Q: Which fuel should I use, 91 or 95?

A P0442 fault (https://www.yourmechanic.com/article/p0442-obd-ii-trouble-code-evaporative-emission-control-system-leak-detected-small-leak-by-spencer-clayton) indicates a leak in the evaporative emissions system, or EVAP system for short. You are already on the correct path by checking the gas cap first. This is the most common reason for this fault, though...

With the key in the On position you need to test it to see if you have power on one side of the coil (red wire). When you crank the engine, do you still have power? If you do not...

You need to look at the oil pressure sending unit just above the oil filter to see if it got damaged when changing the oil filter. If it is the sending unit, then replace it since the fuel pressure will...

Hello there, thank you for asking about your 1986 BMW 635CSi. According to the spark plug cross reference website, the A6GC is a direct replacement for the A6G. You should have no problems using that plug. If you want to...

Hello. Check intake vacuum at idle to "guess" as to the status of the timing. If below factory spec., for example if as low as 15 inches or so (vac. gauge reading), you might be off a tooth. Really, the...

Hello. There are several ways that you can accomplish painting just one panel. It really depends on your level of experience and how you feel most comfortable performing the task. You can start by removing the entire panel if you...

It sounds like you may have a clogged catalytic converter that is not allowing the vehicle exhaust to breathe correctly. The catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere....

Hi there. Vehicles like yours have had the same issue with the brake master cylinder leaking brake fluid into the brake booster causing the fluid level to be low. This was turning on the Slip Indicator Light. Check your brake...

The short runner valve actuator that you replaced is just the electric motor that moves the short runner valve to its correct position. However, the problem is likely that the valve itself within the intake is sticking. Using an appropriate...