88 Chevrolet C30 5.7L MAP sensor

[92_Lumina_Z34]

Truck ran fine and while driving the engine light came on. I checked it with a scanner and it said code MAF/MAP sensor too high. The truck would stall without giving it throttle. It only runs rough at idle. So I checked the hose and throttle body gaskets and everything seemed to check out. Put in new sensor and it stays running but hesitates. The light came back on and says code MAF/MAP sensor too low. No idea at the moment.

[MT-2500]

Originally Posted by 92_Lumina_Z34

Truck ran fine and while driving the engine light came on. I checked it with a scanner and it said code MAF/MAP sensor too high. The truck would stall without giving it throttle. It only runs rough at idle. So I checked the hose and throttle body gaskets and everything seemed to check out. Put in new sensor and it stays running but hesitates. The light came back on and says code MAF/MAP sensor too low. No idea at the moment.

Could be wiring or plugin or vacum to it.

Chek engine vacumn and vacumn to sensor.
If good check sensor reading in PCM.or voltage reading at sensor.