Iowa Chapter Director
Join Date: Jul 2002
Location: Ames, Iowa
first of all, the injectors on the v6's are pretty loud. But if it's something else, it could be a lot of things. First thing I'd do is buy a few cans of Sea Foam. Run one through the oil and the other through the main vacuum hose on the upper manifold. Also, an easy thing to check is the rocker torque. Tear the engine down to the valve covers and torque the rockers on the base circle to 22ft/lbs. If that doesn't fix the problem is could be lifter tick or piston slap. But I'd lean more towards lifter tick.
1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner