If you look at pic 1, it provides the firing order. Pic 2 shows the cylinder orientation.
If you haven't worked on the ignition system, the firing order shouldn't have changed. Oftentimes, a backfire is caused by either a lean or rich fuel mixture. Do you notice any black smoke from the exhaust?
Take a look through this link and let me know if it is helpful in any way:
Also, do you know if the timing belt has been serviced in the past?
Let me know.
Joe
See pics below.
Images (Click to enlarge)
May 14, 2022 at 10:15 PM
CHEST0722
MEMBER
5 POSTS
i need the firing order please. The plugs were put on by the length of the wire for 2004 Suzuki Forenza. If got throttle body going crazy. Please give me the firing order only.
May 15, 2022 at 5:22 PM
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STRAILER
CERTIFIED EXPERT
53,854 POSTS
It should have numbers on the ignition coil to match up to the firing order, here is a diagram for you to look at the number should be in this area. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
Image (Click to enlarge)
May 16, 2022 at 1:27 PM
CHEST0722
MEMBER
5 POSTS
need firing order, the wire was put on using the length of the wire, mistake. What is the firing order? The throttle is going crazy.
May 16, 2022 at 5:27 PM
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SQM
CERTIFIED EXPERT
6,383 POSTS
Hello,
The firing order for this engine is 1-3-4-2.
The number 1 cylinder is the one on the left side (if you are facing the engine).