Conversion To Throttle Body Injection (TBI)

TR6 Home

TBI - 1 Year Later

Emissions Test

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Removing Old Stuff

O2 & TPS Sensor

By Pass Block Off

Carb Adapters

Injector Installation

Fuel Tank & Lines

Fuel Pump

Fuel Lines


ECM Connections

1st Start Check List

1st Start Results

Driving Impressions

Reliability & Parts

ECM Trouble Codes

Flashing A Chip


Injector Installation

The injectors arrived along with all of the parts need for "fuel delivery" but now it's time to put the injectors into the adapters that Rick makes. Seeing as Rick has done a good job of documenting this, I "stole" some pictures and text from his web site!

The injector pictured is a very common GM injector
used in various 4 cylinder GM cars from 1990 to 1995.

The red arrows indicate where o-rings seal against the injector. 

Use a little automatic transmission fluid to lubricate 
the o-rings. It is nearly impossible to insert the 
injector without lubrication. 


An o-ring resides in this groove and is installed onto
the injector with lubrication. No sealant is used on 
the o-rings. I used Dextron ATF  as the lube for both
sets of rings.


Looking down into the injector pocket you can see 
that the small Black lower o-ring is in place. Be sure it 
is down into it's pocket before attempting to insert
the injector. Lube this ring too!


Once the o-rings are in place and lubricated, insert the injector with a twisting motion. It should stop with the top edge just proud of the aluminum pocket. Slip the half moon shaped retainer in place (it doesn't matter which way it faces) and tighten the two button head screws with a 1/8" allen wrench. Before final tightening, align the injector in whatever direction you desire.

The insert is held in place in the Zenith Stromberg carbs by four stainless steel philips head screws. No gasket between the insert and the carb body is required. BE SURE THE INJECTOR NOZZLE POINTS TOWARD THE ENGINE! The hose barb accepts a 5/16" hose and you should try to use fuel injection type hose lamps. Typical fuel pressure is 12psi but some have experimented with these injectors near thirty psi. Needless to say keep an eye on the new installation for possible fuel leaks.

NOTE: Atop the insert is a 1/8" brass pipe plug that is used to cap off a drill passage used during construction of the insert. The internal passages within the insert are large and it is doubtful they would ever become blocked but if need be, the brass plug can be removed with a 3/16" allen wrench. that's how Rick instructs you to install the injectors into the adapters. So let's see how it went for me when I had to actually do it!

This is how the injector should look when properly
seated....almost flush with adapter but not quite.
I found it to be a 2 step twist/push to get it seated.
The first step got it seated about 1/32" above the
adapter and the second push got it this point.
Here's the business end.
Here's a long shot. That brass plug blocks a hole
needed for the milling process.
The hold-down bracket installed

So far so good....nothing too mechanically or automotively (a made up word) challenging!

Next Up.....Gas Tank & Fuel Lines