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I can think of a couple of things that could potentially be causing this issue. If you have an intake manifold gasket leak near the number four cylinder, this can cause the cylinder to misfire. If the number four cylinder's...

Hi there: To be blunt; this is very baffling. If the two warning lights come on; there should be an error code stored in the ECU that can be downloaded with a digital scanner that triggered the warning lights to...

Hi there, thanks for writing in. This code (https://www.yourmechanic.com/article/p0440-obd-ii-trouble-code-evaporative-emission-control-system-malfunction-by-jay-safford_2) is for a leak or failure in the evap emissions system. By far the most common cause of this is a bad gas cap (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-gas-cap). If the seal on the cap...

Hi there. A loose pinion nut could definitely cause premature wear on the pinion bearing as there would not be sufficient preload on the bearing to maintain proper contact with the race. As for whether or not this would be...