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Car running lean


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Had engine management light come on and garage identified car running extremely lean.Turns out this is due to air being drawn in  a small metal tube on the left hand side of the  Motordyne plenum cover.Garage dont know if this should have a tube fitted to it or it should be blanked off as blanking it off returns fuel levels perfectly,anyone any clues?cheers

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I had a vac leak post throttle body and it made my engine run rich as the ECU was trying to save the engine. Leak was from a catch can hose plumbed to the port near the one you mentioned. Mpg on a run went down 12 which was alarming.

 

 

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8 hours ago, davey_83 said:

I had a vac leak post throttle body and it made my engine run rich as the ECU was trying to save the engine. Leak was from a catch can hose plumbed to the port near the one you mentioned. Mpg on a run went down 12 which was alarming.

 

 

Alarming to say the least :blink:

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