engine firing order?

[zmepro]

just wondering, what order do the pistons fire in for the 2.0l?

 

[twilightprotege]

i beleive 1,3,2,4

 

[perfworks]

1 and 3 together and 2 and 4 together.
Wasted spark.
1342

 

[zmepro]

wasted spark? what do you mean?

 

[perfworks]

wasted spark? what do you mean?

WHEN number one cylinder is fired, since the coil pack is shared with cylinder 3, It will energize and fire both plugs. The 3rd cylinder is on the end of its exhaust stroke. It is "wasting" the spark.
Its just a very basic DIS ignition system.

 

[zmepro]

so wait, 1 fires and 3 is just finished expelling exhaust? so it just fires into an empty chamber? is it the same with 2 & 4?

so 1 and 3 are sycronized but 1 is compressing and 3 is ehxaust, right? or wrong?

 

[perfworks]

so wait, 1 fires and 3 is just finished expelling exhaust? so it just fires into an empty chamber? is it the same with 2 & 4?

so 1 and 3 are sycronized but 1 is compressing and 3 is ehxaust, right? or wrong?

You are correct. It is firing into an empty chamber.
It is just and easier way to have igniton control on the car rather than use a mechanical distributor to each cylinder. There are some other benifits like higher energy spark but it is just the "cheap" version of DIS

 

[Mike R]

I though ALL I-4's are 1342?

 

[twilightprotege]

yeah that's what nick said. i put them around the wrong way

 

[Installshield 2]

Pefy is right...Generally it is said that you go through spark plugs twice as fast with a system such as ours...but most plug life is under rated anyway...just something to keep in mind

 

[ddogg777]

Quote from the protege manual:

"No.1 and No.4 cylinders and No.2 and No.3 cylinder are ignited simultaneously."
The firing order is probably still 1342, but I just wanted to clarify where the spark is going..

 

[viVid]

Interesting... how do you get a higher energy spark if it is "wasting" some of it on an empty cylinder?

 

[ddogg777]

I'm doing the AEM C2DI, individual coils to each cylinder...