Q: Car has a rough idle.

The fuel tank sender resistance may be off causing either a short or open causing the gauge to either be full or empty. The trunk rear fuel pump access cover should be removed and the connection removed and the fuel...

Hello. There could be a problem with the throttle cable that goes from the gas pedal to the throttle body. There could also be a problem with the throttle position sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement) in that it may not be reading the...

Hi, thanks for writing in. It is possible that the "poof" and exhaust smell (rotten gas smell?) both originated from the catalytic converter, and sulfur deposits in the converter. The engine may have backfired through the exhaust (https://www.yourmechanic.com/article/what-causes-a-car-to-backfire), setting off...

Hi there, The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. When this fails, this can cause an imbalanced air/fuel...

Hello, most often this problem is due to a dirty or faulty wheel speed sensor (https://www.yourmechanic.com/services/wheel-speed-sensor-replacement). Wheel speed sensors provide critical information to both the ABS and traction control systems (TCS). To determine which wheel speed sensor is bad (or...

Hello - your symptoms suggest the clutch hydraulics (https://www.yourmechanic.com/article/how-a-hydraulic-clutch-system-works) or mechanical linkage components have failed completely. The OEM clutch line includes a "quick-connect" fitting that may have come loose or failed, given the recent maintenance. Checking the fluid level, and...

If the transmission is not faulty (e.g., clutches slipping) and thus the problem is engine related, among the possible causes of the hesitation are faults in the throttle position sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement), mass airflow sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement), vacuum leaks, a clogged fuel...

Hi there. You might want to read this article about the P0864 OBD II trouble code (https://www.yourmechanic.com/article/p0864-obd-ii-trouble-code-traction-control-module-tcm-communication-circuit-range-performance-by-parker-hill) as it will provide you with valuable information about what the code means, what causes this code to illuminate, what components trigger the...

Inasmuch as the check engine light is on, trouble codes have been stored. Those trouble codes may be related to the no start condition and so the first thing to do is download the codes. If you desire, you can...