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cut fuel can only be done , so many ways. (each car make can be diff. I can help)
kill the drummer boy (CMP) (with temp DTC 41/42)
kill spark directly to the Ign coil(s). ECU detects this and kills fuel in 1sec. or so.
killing CMP has the benefit if , allowing ECU to react fast, it must cut fuel.
CMP = CAS (cam angle sensor)
killing power to the ecu and worse everything, is not good to do , 100 times a trip.
not smart to torture any electronics, like that.
consider this, when you flip a switch , the rise time is almost instantaneous.
The Ecu was designed to allow that , action but not in to excess.
how ever one can design a so called soft power on circuit.
basically a RC circuit that gates on a Bmos driver. (similar to an injector driver)
there are lots ideas and ways of doing this.
The ecu does have lots of internal protection.
for things like the A/C clutch solenoid that products up to 400vdc back EMF spikes.
it is not weak, but torturing it needlessly is not wise , IMHO.
im a tech, im the guy that repairs the damage to the PCB's after the above.
worst is Lighting. (lots of stories)
cheers
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