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Microtech Fuel pump issue

Old 06-24-07, 10:18 AM
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Lightbulb Fuel pump issue

93 FD. Car was tuned 1 month ago by BDC, And ran outstanding. It was a nice day so I decided to drive it to work. As I left my driveway, it bucked once and ran fine for about a mile. All of a sudden the motor quit, ran, quit....all the way back home, about 3 miles, and died in my driveway. I tracked it down to zero fuel pressure. I checked the fuel pump relay and there was no power to it. I evn pulled the relay cover, manually engaged it and still no pump. All fuses check out fine. Next step was to run a power line and 15a switch directly to the pump. All is well now, car runs same as it did, with the exception of higher boost,15psi, the afr goes pig rich to the point of constant rich misfire. I did not change anything in maps since bdc tuned me. With my limited electrical knowledge, I followed the microtech schematic to the pump output lead and found 0 voltage with the ignition on. Question is, Microtech guru's, does it sound like the ecu has internal issues which would require it to fly back to Austrailia for a check-out? Thanks for your help.
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Old 07-04-07, 12:06 AM
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On your fuel pump relay.

This is how it has to be.

Pin 87 goes to live power
Pin 86 goes to green wire on microtech and is an earth trigger
Pin 85 goes to pink wire (or any ignition wire)
Pin 30 goes to fuel pump

so 87 has to have 12v all the time, pin 85 has to have 12v on ignition,. if both of these have power and still no fuel pump. get an earth wire and ground pin 86 and if the fuel pump switches on the trigger inside the comptuer has burnt out and computer will need to go back to aus.
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