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Discussion Starter #1
has anyone ever had performance problems on a stock stang and found it to be a ecm wire or coil? i'm loosing power but the engine runs great but you can feel it in the pedal.all the sensors are pretty new and it's a speed density car, it seems like one minute its ok, the nex i have no response..no coolant loss or in the oil...i'm baffled.
 

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Could be alot of things. Check the vacuum line to the MAP. Make sure it isn't leaking.
 

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Discussion Starter #3
really??

could the map itself be dead? i've checked for a leak with gauge and see no leak.my ecm wont do koer test for some reason, maybe cause f/p is disconnected and hooked to switch?(88 lincoln lsc 5.0 ho engine, wiring d9s speed density ecm)
 
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