Q: Powertrain warning lamp

Hi there, there are several reasons as to why a car can overheat in traffic. Some of the things you mentioned are important context clues that may help rule some things out. The white smoke you mentioned NOT seeing is...

The misfire is caused by one or more of several possible causes: the coil, a spark plug, an injector, wiring, compression in the cylinder, or the computer for the engine. Any one of these could be the culprit and diagnosis...

The front differential has a purpose to propel the front wheels, in turn giving your Mercury its 4 wheel drive capability. If you are experiencing abnormal rotational sounds or a clunking or banging during acceleration or deceleration while the 4...

Hi there, thanks for your question. Yes, these older Chevys do have full time four-wheel drive. There are kits available that will disengage the differential from the transfer case, but I've heard mixed reviews on how well they work. You...

Here is a breakdown of the wiring color codes, and the associated voltages on each, for engine running and ignition on. The signal from the mass airflow sensor should steadily sweep from 1.9 to 5 volts as you press and...

Hi there. Check the battery cables and see if they are tight and clean. If the battery cables are tight and clean, then check the ground wire to the fuse box and see if its loose or corroded. If the...

The dealer will not try and do any repairs unless they can verify and duplicate the problem. If they cleared the codes and then cannot verify the problem and light coming back on then they are not going to do...

Generally, the alert lights or check engine light (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement), a faulty O2...

Hey Big B. Thanks for contacting us. What you're describing is typically associated with a damaged ignition switch. This could be due to an exposed wire, poor electrical ground or even an ignition relay that is faulty, causing the ignition...