Q: Spark plug closest to firewall /on 4.0 grand cherokee has oil on it

When the swirl valve fails, a few things are happening. First, the exhaust gas recirculation valve (EGR) and its passages get clogged, leading to a seal in the positive crankcase ventilation (PCV) system leaking oil into the swirl valve. The...

Whether or not you can attach a camper to your vehicle depends on your specific vehicle. Luckily, check inside the glove box for a large label. This is the ‘Loading Information’ label that will tell you if a slide-in camper...

If your engine is going to have to be replaced due to using too much oil, then you may choose to try and use thicker oil (https://www.yourmechanic.com/article/why-does-motor-oil-viscosity-matter). I would not recommend it, but it is your choice. You could go...

The engine computer will need to be tested (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) to see the codes received. There is a problem in the system that is causing the computer to go into failure mode and limit the throttle opening. Considering the fact that...

Hello. Engine stalling can be caused by a wide variety of issues. Faults within the fuel, ignition, or engine management systems can all cause the vehicle to experience stalling. A few common causes of stalling are a bad idle air...

Hello. For the majority of vehicles, the timing belt (https://www.yourmechanic.com/article/how-long-does-a-timing-belt-last) should be changed every 100,000 miles or 160,000 kilometers. If you need help with this service, a qualified professional from YourMechanic can perform a timing belt replacement (https://www.yourmechanic.com/services/timing-belt-replacement) at your...

You need a mechanic to come and check the vehicle to see if the fuel system is leaking onto or into the engine causing the problem. The loud explosion sound may be backfiring and will need to be checked to...

Hello. From what you describe it would appear that your vehicle is experiencing some serious performance and maybe even mechanical issues. If you believe the noise is coming from your turbo area it may be possible that the turbo is...

As you know, code P2076 indicates that the signal for the tuning valve position sensor was not within a specified range. When this happens, often times it is related to a power or voltage supply issue, an open circuit or...