Q&A

2006 Ford F-150

Question: engine misses

Question

SRH, 5.4L V8, Port Angeles, WA, October 29, 2010, 06:49

 Rookie

When my truck is cold in the morning when I step on it, the engine misses, lurches pops and bangs as it accelerates. When the truck is warmer this is less noticable, but sometimes still happens.

Also, this has been an ongoing issue that ford told me was normal, but I dont see how it could be. When traveling at 25-35 mph and you step on it, nothing happens for quite a while, then the engine begins to accelerate, but does seems to hesitate before downshifting and accelerating. This has been going on from day one, and it independent of the other problem I am having.

2 Answers

Answer It

Flag This

Follow this Question Unfollow this Question

• Answer #1

  patrick mannion from Greg Solow's Engine Room, October 29, 2010, 09:17
  

   Master

  Popping and spitting is a lean condition. I would start first by attaching a scan tool and look at air flow reading or MAP voltage to see if they are normal, look at fuel trim LONG and SHORT term, look at coolant temperature switch readings and see if the computer is calculating fuel needed based on accurate data. Look for vacuum leaks, and verify fuel pressure.
  Reply
  Flag This
  Like0
• Answer #2

  DaveJHM October 29, 2010, 23:36
  

   Master

  Great advice from Patrick -- and to add to it, make sure there are no exhaust leaks.
  Reply
  Flag This
  Like0

• engine runs rough/missing
  when accelerating the engine misses really bad. If I back off the gas pedal it seems to smooth out some. It does not do...

  Q&A > Ford > 2005 Ford F-150

• engine miss
  engine has a slight miss.it is not constant. it idles perfect. seems like slight electrical miss while driving. i have changed plugs ,wires,cap and rotor and coil. what else can i do

  Q&A > Ford > 1994 Ford F-150

• Engine miss when running
  Truck has a miss when running hot down the highway

  Q&A > Ford > 1998 Ford F-150

• Truck has a miss only when warm
  My truck just recently started missing but only when warmed up.Runs fine until it reaches operating temp. Check Engine light is not on and has never been on!Drove it to work one day and was fine in...

  Q&A > Ford > 2001 Ford F-150

• Ignition Coil Failure Due to Excessive Spark Plug Gap
  An illuminated Check Engine Light could indicate that one or more of the ignition coils has failed due to excessive spark plug gap. To fix this problem, the ignition coils that have failed, the spa...

  Common Problems > Ford F-150