power gone

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Jun 20, 2004 | 08:19 PM

19884x4150

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power gone

my buddy has a 1989 4x2 with 3 inch duals, when the truck is cold it moves great. But when it heats up its power goes away and it fells like you driving a go kart. He said that there is one o2 sensor in it, I dont know if those trucks came with 2 sensors. I dont know why it fells so powerless please help, daily driver.

Jun 21, 2004 | 03:55 PM

duke-bearnie

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If the engine has a knock sensor, it should be checked. If it is ill, it can tell the engine computer there is a knock when there is none. The computer will retard the ignition, and power will go away.

Jun 22, 2004 | 11:00 AM

lmadore

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Joined: Jun 2004

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From: Mid-Missouri

3" exhaust is a lot for a 302. Smaller exhaust (2.25 duals) would do a better job of scavaging the exhaust charge away from the combustion chamber. Your exhaust is running too cool.

Too big of an exhaust will cause you to lose torque.