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Re: 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue
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Originally Posted by ChevyTech
Bleed Passage:
Some TBI units have a hole (Bleed passage) to release the fuel pressure when the pump stops and some TBI units hold the pressure after the engine is shut off. I have tried to find the criteria for which units have the bleed hole and which don’t but have never been able to find GM information on this.
I will see if I have photos of this, but not today. I have more projects then time.
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Thanks!
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