TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Cleaning Injectors

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Old Jun 10, 2006 | 09:33 AM
  #1  
90CamaroTBI's Avatar
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From: Waldorf, MD
Car: 91 Formula, 89 IROC
Engine: LB9, LB9
Transmission: 700R4, 700R4
Axle/Gears: Posi 2.73, Posi 2.73
Cleaning Injectors

Well Since I am pushing alot mor air through my engine, I need my injectors to be up to par with my combo. I know that the are supposed to spit like an upside down cone. My left side injector seems to be fine, but my right side one does not seem to do as well. What can I do to clean them out and make them inject like new? The car has upwards of 200,000 miles and it would be cool to gain back some lost power. Thanks guys.
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Old Jun 11, 2006 | 07:43 AM
  #2  
90CamaroTBI's Avatar
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From: Waldorf, MD
Car: 91 Formula, 89 IROC
Engine: LB9, LB9
Transmission: 700R4, 700R4
Axle/Gears: Posi 2.73, Posi 2.73
Somebody has to have some kind of idea.
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Old Jun 11, 2006 | 10:46 AM
  #3  
Cadillac's Avatar
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From: Marietta, GA
Car: '91 Firebird Convertible
Engine: 305 TBI (LO3)
Transmission: 700r4, Vette Servo
Axle/Gears: 3.27 9 Bolt, PBR disks
Shifty is on vacation and it usually takes as long as 24-36 hours to get a reply from the experts on this (not me).

I'm curious about this too but know an answer/opinion will materialize soon.
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Old Jun 11, 2006 | 10:37 PM
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dwillis's Avatar
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From: Beech Bluff,TN
Car: 1991 Trans Am Convertible
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3:08
I'm curious too..I'm having inj prob too..(one kinda dripping)...
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Old Jun 12, 2006 | 07:22 AM
  #5  
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
It may be that the filter screen is clogged. If it is, a rebuild kit (about $35) has the screens, o-rings, and gaskets. Other options are to grab a set of injectors from a recycle yard (305's are easy to find), use some Techron in the tank, or pull them out and send them to a professional cleaning service.

If an injector drips while there is fuel pressure and the engine isn't running, it is a good possibility that an o-ring is bad.

RBob.
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Old Jun 12, 2006 | 07:51 AM
  #6  
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my injectors were dirty on my 175,000 mile bird and i put some gumout in the tank and it seemed to clean them pritty good. My car runs alot smoother now.
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Old Jun 12, 2006 | 06:28 PM
  #7  
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From: Beech Bluff,TN
Car: 1991 Trans Am Convertible
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3:08
I run lucas fuel inj cleaner and prem fuel on every oil change..I have a rebuild kit...I just haven't got to it..
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Old Jun 12, 2006 | 11:54 PM
  #8  
25th rs camaro's Avatar
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From: Richardson Texas
Car: 1992 Camaro Rally Sport
Engine: L03 305 E TBI
Transmission: M5
Axle/Gears: 3.08
down here in dallas theres a place called Quality Carbeuration they will pressure test flow match and clean the injectors but u got to take them off and take them there look in the yellow pages for a carb shop or fuel injection shop. i was gonna get mine cleaned cause they were more of a drip than a spray but when i took them down there he just laughed cause they werent even the same injector lol completly different. so i just bought a new set :P and all hose fuel injector cleaners..... garbage they dont do squat the only way to clean them is with the chemicals they use at a carb shop.

Last edited by 25th rs camaro; Jun 12, 2006 at 11:59 PM.
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Old Jun 13, 2006 | 11:00 PM
  #9  
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From: Beech Bluff,TN
Car: 1991 Trans Am Convertible
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3:08
The cleaners may not clean the inj like a carb shop would but they do a great job of cleaning the fuel "system"...I'm a strong believer in lucas oil products they are #1 in my book......I mean come on we all know that unless you take something apart to clean it its not getting cleaned thoroughly....
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