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

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Old May 23, 2006 | 12:13 AM
  #1  
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
???

Ok i have a 92 L03 with 150xxx miles on it and when i press the gas it doesnt want to accelerate like it should. It has no power at all not even the power of a 4 cylinder more like 2 cylinders i have put a plethora of new parts on it but at this point i am just stuck at what this new problem could be caused by It kinda sounds like its not geting enough fuel. I checked the injectors they have the right voltage and the ECM and all the sensors are brand new so its probably not elecronicly related. But the thing that stumps me is the car is still drinking up gas, maybe its lack of spark? Idk. Any suggestions would be appriciated.

Last edited by 25th rs camaro; May 23, 2006 at 12:26 AM.
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Old May 23, 2006 | 02:14 AM
  #2  
joshnryandad1's Avatar
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From: northeast, oklahoma
Car: 1991 camaro rs
Engine: 3.1
[QUOTE= But the thing that stumps me is the car is still drinking up gas, maybe its lack of spark? Idk. Any suggestions would be appriciated.[/QUOTE]

does the car smoke?
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Old May 23, 2006 | 11:19 AM
  #3  
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
no sir no smoking at all but i can smell a small trace of burnt oil in the exhaust
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Old May 23, 2006 | 12:10 PM
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92rsvortec350's Avatar
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From: TN
Car: 92 rs z28 clone
Engine: forged 350
Transmission: 700r4 fully built
Axle/Gears: moser axles eaton posi 3.73 gears
Do you still have your cat. if so it could be stopped up.
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Old May 23, 2006 | 09:52 PM
  #5  
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
ya i still have my cat on the car but how can i tell if its stopped up??
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Old May 23, 2006 | 09:55 PM
  #6  
flaming-ford's Avatar
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From: Ohio, near columbus
Car: 89 iroc-z
Engine: 305tpi
Transmission: wc-t5
Axle/Gears: 10 bolt 3.08 posi (4 now)
who cares gut it and put it back on hehe.

On a more serious note though a lot of people tap them with a hammer and if they have stuff ratteling in them you know they are bad. Also i suppose you could use a vaccum gauge to check some how, which would tell you if there is a big restriction at the cat. Anyways g/l imo just replace it or get rid of it, it definetly won't hurt you with the age of these cars.

You can get a hi flo non airpumped catalytic converter that's stainless and for bigger pipes if needed for 70$ or so from catco on summit.
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Old May 24, 2006 | 03:01 PM
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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
well as im taking a look at the injectors the left side isnt spraying at all its more of a drip. so im taking them off as i type this to have the flow calibrated or what ever the guy at the shop is gonna do to see if there good if they test good which i hink they probably will what is the next step?
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Old May 24, 2006 | 03:23 PM
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From: Dixon, IL
Car: RS
Engine: 305
Transmission: 4L60
Axle/Gears: 3.42
a rebuild kit for those injectors is about 35 bucks
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Old May 24, 2006 | 10:13 PM
  #9  
83Chevy_Camaro's Avatar
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From: Maine
Car: 1988 Camaro
Engine: 1988 chevy pickup 350 TBI (rebuilt)
Transmission: 700r4- Bowtie overdrives
Axle/Gears: 2:73's
Can we Just buy new injectors? I cant find any!! only TPI injectors..
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Old May 25, 2006 | 12:15 AM
  #10  
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
ya i found some new ones from the gm parts place but there 169$ a piece
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Old May 25, 2006 | 06:57 AM
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RBob's Avatar
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
It may be that the screens on the injectors are gettting clogged. this would cause poor fuel flow. The screens are included in TBI rebuild kits. Along with all the gaskets and such.

If it is the actual injector the automotive recycle yards are full of them. Lots of 305 TBI vehicles from Caprices', to vans, to pickups have them.

Look for the green and white paint dabs as a sign of 305 injectors.

RBob.
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