I would start by checking for trouble codes. If the ignition system is acting up (likely) it may have set a trouble code. There is an ignition module on the distributor if you have a 3.0 engine, and on the bulkhead if it is a 3.8. There is also a PIP sensor inside the distributor. If either of these is causing problems, it will cause the problem you describe. Usually a fuel problem is more gradual, although if the engine is starving for fuel, it will certainly sputter. Check fuel pressure under load. It should maintain at 42 PSI or higher while driving.
Wednesday, March 25th, 2009 AT 11:09 AM