Tip & How-To about Chevrolet Impala
Newer vehicles have very high voltage ignition systems.
Often faulty plug wires are the culprit.
To avoid a costly diagnosis,try this,
After dark raise the hood ,vehicle running ,disconnect the underhood light,must be very dark.After your eyes become accustomed to the dark,any voltage leaks will be very obvious.Spraying glass cleaner on the ignition wires will enhance the effect.(not pure water)
Obviously,be very cafeful to stay away from the belts and fans,since it's dark.
Posted by george... on
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If the engine has no spark, check for
voltage at the coil positive terminal when the ignition key is on. If NO
voltage, then problem is on the trigger side of the coil (pickup, crank sensor,
ignition module or primary wiring circuit).
But If there is NO voltage at the coil
itself, then in that case the problem is on the supply side (the ignition
switch or ignition wiring circuit).
But if the coil has voltage, then problem may be a bad high voltage output wire from the coil to spark plugs or hairline cracks in the coil output tower.------Getting this all possibilities checked will point towards the exact faulty part which is to be replaced.----------This should help.Thanks.Helpmech.
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