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

Fuel issues?

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Old Mar 18, 2025 | 01:39 PM
  #1  
Tony Scotland's Avatar
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From: Scotland
Car: 1989 Camero Iroc Z convertible
Engine: 305
Transmission: Auti
Fuel issues?

Hi, working through the car, 1989 305 tbi. I have replaced the fuel filter, fuel pump relay and complete throttle body. Now have fuel up top. Turn the key on and you hear the fuel pump prime. Turn the motor over and you get a squirt of fuel out of the injectors then nothing. Car runs well off a can of petrol. Any ideas on where to go next? Or how to check fuel pump pressure? Thanks
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Old Mar 18, 2025 | 02:03 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Fuel issues?

You’re saying the injectors leak ? Or just fail to pulse while cranking ?
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Old Mar 19, 2025 | 05:15 AM
  #3  
Tony Scotland's Avatar
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From: Scotland
Car: 1989 Camero Iroc Z convertible
Engine: 305
Transmission: Auti
Re: Fuel issues?

They seem to get a quick pulse when first cranked over then nothing after that
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Old Mar 19, 2025 | 08:24 AM
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Tuned Performance's Avatar
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Fuel issues?

Is spark consistent ? Sounds like a bad icm or could be a vats issue.
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Old Mar 20, 2025 | 03:21 AM
  #5  
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Re: Fuel issues?

Connect a scan tool, find out if the computer has an RPM signal when cranking.
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