1989 Buick Park Avenue Error Code 42 & Car stalling

1989 BUICK PARK AVENUE
99,000 MILES • 6 CYL • 2WD • AUTOMATIC
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NURSEDAWG
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After car stalling on/off for a year my wife had fuel pump replaced for >$600. The mechanic did tell us the car might still stall and it will need and ignition sensor module for another $700. So of course the car stalls next day and engine code 42 comes up. What does this mean? Why is the Ignition Module so expensive? I'm thinking I should buy a 2nd Park Ave for body and engine parts. Car now runs with great power, overall no complaints other than trying to find quality parts.
Jun 29, 2010 at 3:34 PM
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RASMATAZ
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DTC 42 Electronic Spark Timing (EST) or Bypass Fault
Jun 29, 2010 at 3:43 PM