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Car Forum / Dodge / Dodge Trucks / August 20071992 Dakota No Start
We have a '92 3.9l 2wd Dakota that won't start. We don't have any voltage on the dark green/orange wire @ the coil, injectors, pin 57 @ the ecm. We have tried another ecm - same problem. All fuses are fine, there doesn't seem to be any broken wires. Any ideas? Thanks in advance. > We have a '92 3.9l 2wd Dakota that won't start. We don't have any > voltage on the dark green/orange wire @ the coil, injectors, pin 57 @ the > ecm. We have tried another ecm - same problem. All fuses are fine, there > doesn't seem to be any broken wires. Any ideas? > > Thanks in advance. Those are all supliied power by the auto shutdown relay. The relay is suplied power by a fuse. Isn't the fuel pump as well? We do have fuel pump. Shouldn't the injectors/coil have ignition voltage? I really appreciate it. >> We have a '92 3.9l 2wd Dakota that won't start. We don't have any >> voltage on the dark green/orange wire @ the coil, injectors, pin 57 @ the [quoted text clipped - 5 lines] > Those are all supliied power by the auto shutdown relay. The relay is > suplied power by a fuse. > Isn't the fuel pump as well? We do have fuel pump. No, the fuel pump is powered by the fuel pump relay. Both the fuel pump relay and auto shutdown relay are fed by the same fuse and activated by the ECM on a single wire. From what you are saying you have a bad auto shutdown relay or an open wire to the relay. Shouldn't the > injectors/coil have ignition voltage? Ignition voltage ??? Not sure what you mean by ignition voltage but the injectors and coil should both have 12 volts. These are powered by the auto shutdown relay. > I really appreciate it. So the dark green/orange @ the coil/injectors is an input to the ecm? I was told it was an output. If I put power to that wire at the coil, the injectors get power as well as the ecm and right over to the relay box on the left front fender. Still no start. We have no injector pulse during crank with that wire manually powered up as well. The ecm originally called for crank sensor and cam sensor. Both were changed. Thanks again. >> Isn't the fuel pump as well? We do have fuel pump. > [quoted text clipped - 11 lines] > >> I really appreciate it. Did the vehicle ever run after they were changed?  SignatureIf at first you don't succeed, you're not cut out for skydiving > So the dark green/orange @ the coil/injectors is an input to the ecm? > I was told it was an output. If I put power to that wire at the coil, the > injectors get power as well as the ecm and right over to the relay box on [quoted text clipped - 18 lines] > > > >> I really appreciate it. No. The first problem was distributor. The distributor got all piled up inside. It was changed. The codes were after this. We are wondering if the distributor problem has caused some other damage. All fuses are good, all splices seem intact under the hood. Thanks . > Did the vehicle ever run after they were changed? > [quoted text clipped - 28 lines] >> > >> >> I really appreciate it. Then the distributor is where I would concentrate your efforts. The Auto Shutdown Relay is controlled by the PCM and IIRC, it activates it when it see's a signal from the position sensor in the distributor. If the PCM is not seeing this signal, it will not activate it and even of you bypass this by connecting voltage directly, it still will not send any pulse signals because it doesn't know that the engine is cranking. SignatureIf at first you don't succeed, you're not cut out for skydiving > No. The first problem was distributor. The distributor got all piled > up inside. It was changed. The codes were after this. We are wondering > if the distributor problem has caused some other damage. All fuses are [quoted text clipped - 32 lines] > >> > > >> >> I really appreciate it. Thanks. Tomorrow's planned. > Then the distributor is where I would concentrate your efforts. The Auto > Shutdown Relay is controlled by the PCM and IIRC, it activates it when it [quoted text clipped - 46 lines] >> >> > >> >> >> I really appreciate it. One more thing, what is the battery voltage when cranking? SignatureIf at first you don't succeed, you're not cut out for skydiving > So the dark green/orange @ the coil/injectors is an input to the ecm? > I was told it was an output. If I put power to that wire at the coil, the > injectors get power as well as the ecm and right over to the relay box on [quoted text clipped - 18 lines] > > > >> I really appreciate it. > So the dark green/orange @ the coil/injectors is an input to the ecm? It is a 12 volt feed wire coming from the shutdown relay. It powers the injectors, coil and ECM. > I was told it was an output. No. If I put power to that wire at the coil, the > injectors get power as well as the ecm and right over to the relay box on > the left front fender. You need to find out why it has no power on it's own. Still no start. We have no injector pulse during > crank with that wire manually powered up as well. You may have a wiring harness problem, I would fix the no power from the auto shutdown relay first. The ecm originally called > for crank sensor and cam sensor. Both were changed. Did the engine ever run at all ??? If yes was it before or after the cam and crank sensors were replaced ? > Thanks again. >> [quoted text clipped - 13 lines] >> >>> I really appreciate it. To Mike and TBone: Thanks for your help. >> So the dark green/orange @ the coil/injectors is an input to the >> ecm? [quoted text clipped - 41 lines] >>> >>>> I really appreciate it. > To Mike and TBone: Thanks for your help. What turned out to be the problem ?? >>> So the dark green/orange @ the coil/injectors is an input to the >>> ecm? [quoted text clipped - 41 lines] >>>> >>>>> I really appreciate it. There is a broken pin within the distributor. It hasn't been repaired yet but, it looks like the right direction. I'll keep you posted. Thanks again. >> To Mike and TBone: Thanks for your help. > [quoted text clipped - 45 lines] >>>>> >>>>>> I really appreciate it. your are welcome and good luck. SignatureIf at first you don't succeed, you're not cut out for skydiving > There is a broken pin within the distributor. It hasn't been repaired > yet but, it looks like the right direction. I'll keep you posted. Thanks > again. [quoted text clipped - 48 lines] > >>>>> > >>>>>> I really appreciate it. |
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