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91 Bronco Check Engine/Transmission
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tmorris454
New User
Oct 2, 2007, 9:13 AM
Post #1 of 2
(1586 views)
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91 Bronco Check Engine/Transmission
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I have just purchased a 91 Bronco w/351 Windsor 4x4. Just lately the Check Endine light has came on shortly following with felling a significant bump when the Automatic transmission shifts from 1st to 2nd gear. Any suggestions?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 2, 2007, 9:36 AM
Post #2 of 2
(1582 views)
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Re: 91 Bronco Check Engine/Transmission
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91? Check for a fairly large vacuum leak. Manifold vacuum has to do with upshifting (if that was delayed it would be rough and the leak if substantial would trigger a CEL. Might be that simple,
T
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