Expert: Grip Singh - 3/21/2007

Question
Have an X OPP car that has been stalling out while in motion.  I am thinking it may be a misfire with the spark plugs or has a possible need for a tune-up.  Does it sound like I may be on the mark or am I off my rocker :)

Answer
Its hard to say. Could be a fuel or spark issue. Change the plugs and the fuel filter. If it continues, attach a fuel pressure guage to the car while its driving and see if the psi drops off as the car gets warmer. This might indicate a tired fuel pump that needs to be replaced. Misifires are usually audible.