have a problem with the maf sensor.. i was not getting power to the burn off on the maf ...so i replaced the burn off relay still no power.. when i pull off the burn off relay i get 14.1 volts with engine running .when i use 2 jumper wires to the relay i lose (blk 900 d12 burn off control )if i take that jumper to the battery neg terminal the relay closes and sends power to the maf .... does that sound like a bad ecm ?
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i just checked the black 900 d12 wire from the relay to the ecm and i have continunity...and checked according to my wiring schmetic d6 tan wire and d3 blk/wht wire look to be my only grounds to ecm and they have continunity to ground ..its just when i put a load on my blk 900 and 12v i lose my blk 900 ground ...does the maf sensor it self send any signal that controls that blk 900 wire to the ecm or does the ecm or prom itself control that ground wire?
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also car runs like crap when the maf is plugged in ...runs good when disconnected....and 1 other thing my ignition coil went bad small crack along the tower which shot a spark from under the boot and was arching to itself ..just wondering would that of sent voltage through a ground and to the ecm?

 

Try this: key-off, engine-off, at the ECM ground pin D12 (blk 900) to the ECM case. If the wiring and relays are good the MAF will come alive and will do a burn-off. The wire inside the MAF will glow orange.

The burn-off will have +12V applied to both pins D & E on the MAF sensor. Pin E being power, and pin D being the burn-off signal. Both the MAF burn-off and MAF power relay is involved in the burn-off cycle.

To check the ECM, key-on and start the engine. At key-off the ECM should pull pin D12 low (to ground) to activate the burn-off relay. If it doesn't then the ECM is bad.

RBob.