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Join Date: Nov 2003
Location: Baytown, TX
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ok getting close
redid all the vacuum lines... still same problem... now testing injector wiring... when you disconnect the injector should both of the pins inside have 12v? when all injectors are unplugged one pin has 12v.... when you plug in one.. both pins in all injectors have 12v
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85.5 944 N/A, auto Last edited by SuperDave; 12-29-2003 at 05:50 PM.. |
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12-29-2003, 05:06 PM
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also where does the DME ground the injectors?
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85.5 944 N/A, auto |
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12-29-2003, 05:34 PM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
Posts: 6,676
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with ignition on, one should have battery voltage (12V ~) and the other should be at 10V (voltage coming from DME)
SoCal could be of great help here, as I don't know whether the DME will send voltage if only one injector is plugged in, or if the DME voltage should drop to 0 when all are unplugged. (I believe that is what you are describing) lessee what the trusty FWSM sez...
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12-29-2003, 10:59 PM
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Been a rash of injector wiring problems here and on rennlist lately. Ronin got it right. But I think that the 10 volts is the still connected injector wiring kicking down the 12 volts as the DME should have little to any voltage coming accross the transistors. Wilks???
On railed's thread I went through a harness testing procedure to see if the harness has shorted through. Involves pulling the plug on the DME and testing the voltage at the plug's pins. The DME has several ground wires that go to the chassis. I think it also grounds through it's case. I'll check the electrical diagrams.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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12-30-2003, 03:57 AM
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did you find out anything from the diagrams?
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85.5 944 N/A, auto |
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12-30-2003, 04:46 PM
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From what I can read looks like 5, 16, 17, 19, 28. Where they ground I haven't figured out yet. Think I have the DME plug end from the 86 I parted. I may have to look at it.
Still these grounds may not be common to the DME. As in Wilks relating that the 'S' DME has a ground trace between ground wires that burns through when jumping the car to start it.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! Last edited by SoCal Driver; 12-30-2003 at 09:38 PM.. |
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12-30-2003, 05:30 PM
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ok those are the only grounds on the DME... i am also getting a ground through the #4 pin... the chart shows that is the starter signal.. should that be grounding out?
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85.5 944 N/A, auto |
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12-30-2003, 06:16 PM
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Quote:
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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12-30-2003, 09:38 PM
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1983 Porsche 944 2.5 liter
