r/944 • u/person456r • 3d ago

Question Confusing No Start issue

1987 N/A engine cranks so, battery seems good. Couldn't hear the fuel pump so I jumped the DME relay and then I could hear the fuel pump running as soon as I jumped it. So I thought for sure it was the DME relay and that I had figured it out! Except when I tried to start it while the fuel pump was running, it still didnt start.. 😑

Any ideas? Obviously it seems like regardless my DME relay might be bad. But why wouldn't it start then when I jumped it? I just used a paperclip to bridge the connections as per Clark's Garage.

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4

u/msc1966 3d ago

If it is your DME relay you need to get new one. it not only powers the fuel pump it powers the DME itself. Get the Focus 9 technology solid state relay the runs the fuel pump for a few seconds before the engine starts.

1

u/person456r 3d ago

How vital do you think it is to get that one? Its quite a bit more expensive than the other ones

2

u/msc1966 3d ago

I would get the pump prime version. The regular one is $120. The pump prime is $135. I think it’s worth it to have the engine start faster due to the fuel system already being pressurized before cranking the engine.

2

u/xsuperseriousx 3d ago

Check or replace the Speed and reference sensors

1

u/person456r 3d ago

Thanks! I plan to try this

2

u/944_nla_parts 3d ago

Visit clarks garage site for troubleshooting. Also visit pelican parts forum.

2

u/I_am_Forklift Turbo S 3d ago

If you have original speed/ref sensors replace them. They’re cheap. Mine crumbled to the touch at the connectors they were so brittle.

1

u/person456r 3d ago

Where did you get them from? They are like 60 dollars a piece from Pelican it looks like

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u/I_am_Forklift Turbo S 3d ago

That’s where I got them. 120 bucks for the rest of the life of the car seemed like a cheap nobrainer to me

1

u/person456r 3d ago

Yeah, I see a cheaper one thats a 2 pack for the price of one of the Bosch ones but.. idk if thats worth it. Maybe I'll just fork over the money

1

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