pre-detonation
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New User
Joined: Jan 2005
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pre-detonation
I Have A 82 Ford Bronco And Everytime I Have The Vechicle In Drive And Step On The Gas It Stalls Or Make A Knocking Noise. What Can Cause This Problem. Also At Low R.p.m It Idels Rough.
Postmaster
Joined: Jan 2004
Posts: 4,758
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From: colorado
pre detonation or knocking (dieseling) is caused by the air fuel mixture spontaneously combusting before the spark plug ingnites it (like a diesel engine) tow major things can cause this 1) to much advance on the ingintion timing and 2) running too low of octane fuel
Logistics Pro
Joined: Apr 2004
Posts: 4,292
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From: NJ where fun comes to die
It could be a lot of things, fuel delivery, in need of a tune up, vacuum leaks etc. You might also try posting in the Bronco forum. The Bronco gurus are very experienced. What engine do you have, and what has been done to it as far as mods, and what repairs you have done lately? Did you just get it?
