Spark plug leads order of firing - 1991 Isuzu Trooper

In this link, also known as 'firing order'.

https://www.google.com/search?q=2002+hyundai+accent+spark+plug+lead+diagram

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Could I have more information please. What year is this MX6? What size engine is it? Are the plug leads still in place on the vehicle?
There were 2 different V6 engines Mazda used and the firing orders were not always the same so engine size will help.
The plug leads are deliberately different lengths for a few reasons. When connected to the coil in the correct firing order the length will only allow the lead to go to certain spark plugs to help get the correct firing order, shorter leads look tidy on the engine and shorter leads cost less money to make for the manufacturer.

Which engine do you have in the vehicle? They fitted them with an in-line four cylinder and a V6. The firing orders are different for each version. I'm assuming the distributor has NOT been removed and is set correctly!
**Note, Take your time to make sure you get this right!**
The Four cylinder is the standard 1,3,4,2, firing order with number One being the nearest cylinder, (spark plug), to the belts and pulleys on the engine. Use the plug leads as a guide as they should be four different lengths. The longest plug lead to the spark plug furthest away, shortest to the nearest spark plug.
With the distributor cap removed make sure the engine is at Top Dead Centre for cylinder One. Check where the metal tip on the rotor arm is pointing as this is where the plug lead for Number One should go.
Refit the the distributor cap and insert the lead for the Number One spark plug into the hole nearest where the rotor arm tip was pointing. Now refit the remaining 3 plug leads in the Correct Order, (1,3,4,2,) into the remaining 3 outside holes in a CLOCKWISE direction. The centre hole should connect to the coil pack lead.
A V6 engine uses the same setup BUT a different firing order. (See photo). 1,4,2,5,3,6. In the photo numbers 1 and 4 are nearest the belts and pulleys.
Set your distributor as you would for the four cylinder engine, fit plug lead one and going CLOCKWISE fit them as the 1,4,2,5,3,6 sequence.

there is no set order in replacing spark plugs
however if you are asking the firing order for the plugs leads to fit to the spark plugs, simply remove one lead at a time , one plug at a time and replace that lead then move onto the next plug

Not enough information to answer. Need manufacturer, year, model, engine size, and 2WD/4WD/AWD as applicable in order to answer the question.

need to know what year, make, model and engine is in your car to help.

Firing order is 1-3-4-2

if your car was starting up before you replaced the spark plug leads, my suggestion (as long as you put simlar plugs back in) is that the leads are around the wrong way........with the engine, if you have a 4 cyl, it does not fire 1-2-3-4, there is a particular firing order, eg 1-3-4-2, for a 4 cyl.

you did not state what vehicle you had, so i cannot tell you what the firing order is, and hence the correct position for the leads

this would be my first guess

remove the dizzy cap, crank motor over to find out the rotation of the rotor. Remove the no.1 spark plug and bring no.1 piston up to top dead centre on compression stroke, mark side of dizzy body where the end of the rotor points to, replace dizzy cap and see which lead it lines up with.
that will be your no.1 lead, find the firing order and put the leads back on the dizzy cap in the direction of the rotors rotation, run those leads to the corresponding plugs and it should start.

1-3-4-2 is the firing order.