TBI Injector - Usage Precaution

CHEVROLET NUMBER: 87-T-44

SECTION: 6E - Engine Emission

DATE: January, 1987

SUBJECT: INJECTOR USAGE

MODELS: 1987 R,V,M, AND G MODELS EQUIPPED WITH THE 4.3L TBI ENGINE

Figure No. 1 - Model Number and Injector Location:

The Throttle Body Injection (TBI) assembly installed on the 1987 4.3L light duty truck engine uses injectors with DIFFERENT flow rates in each throttle bore for improved emission control. The TBI units involved are model numbers 17087090 and 17087162. If the injectors are removed for any reason, care must be taken to make sure they are installed in their proper location. See Figure No. 1 for model number and injector location.

INJECTOR LOCATION INFORMATION

Throttle Lever
Side Bore COLOR-CODED ORANGE AND
GREEN
^ New service package Part Number 17111928
^ Remanufactured equivalent Part Number 17111930

TPS Side Bore COLOR-CODED PINK AND BROWN
^ New service package Part Number 17111929
^ Remanufactured equivalent Part Number 17111931