Possible Cause & Correction

Perform careful visual check.
Check fuel pressure. See CHART A6 - FUEL SYSTEM PRESSURE TEST chart in the TBI TESTS/CODES article in this section.
Check for water contaminated fuel.
Check TPS for binding or sticking.
Check fuel pump cycle system.
Check ignition timing.
Check alternator output voltage. Repair if less than 9 or more than 16 volts.
Check for open HEI ground circuit No. 453.
Check canister purge system.
Check EGR valve operation. See EGR SYSTEM CHECK chart in the TBI TESTS/CODES article in this section.
Check for incorrect or defective CALPAK or PROM.