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Please Note:
All of these instructions / diagrams are to be used at your own risk, like most things there is more than one way to do the same thing, what we have tried to do is to offer a method that we have tested or that others have tested for us. No warranty expressed or implied. Use at your own risk. |
MegaSquirt requires a pulse from the ignition to syncronize the fuel injection. This sync can be obtained by using the - coil output of the after market electronic ignition.
You can test your input connection by monitoring IRQ-1 at R13. First set up MS to monitor IRQ with the center front panel LED. Disconnect the HV lead at the distributor and tape it to the engine block at a 1/8 inch gap. Put on the hand brake and the car in neutral. Now turn the engine such that the crank pulley passes from 20º BTDC to TDC. The IRQ LED should go from On to OFF at ~10º BTDC for most cars with distributor (but it may be from 5º to 15º, usually this is called the static timing)
The MegaSquirt will in turn then drive a single external coil.
