Subject: Not diy_efi....how to disable a computer carb

[neilaura at accessworldnet.com]

At 03:26 PM 6/14/99 -0500, you wrote:
>I would still check the M/C solenoid. The solenoid controls the primary
>metering rods buy moving them up and down at a duty cycle
>controlled by the ECM and its inputs. My 82 T/A did the same thing your olds
>is doing , running extremely rich. The Q-Jet runs rich because a spring on
>the metering rods pulls them completely out of the primary jets. The M/C
>solenoid when energized pushes the rods down into the jets leaning out the
>mixture. The only way to bypass the M/C solenoid is to convert back to the
>vac type metering rods if this is possible . Fix the carb or go to a non
>electronic Q-Jet and non computer HEI, of course the ECM now has nothing to
>do.
>Don

That's only part of it Don.
When the solenoid pulls the needles down and closes off the jets it, also
opens an air bleed valve to further lean out the mixture.
Possible options are. Physically hold the needles half way in/out of the
jets.  Or use a 555 as a base for a generating a 50% square wave, and
disconnect the engine check light.

Neil