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TSB
99-18-8
  • INDUCTION BACKFIRE - ON ACCELERATION - ALL AMBIENT TEMPERATURES - VEHICLES WITH 4.2L ENGINE - CANADIAN VEHICLES ONLY
Publication Date: AUGUST 26, 1999

FORD:
1997-1999 F-150

This TSB article is being republished in its entirety to include 1998 and 1999 model year vehicles.

ISSUE:

Some vehicles may backfire on acceleration. This may occur at all ambient temperatures and may be caused by excessive Intake Valve Deposit (IVD). This may be due to carbon deposits on the intake valves.

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