TBI question
 

The throttle body units have a part number that indicates what vehicle they were used on. Is there some kind of marking on the individual injectors used in the throttle body that identifies whether they are used for 4.3L, 5.0L, 5.7L, or 7.4L engines?

Re: TBI question
 

Color code Application Flow rate Part #
Black/White 1-3/8" bore 2bbl, from 2.8l truck ??? GM 5235430 *RPD
Yellow/Blue 4.3L ??? GM 5235203 *RPD
Green/White 5.0L 40 lb/hr GM 5235279 *RPD
Orange/Black 5.7L pickup 55 lb/hr GM 5235206 *RPD
Yellow/Brown 5.7L Cop Car 65 lb/hr ???
Blue/Black Late big block pickup 80 lb/hr GM 1708430 *RPD
Dark Red/Dark Blue big block pickup 90 lb/hr GM 5235231 *RPD

Source:
http://www.thirdgen.org/techboard/di...ctor-info.html

Re: TBI question
 

Thanks ChevyTech! The reason I asked is because I mixed up the throttle body with the injectors on my truck. I have the 17087019 (5.0L) throttle body with orange/ black injectors on my truck. The injectors came off of a 17089021 (5.7L car) throttle body that came with the engine I now have installed in my truck. Why did I do that? I had long since forgotten that one of the TPS sensor screws seized and snapped off in the throttle body. That's the reason I did what I did. I had to verify what I have since I was thinking about selling the spare throttle body. I have to fix that seized screw hole.

Re: TBI question
 

You're welcome!