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

tbi wont start

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Old Dec 17, 2006 | 07:59 PM
  #1  
91greenbird's Avatar
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From: southern maryland
Car: 2012 Ram express
Engine: 5.7 hemi
Transmission: auto
Axle/Gears: 3.55
tbi wont start

well i was driving my daily driver tbi going 60mph when it just cut off real fast and now it wont start back up. Battery is fine it cranks and turns over but doesnt start pulled the air cleaner and the damn fuel injector will not spray the fuel pump is working and when i disconnected the fuel lines coming out of the filter it sprays out fuel likes its suppose too. What is the problem do i have a bad injector not even one drip sprays. Car has had full tune up 3 weeks ago.
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Old Dec 20, 2006 | 10:27 PM
  #2  
liquidh8's Avatar
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From: Shippensburg, PA
Car: 1981 Buick Century Wagon
Engine: 87 GN engine
Transmission: 2004R
Axle/Gears: 3.73
I would check out you oil pressure sender. If the ECM see you have no oil pressure, it kills he fuel. If memory serves me right. O, and check for spark, cause I think your ignition module plays into the injectors firing. No spark, no fuel if the ignition module is bad, or the pick-up.
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Old Dec 20, 2006 | 11:33 PM
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From: michigan
Car: 92' firebird
Engine: L03
Transmission: 700R4
Axle/Gears: 10 bolt POSI 3.73's
I had the same exact problem with my firebird this summer. After many hours of diagnostics I finally found the problem.
The ignition control unit which is located under the distributor cap. it is the black plastic box with 2 screws in it. Take it off and get it checked out at autozone does it for free.

Save yourself sometime and start with the ICU.
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Old Dec 21, 2006 | 06:35 PM
  #4  
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From: Delta, PA
Car: 89 Firebird
Engine: L05 350 TBI
Transmission: 700r4-slippin' on it's last leg
Originally Posted by redbird92'
...
Save yourself sometime and start with the ICU.

I second that opinion. I wish I would have had a place to just check mine recently..argh
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Old Dec 21, 2006 | 10:20 PM
  #5  
91greenbird's Avatar
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From: southern maryland
Car: 2012 Ram express
Engine: 5.7 hemi
Transmission: auto
Axle/Gears: 3.55
replaced the icm still no spark or fuel
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