88 5.0
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Joined: Mar 2007
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88 5.0
OK by no means am I stupid when it comes to vehicles but this one has me stumped. I have an 88 f150 5.0. I found water in the oil and in the passenger side tail pipe of the exhaust. My first reaction, blown head gasket, I bought the additive now I get no water in the oil or the exhaust. One would think probem solved, but at low rpm the vehicle is hesitant and dies without gas being applied, at hiway speeds or rpms above 1200 the vehicle runs great minus a slight knock down around the crank. If I take the vacuum off of the break booster (giving a vacuum leak) the vehicle runs better? NO hesitation, idle kicks up and it doesnt die. I cant run a long bed ext cab pickup without power breaks. What does this sound like? I disconected and rerouted all of the vacuum, made sure I had no leaks, changed the oil, I put an MSD coil, cap wires and rotor on, changed the spark plugs, timed it, and it also has a new ICM on the distributor. It acts like a compression problem at low RPM but when it gets going it runs great. ANY help would be appreciated.
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Joined: Oct 2006
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is your check engine light on? I had a buddy who had a problem with the EGR valve, where it was open more than it should be. The result was the intake air was exhaust pouring into the throttle body, even at low RPM's, which made it run rough. Forget or not if it would kill the motor.
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The egr valve is blocked off and disconnected, I have also removed the smog pump and cut out all of the emissions. I still have no clue why...............but it is acting like it has a compression loss but it has no leak and it go's away at high rpms.
