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SVT Performance (2002-2004) The place to chat about any 2.0L SVT DOHC Zetec engine performance, tuning and exhaust related upgrades.

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Old 07-21-2013, 12:21 PM   #15
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What I Drive: 2001 Mazda Tribute (2.0L Zetec)

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Originally Posted by jdmzx5 View Post
I have been told by engineering that it's a risk to burn the drivers, and pcm prices are high. Also I've replaced many pcms with failed drivers due to bad coils and high resistance power circuits to the coils. The factory setup fires one coil, then when the field collapses, the other coil fires, the system Fires multiple sparks below 2500 rpm, and the rest is waste on compression and exhaust. What is your reasoning for disliking waste spark? Getting rid of it won't free up power
Ok so then in this instance my COP setup fires 2 coils at one instance. However, it still requires less amperage to fire them both than it does to fire the stock single coil. I still don't see how the drivers are going to burn up with my setup? From computer to spark pug tip it has less resistance than the stock setup did.

I have two spare PCM's here that I bought for under $100 at the local scrap yard... not sure where you are getting your prices, unless you are a tech @ a dealership replacing them with brand new units?

Why don't I like wasted spark,
I don't see the need to waste spark on the exhaust stroke. I would rather fire my coils once per 720 of engine rotation then twice. Seems like it would be much easier on the system to have them only fire once. Then all these worries about overheating or burning drivers and other system components would be cut in half.
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