simdel1
New member
After a very extended break to deal with children/house/work and other grown up stuff, I'm now in the process of trying to recommission my old 944. Unfortunately it now wont start. It's cranking but making no attempt to fire
So far, I have:
However, I'm concerned about the DME situation. Everything I've done seems to suggest that the relay is fine, but I have to bypass it to get the engine to try to run. This leads me to suspect the DME controller itself is potentially at fault (I assume the DME provides one of the low-side inputs to the DME relay to activate the pump?). Is there a way I can confirm or eliminate the DME controller from my investigations?
So far, I have:
- Confirmed that the fuel pump is working, but only when I bridge the DME relay pins
- Tried the DME relay paper-clip trick which meant that it started to fire, but it sounded like it was only trying to fire on 1 cylinder.
- Tested the DME relay as per the Clarks garage tutorial which seemed to suggest that it was working fine. (both relays within the DME relay module seem to operate correctly when power is applied)
- Checked for leaking injectors by removing the rail and injectors and bridging the pump relay pins as described in Clarks garage. No leaks that I can see.
However, I'm concerned about the DME situation. Everything I've done seems to suggest that the relay is fine, but I have to bypass it to get the engine to try to run. This leads me to suspect the DME controller itself is potentially at fault (I assume the DME provides one of the low-side inputs to the DME relay to activate the pump?). Is there a way I can confirm or eliminate the DME controller from my investigations?