Diagram of where touter must site when firing on number 1 piston of a jetta 3 csl fuelinjection 1996 1600cc

What year is the vehicle? Mitsubishi used two different systems on that engine. Before 2006 they used a Fuel Injection Pump and after 2006 they used a Common Rail system.
An injection pump is a mechanical setup that is driven by the timing belt to make sure it matches the engine speed when driving.
A common rail system uses an electronic signal to fire each injector at the correct moment from a shared fuel supply rail on the engine.
In general the injector firing order needs to match the mechanical firing order of the engine so the fuel is injected into the correct cylinder at the correct moment. The Firing order is 1, 3, 4, 2. Number 1 is nearest the engine belts and pulleys.

for unleaded fuel around 6? on idle ,this vehicle has a distributor as such and its possible to adjust this by the 10mm headed bolts on the housing any higher than 8? and the engine will pink .

when I had my Jetta I changed the distributor. if you didn't pull it out and only turned it there is either 2 marks or 2 metal rods that stick out the side that the bolt goes through the center

Hi Alex, The firing order is 1-3-4-2. When fitting the injector pump I hope you noticed the match marks for timing. When fitted and aligned the engine will be at TDC firing on one. To identify # 1 on the pump, connect the fuel supply and bleed air from the system and rotate the engine one and three quarter revolutions by hand, having someone watch which outlet ejects fuel when passing TDC completing the second rotation. That will indicate number one piston. Follow the firing order for the remaining three. Regards John

My jetta 3 1.8 engine full enjecter started by not starting at all then I removed the medsensor it started I put it back in the engine went off bought a new sensor still did the same thing then I removed the one that detects water it started put it back in engine turns off then I removed the the throat sensor it did the same thing what my be the problem

Firing order is 1-4-3-2

cylinders are numbered:

Front
3 1
4 2
Rear

1.****/air in,piston going down
3.squeeze/compresion,piston going up
4.bang/plugs fire,pistons going down
2.blow/exhaust.pistons going up
is that understandable??

1 , 3, 4, 2 1 is at end of engine opposite to transmission, set engine to top dead centre using timing mark if you can see them, or take plugs out rotate engine and watch for no 1 piston coming up to top

1-3-4-2 Distributor rotates clockwise.

Also can review this information: Jetta Tech

Good luck, and remember rated this help.

the firing order is
1-6-5-4-3-2