Car Problem Reports

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The engine temperature sensor wire for the engine temperature gauge, or warning light, may touch the rear exhaust manifold causing a short to ground causing erratic operation of the temperature gauge or warning light.

A squeak or groan noise may be noted from the front or rear suspension. Spraying a light lubricant on the suspension bushings 1-2 times per year may help eliminate the problem.

A broken right engine mount bracket may cause a grinding, clicking, or knocking sound—or a vibration coming from the front end of the vehicle.

The EGR orifices in the intake manifold may plug with sludge. If the truck has high mileage, this may cause engine misfire when first accelerating because too much EGR gas is directed into the cylinders of the unplugged orifices. This makes the mixture lean, which causes a gradual stumble that increases in severity until repaired.

The upper engine mount (upper torque mount) wears out prematurely. There are aftermarket mounts available that don't wear out, but they tend to cause excessive engine vibration to be transmitted through the vehicle
The upper engine mount (upper torque mount) wears out prematurely. There are aftermarket mounts available that don't wear out, but they tend to cause excessive engine vibration to be transmitted through the vehicle.

4.0L 6 Cylinder
Due to misfires, you may experience a loss of power when accelerating between 50 and 70 MPH (most noticeable below 32° F). This is commonly caused by carbon buildup on the valve stems, as a result the exhaust valves may close too late. All of the exhaust valves should be inspected and if necessary the engine should be decarbonized.

4.0L 6 Cylinder
Due to misfires, you may experience a loss of power when accelerating between 50 and 70 MPH (most noticeable below 32° F). This is commonly caused by carbon buildup on the valve stems, as a result the exhaust valves may close too late. All of the exhaust valves should be inspected and if necessary the engine should be decarbonized.

If a shudder is felt while turning the vehicle at low speeds, replacing the power steering hoses with revised hoses may be necessary. Also consider installing a finned power steering cooler.

The front brake pads may wear faster than normal. The 4x4 hubs will need to be removed on 4WD models to service the front rotors.

The tachometer sensor may fail; if the tachometer needle jumps around and the transmission has harsh shifts or does not upshift, this sensor should be checked. This sensor is mounted in a cover at the front of the motor.

A faulty relay can cause the air pump to overheat and set a check engine light. Replacing the relay will fix this issue.
The supercharger may develop a noise in the front section of the supercharger assembly. The is due to a worn coupler. Our technicians tell us that a remanufactured coupler section is available from aftermarket suppliers.
Axle lubrication should be performed at each service; the hydraulic fluid in the differential lockers should be changed every two years.
Axle lubrication should be performed at each service; the hydraulic fluid in the differential lockers should be changed every two years.
Axle lubrication should be performed at each service; the hydraulic fluid in the differential lockers should be changed every two years.
In some vehicles, the automatic transmission over heat light may come on with sustained highway driving or driving at a sustained speed. Our technicians tell us that flushing the transmission and changing from Dextron lll to Dextron ll can help remedy this problem.
Some models have an issue where a faulty thermostat does not allow the engine to reach normal operating temperature and because of that the computer will not allow the torque converter to operate in the lock-up mode. Replacing the thermostat will repair this issue.
The torque converter may not lock up because some models with the automatic transmission may have a faulty thermostat that will not allow the engine to reach normal operating temperature.
The clutch in the torque converter can fail allowing debris to circulate throughout automatic transmission.
The clutch in the torque converter can fail allowing debris to circulate throughout automatic transmission.
The clutch in the torque converter can fail, allowing debris to circulate throughout the automatic transmission.
The timing chain tensioner may bleed off oil pressure after the engine is shut down. This can cause a rattling noise when the engine is started cold and a revised timing chain tensioner and guide are available to correct this issue.

Failure of brake components can be caused by contaminated brake fluid. To help prevent this the Brake fluid should be flushed at the very least every 60,000 miles.

One the 3.9L V6 and 5.9L V8 the carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms may vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.

On the 3.9L V6 and 5.2L V8, an intermittent connection in the crank position sensor wire connector can cause poor engine performance or the engine may crank but not start.

Our technicians tell us that it is important to change the coolant with factory coolant and replace the thermostat every 60,000 miles. This will help to protect the head gasket, otherwise the head gasket can deteriorate and be stressed to the point of failure.

Our technicians tell us that it is important to change the coolant with factory coolant and replace the thermostat every 60,000 miles. The will help protect the head gasket, otherwise the head gasket can deteriorate and be stressed to the point of failure.

Oil in the distributor can cause an engine misfire. Replacing the distributor will stop the oil leak.
The upper windshield molding can vibrate at higher speeds causing a noise. Back filling the molding with a silicone sealer is involved in the repair.