TBI question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Mr_Rich** · 09-05-2018, 05:18 AM

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?

ChevyTech · 09-05-2018, 01:27 PM

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

**Mr_Rich** · 09-05-2018, 02:50 PM

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.

ChevyTech · 09-05-2018, 05:59 PM

You're welcome!

09-05-2018, 05:18 AM	#1
Mr_Rich Registered User Join Date: May 2006 Location: Santa Maria, Calif. Posts: 781	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? __________________ 1989 K1500 Chev. EC Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit. 2009 Hummer H3T 3.7L 5M (sold) 1997 K2500 Chev. EC 7.4L/ 4L80E 2018 Dodge Ram 2500 HD R/C

09-05-2018, 01:27 PM	#2
ChevyTech Registered User Join Date: May 2004 Location: Minnesota Posts: 4,620	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 __________________ For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too.

09-05-2018, 02:50 PM	#3
Mr_Rich Registered User Join Date: May 2006 Location: Santa Maria, Calif. Posts: 781	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. __________________ 1989 K1500 Chev. EC Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit. 2009 Hummer H3T 3.7L 5M (sold) 1997 K2500 Chev. EC 7.4L/ 4L80E 2018 Dodge Ram 2500 HD R/C

09-05-2018, 05:59 PM	#4
ChevyTech Registered User Join Date: May 2004 Location: Minnesota Posts: 4,620	Re: TBI question You're welcome! __________________ For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too.



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