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Engine missing a beat, i think 900 1990

Dear Harvey,

Good p.m. and may this find you well. These symptoms - based on posts I've read - could result from:
(a) a failing Idle Air Control Valve
(b) a loose or cracked vacuum hose
(c) a failed intake manifold gasket (the earlier red/orange gaskets were prone to failure; the newer ones are pale green).

The things you changed could also have contributed to this.

Let us know if changing any of the above, cures the problem.

Yours faithfully,

spook









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