What to DO?

[Joe Boucher]

I retrofitted a TBI system on my 81 Suburban.  The biggest headache for me
was the fuel pump.  My decision was to mount the fuel pump in the tank and
modified the '81 sending unit.  You could mount the pump inline.  I didn't
research if any sending units would bolt in.

You,ll find a flat spot on the firewall suitable for passing the wiring
harness through.

Pickup all the wiring harness you can.  Including the interior harness.
The ALDL connector is part of the internal harness.

Be sure and replace any rubber hose with fuel injection hose.

You'll need a device to put inline with the speedometer cable to provide a
speed signal to the computer.

I think the magnitude for retrofitting a TPI vs TBI is the TPI will be a
bit harder but not too much.  If you scab a TBI off a truck, you'll have a
unit that is setup for that size of vehicle.  A TPI will require some
programming to optimize.  And most of the TPI's you'll find will be 305 units.

I'll think of more as time goes on.

 


At 10:53 AM 7/24/99 -0600, you wrote:
>Hello
>I have a 1986 Chevy Suburban 4x4,  this truck has a 350 freshly rebuilt 
>engine with a Q-jet carburetor, and I would like to change it to fuel 
>injection. I also have to pass emission inspection, so the air pumps / EGR 
>must be "there". If this is the wrong group to ask this question, please 
>forgive me. What type of fuel injection should I try to install. Tuned Port 
>looks like it would require a lot work, a TBI looks like you could just 
>replace the Q-jet and add the electronics. Port injection with a throttle 
>body, and new intake manifold looks like best setup but also the most 
>expensive. The reason to change to fuel injection, is to learn how fuel 
>injection operates, and to hopefully have a better running truck.
>
>TIA
>
>David 
>
Joe Boucher
'70 RS/SS Camaro  '81 TBI Suburban