Firing order?

HI there ,

I have posted the 3.1 &b 3.4 engine, if this is not your engine let me know and i will pre post. Check the set fault codes as well to see whay the check light is coming on.

Mark (mhpautos)

Firing order 1-2-3-4-5-6 , just like its written, the front of the vehicle is at the left of the numbers so

2 1 is on your left
4 3 is the middle
6 5 is on your right

1, 3, 5 is the rear cylinders left to right

Hello, I'm Danny
Here is the information you requested. The firing order is 1-2-3-4-5-6 I've attached a picture below of the cylinder locations for your Grand Am. Hope this helps and thanks for using 2CarPros.

My info showed this for 3.4 firing order. 123456. If the you think the problem is spark issue, you can use a digital multimeter, take an inductive reading from plug wires, engine running. You don't take the plug wire loose or penetrate the insulation. One meter lead goes to ground, the other lead, just touch the plug wire. As an example, say four wires show around 1/2 volt and two show around zero. If the two that show zero are on the same coil, I suspect the coil first. You could swap the coils around, see if problem follows the suspect coil. If coil is ok, I suspect the ignition module. I'm talking about no spark. There are other issues that can cause a misfire. I just wanted to add, when using meter with engine running, you have to be careful not to get the meter leads caught in belt--pulleys--fan or anything.

Here ya go....