Why is my 1990 grand am 3.2 v6 sputtering and back firing after I changed timing chain

The firing order on all 60 degree V6 engines is 1-2-3-4-5-6. In 1990 GM stroked the 2.8 L engine from to 3.1 L. It's based on the 2.8 L V-6 engine found in 80's cars like the Camaro and Beretta.

That could be the timing belt.. have you ever replaced it? (Some Cherokees use a timing chain.) If it is the belt, the more you crank it over, the more valves you can bend or break.

It sounds if the timing is out a tooth. if it run ok before the belt change that is the fault . remove the timing cover , check out timing marks by turning engine clock wise only. after fitting a new belt I all ways set tension and rotate engine twice and recheck marks , saves a lot of time if a tooth out.

For the 2000 Pontiac Grand Prix:
I do not know if you have the 3.1L V6 or the 3.8L (including Super Charger) V6; however I have included both below...

For the 3.1L V6:
Firing Order:
1-2-3-4-5-6
Cylinders:
......(back).......
'...1....3....5...'
____________
'...2....4....6...'
.......(front)
Ignition Coil Connections:
.'.5..2.'..'.3..6.'..'.4..1.'


For the 3.8L V6 including the Super Charger:
Firing Order:
1-6-5-4-3-2
Cylinders:
.....(back).......
'...2....4....6...'
____________
'...1....3....5...'
......(front)
Ignition Coil Connections:
(back)
o 6
o ---3
___
o 2
o ---5
___
o 4
o ---1
(front)

Let me know if this helped, or if you have additional information or questions. Feel Free to contact us at FixYa.com!

This question was listed under the 1990 Mitsubishi Minivan.

For the 1992 Mitsubishi Pajero V6 3.0L:

Firing Order:
1-2-3-4-5-6

Cylinders:
.....(back)
5..............6
3..............4
1..............2
.....(front)

Distributor:
....(back)
............(+)-screw
......2
1.........3
6.........4
......5
(+)-screw
....(front)

Let me know if this helped, or if you have additional information opr questions. Feel Free to contact me at FixYa.com!

I do not know if you have the 3.0L V6, 3.3L V6, 3.3L Flex-Fuel V6; or the 3.8L V6 Engines; however I have included all below:

For the 3.0L V6:
Firing Order:
1-2-3-4-5-6
Cylinders:
.....(back)
1......3.......5
2......4.......6
.....(front)
Distributor:
...(back)
......1
3..........2
5..........6
......4
...(front)

For the 3.3L AND 3.8L V6
Firing Order:
1-2-3-4-5-6
Cylinders:
.....(back)
1......3.......5
2......4.......6
....(front)
Ignition Coil:
(back)
5..1..3
2..4..6
(front)

For the 3.3L Flex-Fuel V6:
Firing Order:
1-2-3-4-5-6
Cylinders:
....(back)
1.....3......5
2.....4......6
....(front)
Ignition Coil:
(back)
6..3
4..1
5..2
(front)

For the 1996 Pontiac Grand Prix:
I do not know if you have the 3.1L V6 or the 3.4L DOHC V6; however I have included both below...

For the 3.1L V6:
Firing Order:
1-2-3-4-5-6
Cylinders:
......(back).......
|...1....3....5...|
____________
|...2....4....6...|
.......(front)
Ignition Coil Connections:
.|.5..2.|..|.3..6.|..|.4..1.|


For the 3.4L DOHC V6:
Firing Order:
1-2-3-4-5-6
Cylinders:
.....(back).......
|...1....3....5...|
____________
|...2....4....6...|
......(front)
Ignition Coil Connections:
(back)
o <---4
o <---1
___
o <---6
o <---3
___
o <---2
o <---5
(front)

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

Timing chain.

Firing order is 1-6-5-4-3-2 cyls. # 1-3-5 on drivers side front to back and cyls. # 2-4-6 passenger side front to back.

#1 cylinder on top and on compression stroke....NOT on exhaust stroke...