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

cfi help please?

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Old Mar 1, 2012 | 09:26 PM
  #1  
jollythought's Avatar
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Joined: Oct 2010
Posts: 76
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From: Denton, TX
Car: 1983 Trans Am
Engine: Lu5
Transmission: TH700R4
Axle/Gears: 3.23
cfi help please?

Quick history- 83 T/A with crossfire fuel injection. I just recently change the fuel pump and when I tried to start it, fuel shot out of the top of the front throttle body. I guess the more info the better..the car was running fine until the fuel pump died and it sat for about 2 years, not sure if this is a factor.

I'm unfamiliar with throttle bodies and I'm not sure where to start. Any advice on what to look for would be amazing. Also any recommendations on books over cfi would be helpful. I have the haynes repair manual and the Pontiac Service Manual but neither really seems to go in depth on the crossfire.

Thanks in advanced
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Old Mar 2, 2012 | 02:42 AM
  #2  
Dens71TA's Avatar
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Joined: Dec 2004
Posts: 1,132
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From: Midwest
Car: '82 Recaro T/A, '71 Trans Am
Engine: 305CFI/455HO
Transmission: TH700R4/M22
Axle/Gears: 3.23/3.42
Re: cfi help please?

It sounds like either the rubber diaphragm on the fuel pressure compensator or an o-ring on the fuel injector pod failed.

If it hasn't ever been done in the last 30 years it would be a good idea to install a new gasket kit in the throttle bodies. Also check the throttle shafts for wear and get bushings installed if they're loose. This will cause rough idle and make it impossible to properly balance the throttle bodies.
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Old Mar 2, 2012 | 12:13 PM
  #3  
jollythought's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2010
Posts: 76
Likes: 0
From: Denton, TX
Car: 1983 Trans Am
Engine: Lu5
Transmission: TH700R4
Axle/Gears: 3.23
Re: cfi help please?

Ok I will try that, thank you for the advice
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