Quote Originally Posted by JMBD2112 View Post
Had a P0411 incorrect air flow, all of the vacuum lines on top of the motor were broken. Got the kit per TSB 0102-04 and replaced all the vacuum lines. Cleared DTCS and no codes have came back. I've been driving it and watching the fuel pressure when it cuts out, it doesn't change. I'm running at 36psi at idle and it hits 43 psi under load, pulled the vacuum line off the regulator and my pressure jumps up to 45 psi which tells me my regulator is working, if the inertia switch was bad, wouldn't my FP drop out?
When it does idle does it run rough? Have you smoke tested the intake?