Tbi swap build thread

[pancake]

I do have rubber fuel lines in the system...the are rated for fuel injection and connect the tank to 3/8 alluminum line and from the alluminum lint to the TBI. The tank sits in the bed of the Blazer and the alluminum feul line is ran daow the fram rail to the fire wall tyhe goes to rubber. The line is not kinked anywhere...I checked.

My pump is in tank and new...I tried to switch the pump with no luck. There is a new sending unit with new hose and good fuel injection fittings.

I put the fuel gauge is by the Brake booster...between the booster and TBI....the gauge sits about 12" from the TBI, same place as RFmasters gauge

I did not know what the fuel pressure was before the swap ...I ran a carb and carter fuel pump.

After calling Brian Harrris at Harris preformance he told me to try a new spring...he said when the spring warms up it could lose pressure....I ordered a new spring from Sean.

If this does not work I might get a new fuel tank...change the filter and fuel pump screen and clean out the fuel line.

I am out of town right now but will be home this weekend and will take some pictures and post them.

Thanks for the input

[68 TT]

Originally Posted by pancake

The tank sits in the bed of the Blazer

I think it may be related to fuel tank elevation relative to the throttle body.

This non-stock configuration may need a helper pump to keep the pressure up.

If you can't lower the tank to below the bed try adding an in-line EFI pump to help pressurize the system and get the air out of the lines.

You never know what kind of weird things will happen when something as simple as the fuel tank elevation is changed.