Odd Fire TBI

[1project2many]

I love the 1 step at a time approach. No matter what system you're working with you've got to get it running before you can worry about doing anything more. It's the only way to learn and you're doing a good job on such an oddball system.

Agreed. Getting it to run is a good plateau to rest on. Fuel pressure at 12-13 psi is good. I'd aim for as much common ground between the two systems as possible. Do you have the info to change the number of cylinders to three? I can dig that up...

[dave w]

Agreed. Getting it to run is a good plateau to rest on. Fuel pressure at 12-13 psi is good. I'd aim for as much common ground between the two systems as possible. Do you have the info to change the number of cylinders to three? I can dig that up...

When I change the cylinder select value, Hex address 0016 changes. I think changing the Hex value to 03 would be the correct value?

See attached screen shot for an example of a 3 cylinder BPW (1.9 liters is half of a 3.8 liter V6 / figuring two 45 lb TBI injectors).

dave w

[1project2many]

knumcyl is a divisor and lower number of cylinders results in a higher value. Three cylinder is 96d or 60h.

[dave w]

knumcyl is a divisor and lower number of cylinders results in a higher value. Three cylinder is 96d or 60h.

Interesting; see attached.

dave w

[Willys43]

Well gents I have never been able to stabilize the secondary computor. I finally abandoned the spark control and put an HEI dist with mechanically advanced spark. Starts and runs, first time every time.

[dave w]

Thanks for the update.

dave w

[1project2many]

Interesting to note. Are you talking about the AFR? Or the spark timing?

[Six_Shooter]

Well gents I have never been able to stabilize the secondary computor. I finally abandoned the spark control and put an HEI dist with mechanically advanced spark. Starts and runs, first time every time.

Have you tried swapping ECMs from "main" to "secondary" and visa-versa to see if it's an ECM issue?