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Username Post: Replacement fuel injectors for 7.4l TBI -1996        (Topic#351953)
65Longroof 
Poster
Posts: 89
65Longroof
Loc: Carlsbad, Ca
Reg: 02-19-13
07-09-18 09:41 PM - Post#2739521    

Just looking for advice on replacing the fuel injectors on my k2500 7.4l Suburban. I need to do the Fuel PRessure Regulator so I might as well replace the injectors at the same time.

thanks



 
Hohnsz71 
Platinum Supporting Member
Posts: 146
Hohnsz71
Loc: Dayton Texas
Reg: 02-23-15
07-10-18 08:04 PM - Post#2739634    
    In response to 65Longroof

Check your vacuum lines and stick to ac delco Injectors and fel-pro gaskets. Just my 2 cents.

2012 silverado, bone stock.
1997 Suburban k2500, under construction.


 
454cid 
Valued Contributor
Posts: 2858
454cid
Age: 45
Loc: West Michigan
Reg: 02-18-12
07-10-18 09:22 PM - Post#2739641    
    In response to Hohnsz71

  • Hohnsz71 Said:
Check your vacuum lines and stick to ac delco Injectors and fel-pro gaskets. Just my 2 cents.



The OEM injectors are known to be a bad design. There are lots of vendors on ebay selling new and rebuilt (basically cleaned, I think) Bosch injectors for not all that much money.

It's my understanding that the OEM injectors do not respond well to cleaning.


99 K3500 RCLB


 
Hohnsz71 
Platinum Supporting Member
Posts: 146
Hohnsz71
Loc: Dayton Texas
Reg: 02-23-15
07-10-18 09:54 PM - Post#2739644    
    In response to 454cid

I checked my self, 454 vortec fuel injection and 350 vortec fuel injection are 2 completly different monsters.

2012 silverado, bone stock.
1997 Suburban k2500, under construction.


 
454cid 
Valued Contributor
Posts: 2858
454cid
Age: 45
Loc: West Michigan
Reg: 02-18-12
07-10-18 11:26 PM - Post#2739648    
    In response to Hohnsz71

  • Hohnsz71 Said:
I checked my self, 454 vortec fuel injection and 350 vortec fuel injection are 2 completly different monsters.



Where did anyone mention the 350?


99 K3500 RCLB


 
Hohnsz71 
Platinum Supporting Member
Posts: 146
Hohnsz71
Loc: Dayton Texas
Reg: 02-23-15
07-11-18 07:36 AM - Post#2739680    
    In response to 454cid

I thought that the 454 and the 350 both used spider injectors. that should explain my mistake.

2012 silverado, bone stock.
1997 Suburban k2500, under construction.


 
someotherguy 
Moderator
Posts: 28696
someotherguy
Age: 48
Loc: Texas
Reg: 08-01-03
07-11-18 08:15 AM - Post#2739687    
    In response to Hohnsz71

454cid's comment about the factory injectors is spot-on. They're known as Multecs and do not have a good reputation. I would not replace bad ones with new OR "refurbished" originals. The Bosch 4-hole design has proven to be better though you will pay a premium for them.

Richard

06 Silverado ISS / 06 Silverado SS / 06 300C SRT8


 
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