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454 engine backfiring

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Re: 454 engine backfiring by Mark L
Post New Message 1993 Motorhome with 454 injected

The engine backfires a bit when it is cold then runs fine for long enough for you to get on the freeway and out of town to that first long grade.... at that point it starts to backfire up the hill. when the road levels out so will the engine. I have read the earlier postings and no one seems to come back a tell us/me what really worked...

I replaced the coil and it got 100 times worse.

Help Mark
All Messages in ThreadAuthorDate
Post New Message454 engine backfiring Adam 4-4-03  
  Reply to MessageRe: 454 engine backfiring Adam 5-1-03  
  Reply to MessageRe: 454 engine backfiring Mark L 9-14-09  
  Reply to MessageRe: 454 engine continues to run and backfires w/ignition off C. L.ee 3-22-05  
  Reply to MessageRe: 454 engine backfiring Dave F 4-5-03  
  Reply to MessageRe: 454 engine backfiring R. Souders 5-1-05  
  Reply to Message454 engine backfiring Gary 1-12-08  
    Reply to MessageRe: 454 engine backfiring wanda bryant 4-5-03  
      Reply to MessageRe: 454 engine backfiring Joe 4-6-03  
        Reply to MessageRe: 454 engine backfiring tunde ewulo 6-26-03  
        Reply to MessageRe: 454 engine backfiring bill h 4-10-03  
          Reply to MessageRe: 454 engine backfiring John Ogletree 4-26-03  
            Reply to MessageRe: 454 engine backfiring Ed Lavoie 6-28-03  
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