First would like to thank those who helped me in my truck purchase, a 2004 F350 Crew dually 4x4. I love it! I brought it in at 99980 miles for its last warranty checkup and they found some problems and fixed them. My problem now is it surges when I let off the gas. I found that my Air regulator guage ( the clear plastic one on the air filter is cracked. I suspect it was damaged at servicing but can't prove it. Would that cause it to surge? The dealer says I must purchase the whole assembly at over $250. Does anyone know where I could find just that part? Thanks in advance. Mack [email protected]