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  1. A

    5v ref issue

    Let me back up Let me back up and ask this...there are 2 plugs to the ecm...so is one plug 5v ref1 and the 2nd plug is 5v ref 2 I guess I'm thinking just to back up to beginning and go back thru it all
  2. A

    5v ref issue

    It does help another. Also all these are giving 5.5 v for both ref 1 and ref 2....any ideas on what would make it be above normal.
  3. A

    5v ref issue

    So I spent a few hours starting at the cam sensor following wires back tonecm plug, then following additional wire in the plug pin forward..anyway..it went cam to plug, then green wire from there to throttle, then throttle back to plug then gray wire in that set out to alternator sensor. When I...
  4. A

    5v ref issue

    Out of curiosity when I'm reading the code reader on any given sensor, I check the box for 5v1 and 5v2 and then the specific sensor....the reading displayed should be: 5v1 5v or near that amt 5v2 5v or near that amt Sensor should be what? We disagree on the readout for this line item...I say...
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    5v ref issue

    We are tracking all those sensors Camshaft Crankshaft Fuel pressure Oil pressure MAF MAP AC High pressure Accelerate pedal
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    5v ref issue

    Well that's the thing...we have a code reader, the sensors as we read each one says (ac high pressure) 5v 1 5.5, 5v 2 5.5 Sensor reading is around 0.231 or 0.265 The code that keeps coming up is p0641 and p0651
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    5v ref issue

    I have 07 tahoe, it's giving a 5v ref. Backstory: engine oil pressure light kept coming on, replaces oil press sensor, it began making a knocking noise, I replaced engine w crate motor. At times when I would crank it, the starter would spin...turn it off then bake on and it cranks. After engine...

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