check the wiring and connections to injectors 3 and 4 in the injector harness (above the fuel rail) and between the harness and the power module (or SMEC) and the injector contol lines between the logic module and power module. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.
Injector driver transistor failure - Check the injector signals coming from the power module (or SMEC). They should rise to about 12V when the injector is off and drop close to 0V when the injector is on. If they are out of spec, you may need to replace the power module.
Diagnostic Method
Trigger Parameters
- Near 0V or near 12V not detected when the injector driver is turned on or off, respectively
Results If Component Fails
Fault code 27 is stored.
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Clark
Dodge Dakota
JOIN HERE
9/27/2005
18:09:53
| RE: 93 code 27, can't fix injectors
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Message:
Well I checked the wiring back to the SMEC and couldn't find any problems there. I also took a small strip off of the 2 wires coming out of the injector and tested it with a Voltmeter. When the truck is running the voltage is about 0.2 V, when the truck was off it was 0V.
Did I hook the Voltmeter to the wrong wires?
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