I wish some of you could have been there today to explain this to Ford's service people because they looked at me like I was crazy.

I am going to go to an indepent shop tomorrow to explain the entire issue once more (which only seems to be getting worse) and ask them to visibly check each spark plug because this all may have resulted from my getting them changed. Although that doesn't make sense either.

This is the Flowmaster I have: exactly what I should have bought because it's model specific.
I thought Ford was insane today to tell me that I had to go back to stock exhaust to fix this problem.

http://store.summitracing.com/partde...p;autoview=sku

 

if you have that with one single 2.5" exhuast there is no way it is due to no backpreasure, in fact with a chokemaster, you probably have as much back preasure as stock, i have dual 2.5 on mine with LTs and it did nothing but help

try
-fuel filter
-TPS sensor
-plugs gaped wrong/new plugs/wires

 

Got it fixed. Crack in one of the spark plugs and all is back to normal. Power and sound are back, and acceleration is back to normal.

 

Thank you for letting us know. Interesting. If I get trouble again I'll be changing my spark plugs.

 

bobs184: Is your problem still fixed now you've swapped your spark plugs?

Mine's started to do it again, its like its going into overdrive far too soon at ~30-40mph. Only when car warmed up.