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Random Miss at idle and constantly feels like it’s detuning going down the road. 01 24v 6 speed


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Oh no tuner. May have been one previously. It has some kind of old BD monitoring system. The fuel pressure sending unit has 3 wires. One actually is tapped into the map sensor. Don’t understand that one. Need to look again to make sure I’m not crazy 

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Woild this be the what you have?

151-1085200.pdf

From a quick read it would appear that the MAP is tapped for the 5v reference signal to the added sensor. 

 

What kind of boost pressure do you normally see? I ask because without a tuner or boost fooler once you pass 20 psi the ECM will defuel the engine and set a code, 234.

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