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cotbu · 10-19-2011, 07:19 PM

Lil confused, so do this for me.
Disconnect the ecu harness , remove the egi pump/fuel pump relay.

Code:

  [1]  [2]
   [3][4]

Looking into the relay socket, test pin 1 to pin 104 on the ecu for continuity.
Then de-pin pin104 from ecu plug put the relay back into the socket turn key on, with ecu still disconnect. Touch the wire (104) to ground. the pump should come on.

This means the problem is in the ecu. probably more convenient to replace the ecu than to have it repaired.

Not gonna lie. These test are tedious. And mostly every time the ecu is the problem, but rare cases it cost nothing to fix.

So you could just pop in another ecu, after you determine the cause is not a short in the wiring. usually there are signs of a broken trace or someone says I hooked my battery cables up backwards or I dropped a wrench and blah blabbity blah.

10-19-2011, 07:19 PM	#11
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3)	Lil confused, so do this for me. Disconnect the ecu harness , remove the egi pump/fuel pump relay. Code: [1] [2] [3][4] Looking into the relay socket, test pin 1 to pin 104 on the ecu for continuity. Then de-pin pin104 from ecu plug put the relay back into the socket turn key on, with ecu still disconnect. Touch the wire (104) to ground. the pump should come on. This means the problem is in the ecu. probably more convenient to replace the ecu than to have it repaired. Not gonna lie. These test are tedious. And mostly every time the ecu is the problem, but rare cases it cost nothing to fix. So you could just pop in another ecu, after you determine the cause is not a short in the wiring. usually there are signs of a broken trace or someone says I hooked my battery cables up backwards or I dropped a wrench and blah blabbity blah. __________________ LoverTechnologies "Half Broken Things!"