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Thread: map sensor question

  1. #1
    LSS Regular Regular Member
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    map sensor question

    i got a little 308? i think,302 bored .040 over, with trick flow heads and stage 2 cam blah blah blah, i don't have a map sensor at the moment, is it necesary to have one?

  2. #2
    fox-man Regular Member sticks905.0's Avatar
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    i im sure its a no brainer the map sensor has to read the vacume. so with your set up im almost positive you need. "dont quote me" someone else will chim in im sure

  3. #3
    LoneStarStangs Addict Regular Member Sonic Blue 85's Avatar
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    Is your car a speed density car or MAF car? If it is a speed density car you will need a MAP sensor and hooked up and it will run like shit with that cam without a tune. If you have MAF, the part that is called a MAP on a speed density car is called a barometric pressure sensor, it is the same part, just does not have a vacuum hose hooked to it, the port is left open, but it does need to be plugged into the computer harness. It tells the computer what the air density is, a MAP does the same thing right before the car starts, then registers manifold vacuum. If you leave either a MAP or a Baro sensor disconnected, the car will run very rich.
    The current combo is an '85 coupe with 302 bored and stroked to 364, Ported Twisted Wedge heads and a BXR intake, A9M ECM with a Moates chip, Doug Nash 5 spd, 4.56 gears, Hoosier 275/60/15 drag radials.
    Daily driver '89 GT 302 stock block, crank, rods and pistons, ported GT-40P heads with stock valves, Ported Explorer intake, B302 cam, Z spec T5, 3.73 gears, Moates chip and no traction. Made 325 whp and 325 wtq.

  4. #4
    fox-man Regular Member sticks905.0's Avatar
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    and there you go!!!! good stuff sonic

  5. #5
    LSS Regular Regular Member
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    My car was a 4 cylinder. the harness came out of a 91 gt. Hopefully I can get this thing to ya soon Ron! Thanks again!

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