For 1990-2009 cars

# HARD STARTING/REDUCED PERFORM. INJECTOR PART NUMBERS

#### MODELS AFFECTED: 1981-1985 DEVILLE AND FLEETWOOD BROUGHAM (RWD) 1980-1985 ELDORADO AND SEVILLE 1983-1985 CIMARRON 1985 DEVILLE AND FLEETWOOD

Some 1980-1985 throttle body injection equipped vehicles may experience hard starting or reduced performance if the incorrect injectors are installed when servicing a vehicle. Injector flow rates vary, therefore, injectors with different production part numbers are not generally interchangeable, even though they may appear to be identical. The injector is identified by the production part number imprinted on the top surface of the injector, see Figure 1. The color coded paint spot which may appear on the top of the injector is used for manufacturing purposes only and must not be used to identify proper injectors.

It should be noted that the 1985 and 1985 1/2 FWD-C injectors and fuel meter assemblies are not interchangeable. These can be identified by the color of the ISC motor and throttle lever. The 1985 injectors listed in the attached chart must be used on a throttle body having a "gold" ISC motor and throttle lever. Likewise, the 1985 1/2 injectors, which were used in production beginning with B.C. No. 242505 (Engine Unit Number 350000) must be used on throttle bodies having a "black" ISC motor and throttle lever.

#### IMPORTANT: If exchanging a fuel meter assembly with one from a known good vehicle for diagnostic purposes, the two throttle bodies must have the same color throttle lever.

The chart,located on the reverse side, summarizes fuel injector usage on 1980-1985 throttle body equipped vehicles and should be used to determine if the vehicle has the proper injectors based upon the production P/N imprinted on the injector. Listed are the original equipment part numbers, the production part numbers of service parts and the GMWDD service part numbers of the service kit.

CADILLAC THROTTLE BODY INJECTION - INJECTOR APPLICATION CHART

ORIGINAL EQUIPMENT SERVICE INJECTORS INJECTORS ---------- --------- GMWDD SERVICE YEAR PRODUCTION P/N PRODUCTION P/N KIT P/N ---- -------------- -------------- -------- 1980 6.0L (E/K) 5233565*DED 5234210*DED 17079012

1981 6.0L (C/E/K) 5233565*DED 5234210*DED 17079012 17061906*B

1982 HT4100 (C/E/K) 5233760*DED 5233760*DED 17078258 5233760*B OR 17071189*RPD 5233760*B OR 17071189*RPD OR 17071189*B 1983 HT4100 (C/E/K) 5234085*B 5234085*B 17079500 1984 HT4100 (DW/E/K) (5235204*RPD)l (17111276)1 1985 HT4100 (DW & E/K EXPORT)

1983 2.0L EFI (J) 5234395*RPD 5234395*RPD 17079694 1984 2.0L EFI (J) 1985 2.0L EFI (J)

1985 TFWD C 5234085*B 5234085*B 17079500 IDENTIFIED BY "GOLD" (5235204*RPD)l (17111276)1 ISC MOTOR & THROTTLE LEVER ON THROTTLE BODY

1985 HT4100 (DW/E/K) 5235132*RPD 5235132*RPD 17110659 1985 HT4100 TFWD C (EXPORT) (5235205*RPD)1 (17111277)1 1985-1/2 HT4100 TFWD C (BEGINNING WITH EUN 350000) IDENTIFIED BY "BLACK" COLORED ISC MOTOR & THROTTLE LEVER ON THROTTLE BODY

1 AVAILABLE MARCH 1985 - REPLACES EXISTING SERVICE KIT.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.