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Thanks for the right on comments Deasiel..I found an excellent wiring diagram on another chat and I can see if you power the feed to the fuel pumps they will come on, its a direct connection. And this convinces me that the FPs must, one of them... be bad. You can go direct from the battery post to the FP feed to the pumps and they must come on or as you say, bad wiring somewhere..So I dont need to puzzle over the ECU which is not involved..
I will post the excellent link to that wiring diagram here on my next message..someone shared it in reply to another issue yrs ago..
Its strange..I DIS connected one FP and then the car ran, with one pump..then I tested that pump and could find nothing wrong with it and reinstalled and all was good, but I suspect its grounding out and stopping both pumps with intermittent failure..the meter showed continuity across the entire pump, both posts to the case and each other..yet it worked great when connected to a battery. The new pump does not show this pattern at all..So I will get the new pump installed and test again! Very hopeful this resolves it..
And yes its a 95 with the eco junk wiring but they say the chassis wiring doesnt crumble, yet in high heat areas it may..such as the fuel pumps if it goes near exhaust on the way..
Back with that diagram and to complete the story.. Still curious how the ECU "knows" to turn off the fuel pumps when the engine is off ...Looking at the wiring diagram may hold a clue or it could be a timer circuit..activated in the absence of the CPS signal..
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