Proposed solutions for Intermittent issues Under The Hood

Recently,Brad Bergholdt,an automotive technology instructor at Evergreen Valley College in San Jose, Calif made some suggestions for intermittent issues Under The Hood.His suggestions proved practical.

Sometimes car goes out with no problem but if Car owner stop somewhere for 15-20 minutes, it won't start;Sometimes car won't idle smoothly in park or in dre with foot on the brake.Then you need car diagnostic tool All these intermittent problems are certainly frustrating but solvable.

In both cases it's likely the on-board diagnostics system, or OBD-II, has set a trouble code, which could be hugely helpful in determining the cause.Additionally, a scan-tool snapshot of engine parameters can be taken during the no-start or a runs-rough episode, providing sensor inputs, output commands, fuel and idle system correction percentages, and a host of other pertinent information.The list can be compared to a previous snapshot taken when the vehicle was running fine.Scan data is great, but one needs to remember the listed values are what the engine computer believes is happening, which isn't always the same as the actual conditions occurring beneath the hood.

He points out sometimes even with great car diagnostic tool information, you still need to resort to old-school tests and observations.

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