I need a diagram for a 1988 toyoto spark plug wiring 3 liter engine v6. I think I might have crossed one ,because now it want start.thank you. Betty

Here is the firing order and spark plug wire routing diagram for a 2006 Chevy Impala LT 3.9 V6:
Firing order: 1-2-3-4-5-6
Spark plug wire routing (starting from the driver's side):

• Cylinder 1: connect to the coil tower closest to the driver's side headlight
• Cylinder 3: connect to the coil tower next to cylinder 1
• Cylinder 5: connect to the coil tower next to cylinder 3
• Cylinder 2: connect to the coil tower closest to the passenger side headlight
• Cylinder 4: connect to the coil tower next to cylinder 2
• Cylinder 6: connect to the coil tower next to cylinder 4

Note: Make sure to route the wires properly to avoid cross-firing.

If I remember correctly the wires must be clipped into the distributer cap. Possibly this was not done or the old wires were reused and damaged while removing. The wire end needs to be squeezed together with pliers to remove. The wire ends pushed down into the cap is what the rotor contacts with and makes for spark to spark plugs. Make sure wires are in proper firing order which would be 1-3-4-2 with engine cylinder left to right 1-2-3-4. So go back into your engine compartment and double check what was done, I think you will find your problem. GOOD LUCK FRIEND.

Engine Coil Pack
5 6 / #4 / / #3 / / #5 /
3 4 / #1 / / #6 / / #2 /
1 2
Front Ignition Wires on Coils
#1 #4 #6 #3 #2 #5
' ' ' ' ' '
O O O O O O

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

the cap should be marked on a vortec 4.3 liter. the left side of engine is from front #1 #3 and #5 cylinders. the right side from front is #2 #4 and #6.

First thing is to verify everything you did!!!!! verify wires are on correct plug and coil tower using a diagram for your engine. Next look for a vacuum hose you knocked off or forgot to put back on. My money is on a crossed up wire! good luck!!

OKAY STANDING IN FRONT OF ENGINE ON LEFT SIDE CYLINDERS FACING YOU IS 1 3 5 ON RIGHT SIDE DRIVER SIDE CYLINDERS FACING YOU IS 2 4 6 LOOKING AT DISTRIBUTOR CAP NUMBER 1 SPARK PLUG ON CAP IN THE 9 OCLOCK POSITION YOUR NUMBER 5 SPARK PLUG ON DISTRIBUTOR CAP IN 6 OCLOCK POSITION .STARTING AT NUMBER 1 SPARK PLUG ON CAP COUNTING CLOCKWISE COUNTING 1 2 3 4 5 6 THATS YOUR SPARK PLUGS WIRES ON CAP TO ENGINE PLUGS. 6 PLUG WIRE ON CAP IS AT 7 OCLOCK POSITION.

http://autorepair.about.com/od/enginefiringorders1/Engine_Firing_Orders.htm

Since you didn't state whether it is a V6 or V8, I'll give you both.

V6 -4.3Liter
Firing Order is 1-6-5-4-3-2
Distributor rotor turns Clockwise
Number 1 spark plug tower on distributor cap, faces the front of the engine.

->Drivers side, spark plug order in engine, starting from the Front going back:
1-3-5
->Passenger side, spark plug order in engine,
starting from the Front going back:
2-4-6

If it's Electronic, the distributor cap has a Left side, (Drivers side), and a Right side, (Passenger side)
Starting from the Front, going back on the Left side,
3-1-5
Starting from the Front going back on the Right side,
2-4-6

V8-5.0, 5.7, and 7.4Liter
Firing Order is 1-8-4-3-6-5-7-2
Distributor rotor turns Clockwise
Number 1 spark plug tower on distributor cap,
faces Front, towards the Drivers side.

Electronic distributor cap has two sides. Drivers, (Left), side and Passenger, (Right), side.
Starting from Front going back on Drivers side,
1-7-3-5
Starting from Front going back on Passenger side,
8-2-4-6

Spark plug order in engine, starting from Front going back, Drivers side:
1-3-5-7
Spark plug order in engine, starting from Front going back, Passenger side:
2-4-6-8

3.9L V6 Engine. Engine Firing Order: 1-6-5-4-3-2. Distributor Rotation: Clockwise.............did i guess the right motor? let me know/rate me

1991-1994 2.9L and 3.0L Engines Firing Order 1-4-2-5-3-6 1995 And Later 3.0L V-6 With DIS Ignition System Firing Order 1-4-2-5-3-6
4.0L Engines Firing Order: 1-4-2-5-3-6 DIS Ignition System