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92 740T wagon 3800rpm cutout 700 1992

posted by  higgybob on  Mon May 13 21:39 CST 2013
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last visit: Mon May 13 22:04 CST 2013
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under hard acceleration, engine revs fine until rpm hits 3800 and then slams down like it hit a governor or some thing... I did read somewhere about a possible bent rpm sensor plate possibly being bent while changing a timing belt. (this was done recently) Where is this plate found? could this be possible?
Thanks for any help








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    92 740T wagon 3800rpm cutout 700 1992

    posted by  higgybob on  Mon May 13 22:11 CST 2013
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    last visit: Mon May 13 22:04 CST 2013
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    hoses seem ok , but i'll pull the one to turbo tomorrow, the other post mentioned if someone used a screw driver on the fly wheel, to hold(jam it while changing the timing belt. might be possible, i'll check with the mech who did the job, thanks for thoughts








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    92 740T wagon 3800rpm cutout 700 1992

    posted by  aleekat on  Mon May 13 21:55 CST 2013
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    last visit: Fri Oct 24 13:19 CST 2014
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    Do you have an "idiot" boost gauge or "psi" gauge? You may be hitting the limiter/psi setting. If not, I would be looking at all boost hoses for splits/cracks. It may also be soft and collapsing. If you are referring to the "rpm" sensor, it's on the bell housing. Not anywhere near the timing belt.
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