On the 3.9L V6, 5.2L V8 and 5.9L V8 the Oil leaks commonly from the valve cover gaskets, intake manifold gaskets (front and rear), timing cover gaskets, distributor O-ring, and the rear main seal area. Using fluorescent engine oil dye can be helpful in determining the source(s) of the oil leak.
The instrument cluster may work erratically at times. Our technicians tell us that the fault is commonly due to connection issues at the cluster electrical connector. There is a kit available to repair the connector and terminals.
Some vehicles may exhibit one or more of the following: Spark knock complaints when the vehicle is under load, various single cylinder misfire, and surge in 4th gear (around 45 mph). Our technicians tell us that rerouting the coil and spark plug wires to minimize induction effects will commonly correct this condition. If wires must cross during the reroute procedure, they must cross at a 90 degree angle.
Some vehicles may exhibit a "buzz", whining", or "moaning" like noise from the transmission when reverse gear is selected. The condition is caused by a resonance of the transmission regulator valve system. Our technicians tell us that the repair involves replacing the transmission regulator (aluminum) valve with a steel one.
A no crank condition may be cause by a blown starter relay fuse. If the fuse is blown and the relay circuit is not shorted to ground, our technicians tell us there is a relay and harness assembly to be installed along with a new fuse.
The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops. There is also a revised vacuum check valve available to address this concern.
A knocking noise front the front suspension may be caused by interference between the idler arm and the stabilizer bar. Our technicians tell us that if this is the case a revised stabilizer bar is available.
Insufficient fuel pressure may be caused by particulate contaminates or other type of substances by-passing the primary fuel pick-up screen and resulting in fuel pump failure. Our technicians recommended to replace entire fuel pump module assembly as two (2) filters, primary and secondary are included with the assembly.