EGR Valve - PROM Incompatibility

Bulletin No. T 85-10
File In Group 6C
Number 86
Date Sept. '84
SUBJECT: EGR VALVE - PROM INCOMPATIBILITY

MODELS AFFECTED: 1984 ELDORADO AND SEVILLE WITH FEDERAL EMISSION SYSTEMS
A production change was made affecting the PROM and EGR valve calibrations on 1984 Federal Eldorados and Sevilles (excluding "E" convertible) at the following breakpoints:

Eldorado - 622748
Seville - 811864

Since the PROM is matched to the EGR valve calibration and the first generation PROM's are no longer available, a PROM replacement will necessitate replacement of the EGR valve on pre-breakpoint cars.

EGR - PROM REPLACEMENT AND COMPATIBILITY CHART:

When replacing an EGR valve or PROM on any 1984 Eldorado or Seville, refer to the appropriate chart on the reverse side for the allowable EGR valve-PROM combinations.