What is the Green Line on a Chevy TBI?
What is the Green Line on a Chevy TBI?
The green line is the vent line that goes to the tank. You have three lines attached to the tank: fuel line, fuel return line and ventilation. The vent line is missing on cars with ventilated gas tank caps. Due to a cam change I am short on Vacuum at idle.Is there a way to add a vac pump in the system to solve this problem.
Can a GM TBI be used for fuel injection?
TBI Fuel Injection Conversion using a GM TBI EFI system! One of the most popular EFI conversions to older Chevy engines or any engine for that matter is the GM TBI system using the 1227747 ECM. There are many others that will do the same thing but the 1227747 is most well known and documented and will be the basis for this article.
What is the TBI code on a 1990 Chevy truck?
Consult a service manual or see below for any check engine light code definitions. You can use a late 80’s or early 90’s GM TBI definition. If you have access to a scan tool use a hook up for a 1990 350 cu. in. 5.7L Chevrolet truck. For some scan tools enter VIN 10th“L” 3rd“C” 8th“K”.
Why is my TBI fuel injection light on?
Troubleshooting your TBI Fuel Injection System Most of the problems encountered while installing your fuel injection system or after a time of operation are very simple. If your check engine light is on you more than likely have a hard fault meaning something is grounded out, unplugged, operating out of range or has gone bad.
What should fuel pressure be on a TBI fuel injection system?
Fuel Pressure is critical to the operation of a fuel injection system. Always check to insure that you have the proper fuel pressure. Fuel pressure should be a constant 10 – 15 PSI on a TBI fuel injection system and is typically around 12 – 13 psi. Higher pressure than 15 psi indicates that there is an issue with the installation.
Consult a service manual or see below for any check engine light code definitions. You can use a late 80’s or early 90’s GM TBI definition. If you have access to a scan tool use a hook up for a 1990 350 cu. in. 5.7L Chevrolet truck. For some scan tools enter VIN 10th“L” 3rd“C” 8th“K”.
Can a TBI be used as a return line?
These fittings are not suitable to use as a return line because they have an orifice in them and restrict the flow of fuel back to the tank. If you have installed your return line to a “vent” line you will need to route the return line in a different fashion. Fuel pressure on a TBI unit should stay constant under all throttle conditions.
Can a GM throttle body injected TBI be used?
Many still out there with TBI vehicles needing help getting more modern power levels and fuel mileage from older GM throttle body injected vehicles without going to the process of rewiring the vehicle to run a more modern fuel injection system.
