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Matthew Wright

Wondering What Your Firing Order Is?

By February 24, 2013

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Firing order is the order in which your cylinders ignite. For example, in a 4-cylinder engine, the cylinders don't fire 1-2-3-4, in that order. They will fire something like 1-3-4-2. Why? This is to balance both the forces that the engine creates, and to give you a smoother ride. Sometimes firing orders can get screwed up if spark plug wires are removed without taking notes. If this has happened to you, check out the firing order reference and get yourself out of trouble.
February 24, 2013 at 6:47 am
(1) Dusty says:

I changed the spark plug wires a couple of times on a 2000 Toyota Camry (4 Cyl), discovered that the firing order was impossible. That is, the sequence of the cylinders in the block is straightforward enough; the actual firing order matters; the way the wires plug into the gizmo that serves as the distributor is beyond understanding. There is no set of drawings or technical explanations in the book I bought at the parts store. Totally different from that distributor on the old Chevy or Ford. The thing to do is carefully remove and replace one wire at a time. Keeps firing order straight, keeps the wires routed properly in the holders. If the (wiring loom?) holders are replaced, do that one-at-a-time, too.

Its a lot easier if you are a mechanic and do it real often. Once every 4 or 5 years is different!

February 27, 2013 at 9:47 am
(2) Charles says:

I have found that most new cars in Australia have alternator with regulator set to 13.8V. Further research confirmed, that such a low charging voltage is not charging modern batteries enough, hardly to 30% of their capacity. This is also causing shorter battery life. These batteries require 14.5V or a bit more, it depends on average ambient temperature and battery type.
Further new type starters are sensitive to lower voltage when starting and
the combination with constantly under charged battery is causing often unnecessary troubles.

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