The loosened timing chain will rattle like mad and damage plastic timing chain guides. In this case, the domino effect is more than likely. If you can hear rattles, the timing chain may have become loose due to the blown out tensioner. So, listen carefully for any unusual rattles after a cold start. Timing chain rattles are most noticeable at the very start. Having all these parts working correctly is crucial as all of them affect moving parts of the engine and, more or less, keep the engine from tearing itself apart. VVT hasn’t been installed in older 2 valve motors. Bear in mind that cam phasers are part of the Variable Valve Timing system which is an important component of the 5.4 Triton engine with 3 valves per cylinder. While causes for such sounds can be numerous, owner experiences have shown that the most likely reasons can be blown out tensioners, a loose timing chain, and cam phaser breakage. The engine sounds strange? You can hear a lot of knocking noises on acceleration, cold startup, or when you let off the throttle. Timing Chain, Tensioners, and the Variable Valve Timing Problems
Ford focus fuel pump driver module problems driver#
![ford focus fuel pump driver module problems ford focus fuel pump driver module problems](https://mechanicbase.com/wp-content/uploads/2021/07/abs-control-module-car-e1633971016776.jpg)
This problem is typical for the Ford F-150 with a 5.4 Triton engine. 5.4 Triton Engine Failure of the Fuel Pump Driver Module