Shuddering and backfires on deceleration......
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Elder User
Joined: Nov 2001
Posts: 892
Likes: 1
From: Duluth, MN
Shuddering and backfires on deceleration......
If it ain't broke.....change stuff till it is!
I have an 86' f-150 4x4, and when i decelerate i get a muffled back fire out the exhasut pipes and a shuddering engine. I just rimoved and cleaned the throttle body, and it idles and accelerates fine. it's only upon deceleration thatit shudders and backfires. could this be a plugged catalytic convertor?
I have an 86' f-150 4x4, and when i decelerate i get a muffled back fire out the exhasut pipes and a shuddering engine. I just rimoved and cleaned the throttle body, and it idles and accelerates fine. it's only upon deceleration thatit shudders and backfires. could this be a plugged catalytic convertor?
Senior User
Joined: Nov 2000
Posts: 379
Likes: 2
From: Azle, TX
Shuddering and backfires on deceleration......
I believe so, mine does the same thing and I know my cats are bad, but it is a pain in the butt to replace them and I can't find anyone that carries the exact first cat.
