jonijja

2007 Mustang GT 4.6, codes showed p0340 and p0344 codes. Car has a Predator Diablo custom tune, CNL cold air intake. I have replaced cam shaft position sensors, code continued. Replaced alternator, code continued. Replaced crank shaft position sensor, code continued. Car hesitates, and surges. Need advice/help. Would appreciate if anyone has any ideas!

hollywub

I would check the wiring from end to end if you haven't already. Inspect the plugs going into the sensors. You wouldn't believe how many times that is the problem.

You have changed every hard component.

jonijja

what do you mean by hard components?

J2L06GT

Have your alternator tested, this is a common problem when
they start to go bad, there is a TSB on it.

hollywub

Sorry. I just meant parts... Did you ever figure this out?

aa4shaw

To All on this message board who have a 2005-2008 Mustang. I am currently sitting at the dealer having my alternator replaced after receiving the dreaded P0340 P0344 error codes. But while sitting here I also found that my lower engine cover was missing! Apparently the Dealer and other oil change places have a bad habit of removing this cover in order to get to the oil filter, and they either inadvertently forget to put it back or they intentionally forget to put it back because its a pain in the butt. That being said, I implore all of you to make sure you have your lower splash shield in place, otherwise you will continue to have your alternator fail due to dirt and water getting in it. If your engine compartment is showing signs of splash back or mud, you have probably had the lower engine cover removed by a lazy mechanic. See link below http://www.partsgeek.com/mparts/skid_plate/ford.html