HELP WE HAVE THIS CUSTOMERS CAR THAT WILL SET THE CODE 53 EGR. HAVE RUN THRU GM TROUBLE TREE ALL TESTS FINE. VACUUM SUPPLY GOOD SOLENOID AND ECM OPERATION GOOD. MLP DOES NOT SET ALL THE TIME ALLTHOU READINGS ALLWAYS STAY THE SAME. FOUND TSB FOR UPDATED PRO...

FIX posted 4/12/2000

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