I have a 2007 Ford Expedition Limited EL 4x4 with the 5.4 Engine. It has 182k miles. For the past 3 months it has started popping on acceleration over 50mph. At first I could kick down the OD button and it would stop, now its doing it most all the time once I get up to 50mph or over. Especially under acceleration or pull.
If I let off the gas it stops in about a second. It sounds like sparking n popping almost like popcorn is going off in the engine. Like a crackle. From research it looks like Spark Knock, or Detonation. Either of these are concerning as I do not want to ruin the engine.
I personally replaced all the Spark Plugs n Coils about 1.5- 2 years ago, but already it has burnt out the #2 and # 5 spark plugs the past 2 weeks. I just tried cleaning the MAF really well, and took the vehicle out today but, same issue. I run Seafoam it the gas tank once every other month.
Here are my thoughts, what do you think?
The engine is as smooth and quiet as it was at 50k miles when idling. Once it gets up to speed it is loud crackle n pop.
Any thoughts from anyone who has had this problem? What could it be? What was the fix?
Thanks for the help.
If I let off the gas it stops in about a second. It sounds like sparking n popping almost like popcorn is going off in the engine. Like a crackle. From research it looks like Spark Knock, or Detonation. Either of these are concerning as I do not want to ruin the engine.
I personally replaced all the Spark Plugs n Coils about 1.5- 2 years ago, but already it has burnt out the #2 and # 5 spark plugs the past 2 weeks. I just tried cleaning the MAF really well, and took the vehicle out today but, same issue. I run Seafoam it the gas tank once every other month.
Here are my thoughts, what do you think?
- Should I try to get the Carbon cleaned and run some SeaFoam direct instead of the Gas tank?
- Could it be that the spark plugs are worn out again( would this cause such a bad crackle? Had lots of Fords with worn out spark plugs but never had this problem. I know 5.4 is notorious for spark plug replacement)
- Should I buy another MAF sensor thinking maybe this one is bad? Its got 182k on it?
The engine is as smooth and quiet as it was at 50k miles when idling. Once it gets up to speed it is loud crackle n pop.
Any thoughts from anyone who has had this problem? What could it be? What was the fix?
Thanks for the help.