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Join Date: Sep 2010
Location: Las Vegas, NV
Posts: 2,177
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Quote:
Originally Posted by naples911 View Post
The DME relay is the one next to the ECU beneath the driver's seat, correct? I changed this out but referred to it as the fuel pump relay. After a little research, i guess the fuel pump relay is the red relay under the hood. Do those go bad and if so how would i know?
Naples -- Here's a FP electrical diagram that may help:



Fuel pump pressure testing is described in much detail in Bentley, 240-5. Should be getting:

~36 psi engine off
~29 psi engine running
~33-39 psi engine running w/disconnected vacuum hose to FPR

Quote:
Originally Posted by naples911 View Post
Scott, how did you check the sensors in the engine bay? Thanks, i'm suspicious of that speed sensor as it's the only sensor that hasn't gone yet.

Keep you posted, thanks for the replies!
Am pretty sure speed sensor affects running condition, while reference sensor affects start/no-start condition. See:



Good luck; keep us posted.

Dale
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Dale
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Old 06-01-2012, 05:25 PM
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