Q: Idling issue

Your car’s catalytic converter (or converters, as the case may be) is a critical component of your exhaust and emissions systems. It’s responsible for burning off harmful gases that lead to environmental damage and smog production. If your converter is...

GM has a TSB out concerning clogged injectors (https://www.yourmechanic.com/article/what-causes-fuel-injectors-to-get-clogged-or-dirty) that may cause all of the rough running/no start symptoms that you are experiencing. A professional fuel injector cleaning may help correct these various engine running issues. The procedure does require...

Hello. For a sudden drop like this to occur, it usually means that a sensor it not reading correctly. I usually install a scan tool first to check things like the oxygen sensors (https://www.yourmechanic.com/services/oxygen-sensor-replacement) and the air flow meter as...

Hello. Most of the time this occurs when the actuator in the transfer case fails. If the actuator was not when you went through the puddle then that could cause it to fail from the sudden change of temperature. This...

Engine misfires can be caused by a list of problems, but there are a few suspects that occur more than others. The primary culprits are simple – spark or fuel – usually manifesting in spark plugs, plug wires, the coil(s)...

Hi there: There are several issues that could be causing your Journey to overheat. If the thermostat does not open when it should, it could cause the engine to overheat. Also if the radiator fan does not turn on when...

Hi there: Most of the time, when the coolant overflow reservoir freezes up due to water being put inside, it can cause cracking; since they are typically made of plastic. The best thing to do is to remove the bottom...

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, What you are describing sounds like an ignition coil pack that may be failing. Ignition coils are prone to this type of erratic functioning or heat cycling when they are beginning to fail due to the temperature fluctuations...