Opethmike Z7U manifold custom conversion

[Bitsyncmaster]

I found the correct ignition monitoring circuit designing my idle ECU. It uses one optical isolator, two resistors, one zener, one diode and one capacitor. If you don't have +5 volts you would need those components. If you don't find a solution to your problem, I can ship you a board with the circuit to play with.

[opethmike]

Solved the last of my sync loss issues by moving the input for the tach signal to the white/grey wire coming out of the idle ECU.

[opethmike]

Video of the car running:

[Spittybug]

Sounds great!

[opethmike]

I should have known it would happen; I am now starting to seriously consider ignition control as well.

[Spittybug]

Now that you've solved your electrical issues and got it running just fine with the fuel component, the ignition control is a snap. Did you build the VR circuit on your board already? Taking the plunge and disabling the mechanical advance is the only "commitment" you end up making. Although I did mine with a quick tack weld, I'm sure that a strategically placed wire tie would work to hold the mechanism until you were sure you wanted to keep it that way. Just pay attention to the manual and make the correct jumper settings on your board and you are on your way!

[opethmike]

Now that you've solved your electrical issues and got it running just fine with the fuel component, the ignition control is a snap. Did you build the VR circuit on your board already? Taking the plunge and disabling the mechanical advance is the only "commitment" you end up making. Although I did mine with a quick tack weld, I'm sure that a strategically placed wire tie would work to hold the mechanism until you were sure you wanted to keep it that way. Just pay attention to the manual and make the correct jumper settings on your board and you are on your way!

I didn't build mine; I purchased a pre-built unit. I'll have to read/find documentation on it to see the details of the ignition control it is built with.

[opethmike]

Wow, thread resurrection!

Just about a year to the day after I completed my EFI conversion, I converted the idle control successfully tonight. With it being 40 degrees out tonight, I was able to tune to the whole coolant temperature range. Nice!

Yesterday, I pulled the ballast resistor and relay out of the equation, after installing a modern ignition coil. These were both big steps towards getting my engine bay cleaned up, looking good, and not looking like a random mishmash of wires, hoses, etc.