1993 Dakota 2wd 3.9 engine code27. PLEEASE HELP!!
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1993 Dakota 2wd 3.9 engine code27. PLEEASE HELP!!
I have a 1993 Dakota giving me a Code 27- injector 6 control circuit.
I changed the coolant temp sensor, computer, all injectors, all sparkplugs and wires are good, cap and rotor, new exhaust system, O2 sensor, new fuel pump.
All injectors except #6 are getting a little under 2 volts. Injector 6 is getting 13+.
Trucks runs OK on a cold start, but after 5min-30mins is seems to struggle to maintain speed. It started stalling when I come to a stop and when I go to accelerate, it either stalls, or almost stalls then slowly gains speed. It also run VERY rich. Any help is Greatly appreciated!
I changed the coolant temp sensor, computer, all injectors, all sparkplugs and wires are good, cap and rotor, new exhaust system, O2 sensor, new fuel pump.
All injectors except #6 are getting a little under 2 volts. Injector 6 is getting 13+.
Trucks runs OK on a cold start, but after 5min-30mins is seems to struggle to maintain speed. It started stalling when I come to a stop and when I go to accelerate, it either stalls, or almost stalls then slowly gains speed. It also run VERY rich. Any help is Greatly appreciated!
Champion
Joined: Jan 2013
Posts: 4,737
Likes: 374
From: Northwest Louisiana
Actually, all the injectors should be getting 12V, but pulsed.
Sounds like Injector 6's output from the ECU is shorted, keeping it hung open.
Since the ECU grounds the return (all the injectors are at 12V all the time the ASD is on, but the ECU grounds to complete the circuit), it sounds like you've lost the injector driver for injector 6.
Can you grab a spare ECU out of the boneyard for not-too-much and try a swap?
Past that, a set of NOID lights should show blinking for all six injectors. I will bet that injector 6 is hot all the time, the other 5 will blink.
RwP
Sounds like Injector 6's output from the ECU is shorted, keeping it hung open.
Since the ECU grounds the return (all the injectors are at 12V all the time the ASD is on, but the ECU grounds to complete the circuit), it sounds like you've lost the injector driver for injector 6.
Can you grab a spare ECU out of the boneyard for not-too-much and try a swap?
Past that, a set of NOID lights should show blinking for all six injectors. I will bet that injector 6 is hot all the time, the other 5 will blink.
RwP
