Check engine MAP Code - Rough Idle

[minoux]

The code on the check engine light are MAP. The MAP sensor was changed twice.
The symptoms are:
Low gas mileage
Loss of power
Rough idle
High gas use at idle
Can’t hold speed
Slow throttle response
Has anyone experienced this?

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[minoux]

Add the following has also been changed:


MAP, Air Temp Sensor, PCM valve


Throttle body, aux battery, main battery one year old,

 

[JohnnyG]

Your symptoms would indicate an actual intake manifold leak & a large one. Could be an intake manifold gasket or anything connected to the intake manifold. Was the intake removed, say for a spark plug change? Could also be PCV related. You may or may not hear a hissing sound depending on where the leak could be. I would check the actual intake manifold pressure, should be 18 inches vacuum or more at idle. There should be a way to check the MAP sensor, see service manual. I'm assuming you have the 3.6, you should always specify.

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