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Other problems may be implicated in the case of older vehicles equipped with carburetors. Weak, disconnected, or mis-connected throttle return springs, worn shot-pump barrels, chafed cable housings, and cables which jump their tracks in the throttle-body crank can all cause similar acceleration problems.
Honda and Acura cars manufactured between 2004 and 2012 containing GPS navigation systems incorrectly displayed the year 2022 as 2002, with a time offset by several minutes. This problem was due to an overflow on the GPS epoch. [13] [14] All Porsche models with PCM2.1 are also affected according to bulletin #1904 released by Porsche on December ...
An animation of an electronic Aston Martin speedometer's self-test routine, showing how an analogue speedometer hand may indicate the vehicle's speed A Ford speedometer, showing both mph (outer) and km/h (inner), as well as an odometer in miles A digital, LCD speedometer in a Honda Insight. A speedometer or speed meter is a gauge that measures ...
The use of optical sensors is widespread in industry. They have two fundamental problems in functioning reliably for years, the optical components are extremely susceptible to dirt, and the light source ages too quickly. Traces of dirt greatly reduce the amount of light that passes through the lens and can cause signal dropout.
In theory, the closing of all rear bank valves produces an ‘air spring’ effect. However, the reciprocating effect of the piston with closed valves reportedly produces a vacuum condition where oil can get pulled past the piston rings to flood the cylinder. When VCM disengages, the engine then misfires if needing to clear the cylinder of oil.
Honda acknowledged problems with the 2006–2008 models which could cause the batteries to "deteriorate and eventually fail"; [40] software updates were issued to prolong the life of the battery, but some owners reported these updates led to reduced fuel economy and power. [41]
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The TCU also uses a ratio between the turbine speed sensor (TSS) and wheel speed sensor (WSS) which is used to determine when to change gears. If either the TSS or WSS fails or malfunctions/becomes faulty, the ratio will be wrong which in return can cause problems like false speedometer readings and transmission slipping.