Code 33, MAP voltage high/vac low
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Supreme Member
Joined: Aug 2001
Posts: 1,041
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From: Troy, MI, USA
Code 33, MAP voltage high/vac low
OK, so simple question here. Is there any test I can run on the MAP sensor to determine whether I should replace or look for vacuum leaks? Or should I just hook a vacuum gauge (which I dont have) up?
Senior Member
Joined: Dec 2001
Posts: 731
Likes: 2
From: Blacksburg, VA
Car: '92 Rally Sport
Engine: LO3
Transmission: 700R4
As long as it's reading between 1 and 1.5 volts at idle and close to 5 volts at WOT then your MAP sensor is okay. You do not need a vaccum guage as long as there are no vaccum leaks between the throttle body and the map sensor or something else isn't wrong.
Later,
Harry
Later,
Harry
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