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 Fuel Pressure and Map Sensors issues

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cincykid0003



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Join date : 2011-11-25

PostSubject: Fuel Pressure and Map Sensors issues   Fri Nov 25, 2011 9:03 pm

I have been having issues where either both or these sensors are ready or both of them are not. I checked the grounds made sure that everything is hooked up correctly. Its only these two sensors that arent workign correctly. The car was running just fine and now all the sudden this is whats happening. Can someone please help me out with some suggestions thanks.

95 Supra Single 6-Speed
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Join date : 2008-02-22

PostSubject: Re: Fuel Pressure and Map Sensors issues   Sun Nov 27, 2011 3:29 pm

cincykid0003 wrote:
I have been having issues where either both or these sensors are ready or both of them are not. I checked the grounds made sure that everything is hooked up correctly. Its only these two sensors that arent workign correctly. The car was running just fine and now all the sudden this is whats happening. Can someone please help me out with some suggestions thanks.

95 Supra Single 6-Speed

If you are losing both sensors, you have a wiring issue, and it is either the 5v ref, or sensor ground, so check your wiring.
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cincykid0003



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Join date : 2011-11-25

PostSubject: Re: Fuel Pressure and Map Sensors issues   Sat Dec 10, 2011 3:30 pm

re ran the wiring. Issue is still occuring. The sensors wont start working till after the car has been running for 20 minutes or so. I think something is wrong with the box.
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PostSubject: Re: Fuel Pressure and Map Sensors issues   Sat Dec 10, 2011 3:59 pm

cincykid0003 wrote:
re ran the wiring. Issue is still occuring. The sensors wont start working till after the car has been running for 20 minutes or so. I think something is wrong with the box.


It's not the box....otherwise it would NEVER work. Not to mention we have yet to have even 1 failure. These ecu's go through some pretty extensive testing before they ever ship.

Pressure sensors should have one signal wire going to the input of the ecu that you assigned or was assigned in the calibration, one wire going to 5v reference FROM the ECU, and one wire going to the SENSOR ground at the ECU. At no time should you have continuity between any of the 3.
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