Q: Laboured idling and backfires

Automatic transmissions have been called “slush boxes” for years by old drag racers. The main reason for this name is they are a fluid driven device. Because of this, fluid level and condition are crucial to proper operation. Unfortunately, the...

You should use SAE 5W-20 engine oil.

I would have the battery load tested (https://www.yourmechanic.com/services/battery-is-dead-inspection) to see if it is in fact dead. That may cause all the problems you're having.

Unfortunately, this is an issue that will require the transmission ECU to be diagnosed using a scanning too specific to this in order to determine what the cause or issue is. This is a common issue on the BMW transmission...

When the Check Engine Light is illuminated and you’re able to download the P0601 OBD-II error code (https://www.yourmechanic.com/article/-p0601-obd-ii-trouble-code-internal-control-module-memory-check-sum-error-by-spencer-clayton), it typically indicates that the internal control module within the ECU is either faulty or not receiving correct data from the transmission,...

Hi there. Since you completed so many different repairs, it unfortunately opens the door to multiple possible issues that might be the source of your hard to start issue. The first thing I would do is knock off the easy...

With the running description you gave you should not drive it long distance if you are getting engine noise and check engine light flashing. The problem may be low oil pressure or another issue with a sensor. Have the vehicle...

Hi Darryl. Thanks for contacting us today. Generally speaking, a single cylinder misfire will gradually create a steady vibration, but not stop when you're accelerating. The type of vibration you're describing is often caused by a transmission or engine mount,...

If the leak is at the radiator fittings for the transmission cooling lines, the tube end may have debris or may be misshapen. There is an o-ring in the female quick connect fitting on the radiator and you want to...