4.9 acting funny
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Joined: Apr 2004
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From: Thunder Bay, ON
4.9 acting funny
I've got a 94 E-150 clubwagon. If you rev it up in park the engine revs up very responsivly, then when you let off the gas the engine drops below idle almost dying, and then back up to normal idle. When it almost dies the volt meter drops and comes back up. Also, when you put it into reverse to back in the driveway the engine almost dies again then catches up. When it catches up you can see a puff of black smoke. What is the deal with it. Can it be the catalytic converter?
P.S. this has only been happening since we had NAPA put a long block in.
P.S. this has only been happening since we had NAPA put a long block in.
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Joined: Jan 2004
Posts: 161
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From: The KeyStone State
Another common problem is the Throttle Body gasket gets sucked into the manifold inlet and causes a vacuum leak.
I'm not sure when,if ever, Ford upgraded to a more durable gasket though.
The replacement is thicker than OEM and runs like $2
IAC's run about $60
-J-R-
I'm not sure when,if ever, Ford upgraded to a more durable gasket though.
The replacement is thicker than OEM and runs like $2
IAC's run about $60
-J-R-
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From: Thunder Bay, ON
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