97 Ranger 4.0 Crack in upper intake?

Discussion in '4.0 Engine' started by Crazed, Jul 30, 2012.

  1. Crazed

    Crazed New Member

    So it seems like my truck has a massive vacuum leak. I found a bunch of hoses burnt or broken and replaced them, to no avail it still idles rough and shakes the truck at a stop. So I got the trusty carb and throttle body cleaner out and sprayed around and got a spike near the rear of the upper intake. Are they known to crack? Is there a line back there I can't see?

    Also, I think the motor has been swapped with a different year. It has thick intake runners with a spot for the throttle and cruise cable on the upper intake manifold itself. The local junkyard swore they pulled off a 97 explorer. The runners are thinner and no place for the throttle cable to mount. Any help would be greatly appreciated.

    EDIT:: Also sometimes when coming to a stop it idles very high, 25-3000 and gradually comes down back to the shaking and rattling around 700. It is a 5 speed manual.
    Last edited: Jul 30, 2012
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  3. Brinker88

    Brinker88 Black sheep o' the family

    I can almost garuntee you it's cracked.

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