Suzuki xl7 2004 firing order

Engine timing is done electronically. It is based on Cylinder 1 being a few degrees before TDC (Top Dead Centre of firing stroke).

Valve Timing is set using marks when you change the timing belt or chain. That is set with Piston 1 at TDC on FIRING stroke.

Here is the firing order. It is nice and easy, 1, 2, 3, 4, left to right.

https://www.google.com/search?q=2007+suzuki+forenza+firing+order

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For what car?

Look up the order they fire in try to get 1 at top center with the other piston it fires with.

Neither are hugely wrong.

Does it have a timing chain or belt. If it has an over square engine and the timing chain or belt has snapped, then the valves which let in the fuel and air and let the exhaust gases out travel up and down driven by the cam shaft and the pistons will travel up and down driven by the crank shaft. Without the belt or chain to keep them timed, they meet with great force, at least a top engine rebuild.

To check if the timing chain or belt has broken, you'll need to take the belt/chain cover off. Disconnect the battery first.

If its an under square engine, the pistons have a longer bore to travel, the pistons and valves don't meet.

standing in front of the vehicle its the one at 4 to 5 o clock pisition the fireing order is 165432 . And if you are doing timeing chain work # 4 clinder is the one that has to be at TDC to align the timeing chain for correct timeing

Hi, your diagram is below. Also threw in the timing marks. Not sure how hard it is to get the top cover off the timing chain as I have not worked on this engine. If you could get a peek at those timing marks you could verify valve timing. Let me know if you have more questions, and thanks for using FixYa.

Try a compression test, as it sounds like your car has jumped timing. (Belt or timing chain)

Here is the diagram you ask for. While it says it is for the 3.0L V6, it is the same for the 4.0L V6 if that's what you have...

number 1 plug wire should be pointing towards the front drivers corner . drivers side piston order is 1-3-5-7 front to back .passengers side front to back is 2-4-6-8 then the firing order is 1-8-4-3-6-5-7-2 . if you pull the # 1 spark plug and put your finger in the hole /remover power wire while doing this at the dist.bump the engine when you feel a rush of air that's the compression stroke when the piston is at the top of it's compression stroke . pop the cap look to make sure the rotor is pointing at the # 1 piston roughly and place cap back on so the # 1 terminal is over the wire end of the rotor contact tip and work clockwise around with the firing order and hope this helps .if it still dont want to run then you may have jumped timing chain or stretched they will jump out of time and cause a headache.

Carbon build up on pistons raises engine compression.This is normal.Go up one grade on gas and/or put some fuel additive.If this doesnt solve it,have timing belt/chain inspected may need replaced