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Originally Posted by Ian
33. High voltage (low vacuum or low flow) at mass air flow sensor (or MAP sensor)
42. Fault at electronic spark timing circuit OR
Fault at direct ignition system OR
Fault at fuel cutoff relay circuit
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Make sure the EST is plugged in, all grounds are good, and that the distributor is plugged in properly. As far as the code 33, check all vacuum lines and make sure nothing is ripped or disconnected.
Good luck.