Q: Truck's rpm fluctuates and shakes when idling, engline light on code reads: cylinder 8 misfire.

Hi. Your issue could very well be due to a faulty master cylinder (https://www.yourmechanic.com/services/brake-master-cylinder-replacement). A fault in those particular model master cylinders have been experienced by QX56 owners in which air will seep into the brake fluid through the master...

The boost pressure, and the intake charge temperature sensor in the turbo boost circuit are thought to be the most common origins of "limp mode" problems. The connectors on these 2 sensors become slightly corroded with time, miles and weather...

If it happens at every gas station and not just one, there is most likely a problem with your vehicle's vent / purge system for the fuel tank. When you fill up, the vapors inside the gas tank need to...

Hi There, Unfortunately, there is no way to tell exactly how far your car will make it with a torn CV joint boot. Depending on how long this has been torn and how much damage has already occurred, this may...

Hello - given your mileage, your front struts and strut bearing plates are most likely candidates for the suspension noises (https://www.yourmechanic.com/question/suspension-up-front-makes-a-ton-of-noise-creaks) you describe. Colder weather will make turning noises louder (or "creakier"). Having a helper "rock" each side of the...

Hi there - the P0400 (https://www.yourmechanic.com/article/p0400-obd-ii-trouble-code-exhaust-gas-recirculation-flow-malfunction-by-jay-safford) code you have suggests a problem with the Exhaust Gas Recirculation system of your car. Given your mileage, this malfunction could be a clogged EGR valve or tube, solenoid or leaking exhaust gas tube....

Hi there. Based on your input, it's likely that the source of your issue are the relay's (as indeed they do "click" when activated) but it's also possible that your issue is caused by a different ignition system component. Assuming...

This may be a result of a faulty oxygen sensor. As you may know the oxygen sensors (https://www.yourmechanic.com/services/oxygen-sensor-replacement) which are part of your emissions system read exhaust gases to determine whether or not the appropriate amount of oxygen is present...

Hi Nicole. Thanks for contacting us today. The question I would ask you is whether or not you were having the starting hesitation issue prior to having the vehicle serviced - or if it happened after. If it's been an...