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Engine Light keeps flashing & pistons sound like they are coming thought hood

(1996 Mercury Cougar)
in Springfield, VA on July 12, 2010
At idle, the motor has a thump when the pistons fire.
Sounds like a piston misfire.

The engine light may be something else.
Displaying 2 answers & 0 comments
Popular Answer
on July 12, 2010
Try to retrieve the diagnostics trouble codes from the computer to have an idea why the engine light is flashing.
on July 12, 2010
If there is a low sounding knock which increases when you idle up a bit you most likely have bad rod bearings.
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