1999 JGC will not start

The firing order for the 2007 Suzuki XL7 equipped with the 3.6L V6 engine is 1-2-3-4-5-6. In V6 engines, the cylinders are typically numbered consecutively from front to rear on each bank. Therefore, the firing order indicates the sequence in which the spark plugs fire in each bank of cylinders.

3.8L (VIN K) Engine Firing Order: 1-6-5-4-3-2 Distributorless ignition system. Fig. 5.7L (VIN G) Engine Firing Order: 1-8-7-2-6-5-4-3 Distributorless ignition system (one coil on each cylinder)

Camaro, Firebird, 1999 - 2002 Firing Orders Repair Guide

Pictures as well

https://www.google.com/search?q=1999+pontiac+firebird+v6+firing+order&rlz=1C1QJDB_enCA643CA644&sxsrf=AOaemvIyF713djyRLwr-4J3UsfO1SORgWQ:1640798385309&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjLv52nwon1AhUUXM0KHZtoDrgQ_AUoAXoECAEQAw&biw=1920&bih=937&dpr=1

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The first step is to determine if it's a spark, fuel, or compression problem. Here's a quick way to find out which of the three is missing. Remove a plug wire, insert a Phillips screwdriver or spare plug piece of bare wire into the plug wire boot and place the end near the engine block (do not hold the plug wire while cranking the engine unless you want a shocking experience). If there's a spark when the engine is cranked, it has ignition. The problem is either fuel or compression. If the engine has an overhead cam with a timing belt, loosen the cover over the timing belt and check the belt. If the belt is okay, the problem is no fuel. Listen for the electric fuel pump in the fuel tank to make a buzzing noise when the ignition is turned on (you may have to open the gas cap to hear it). You won't hear anything if the pump has died. Diagnostics can now be focused on the fuel pump circuit to determine if the pump, relay or wiring is causing the no start. If the relay has voltage but the pump isn't running, you'll probably have to drop the fuel tank to check the wiring connector at the pump. If the problem is no spark, anything in the ignition circuit that creates the spark may be at fault. Use your AutoTap Express DIY to look for an RPM signal from the Crankshaft Position sensor while cranking the engine. A bad Crankshaft Position sensor is a common cause of no starts. The signal from this sensor goes to the PCM or ignition module that switches the ignition coil(s) on and off. If you have an RPM signal, a bad ignition module or PCM may not be switching the coil(s) on and off. Using a voltmeter, check for voltage at the coils with the key on and while cranking the engine. The voltage should be switching on and off. In ignition systems with a single coil and distributor, a bad coil or a cracked distributor cap or rotor can prevent the spark plugs from firing. On multi-coil, distributorless ignition systems and coil-on-plug systems; one coil failure may cause an engine to misfire, but it won't prevent it from starting. What's causing the no-start? All engines require three things to start and run: spark, fuel and compression. If any one of these isn't there, you aren't going anywhere

a haynes manual from a parts place will show you--or chec the condition of each plug wire-if one looks bad or falls apart--probly need to get all new wires /plugs

Here ya go...found the block for the reply....

3.8L engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System

Several VIN engine there, check this diagrams...




Fig. 3.1L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system




Fig. 3.4L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system




Fig. 3.8L (VIN 1) Engine Firing order: 1-6-5-4-3-2 Distributorless ignition system




Fig. 3.8L (VIN K) Engine Firing order: 1-6-5-4-3-2 Distributorless ignition system




Fig. 3.4L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system

Hope helps (remember rated this).

To avoid confusion, remove and tag the spark plug wires one at a time, for replacement.

The 3.5L (VIN H) engine's unique ignition system has the ignition coils directly over each plug. No spark plug wires are used.
If a coil is replaced on any of the 3.1L, 3.4L or 3.8L engines, it may not be numbered, as is the factory coil. For this reason it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes in your guide to reflect how your engine is wired.



Fig. 3.1L (VIN M) engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System



Fig. 3.4L (VIN X) engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System



Fig. 3.4L (VIN E) engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System



Fig. 3.5L (VIN H) engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System



Fig. 3.8L (VIN 1) engine Firing order: 1-6-5-4-3-2 Distributorless Ignition System



Fig. 3.8L (VIN K) engine Firing order: 1-6-5-4-3-2 Distributorless Ignition System

The firing order for the 3.1L VIN M, 3.4L VIN E, 3.4L VIN X and 3.5L VIN H engines is 1-2-3-4-5-6. The right bank cylinders are on the cowl side (rear) of the engine compartment and are numbered 1,3,5, left bank cylinders on the front side of the vehicle, are numbered 2,4,6.
The firing order for the 3.8L VIN K and 3.8L VIN 1 engines is 1-6-5-4-3-2. Starting at the front of the engine, cylinders in the left bank are numbered 1,3,5 and cylinders in the right bank are numbered 2,4,6

Hope helped (remember rated this help) Good luck.

No 3.1L but choose the one that is yours.....


2.5L Engine Firing order: 1-3-4-2 Distributor rotation: clockwise



1999-04 4.0L Engine Firing order: 1-5-3-6-2-4 Distributorless ignition system


4.7L Engine Firing order: 1-8-4-3-6-5-7-2 Distributorless ignition


5.7L Engine Firing order: 1-8-4-3-6-5-7-2 Distributorless ignition

2003 Chevrolet Malibu 3.1L SFI OHV 6cyl
Spark Plug Wires - Removal & Installation

3.5L Engine

1. Before servicing the vehicle, refer to the Precautions Section.
   NOTE Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.
2. Remove the intake manifold cover, if required.
3. Disconnect the left side spark plug wires from the spark plugs.
4. Disconnect the left side spark plug wires from the ignition coil.
5. Remove the spark plug wire clips from the Manifold Absolute Pressure (MAP) sensor bracket and the heater inlet and outlet pipe tab.
6. Remove the spark plug wire assembly.
7. If replacing only one plug wire, open the retaining clips and remove the appropriate spark plug wire.
8. Disconnect the right side spark plug wires from the spark plugs.
9. Disconnect the right side spark plugs from the ignition coils.
10. Remove the spark plug wire assembly.
11. If replacing only one plug wire, open the retaining clip and remove the appropriate spark plug wire.

To install:

1. Install the spark plug wire assembly.
2. Connect the right side spark plugs to the ignition coils.
3. Connect the right side spark plug wires to the spark plugs.
4. If replacing only one plug wire, open the retaining clip and install the appropriate spark plug wire.
5. Install the spark plug wire assembly.
6. Connect the left side spark plug wires to the spark plugs.
7. Connect the left side spark plug wires to the ignition coil.
8. Install the spark plug wire clips to the MAP sensor bracket and the heater inlet and outlet pipe tab.
9. If replacing only one plug wire, open the retaining clips and install the appropriate spark plug wire.
10. Install the intake manifold cover, if required.

Fig. 2.2L Engine Firing Order: 1-3-4-2 Distributorless ignition system



Fig. 3.1L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system



Fig. 3.5L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system



Fig. 2.4L Engine Firing order: 1-3-4-2 Distributorless ignition system



Fig. 3.1L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system



Fig. 2.2L Engine Firing Order: 1-3-4-2 Distributorless ignition system


Fig. 3.5L & 3.9L Engines Firing order: 1-2-3-4-5-6 Distributorless ignition system


I really hope help you with this (remember rated this help) Good luck.

The 3.5L (VIN H) engine's unique ignition system has the ignition coils directly over each plug. No spark plug wires are used.




3.5L (VIN H) engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System



The firing order for the 3.1L VIN M, 3.4L VIN E, 3.4L VIN X and 3.5L VIN H engines is 1-2-3-4-5-6. The right bank cylinders are on the cowl side (rear) of the engine compartment and are numbered 1,3,5, left bank cylinders on the front side of the vehicle, are numbered 2,4,6.




3.1L (VIN M) engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System





3.4L (VIN X) engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System





3.4L (VIN E) engine Firing order: 1-2-3-4-5-6 Distributorless Ignition System




The firing order for the 3.8L VIN K and 3.8L VIN 1 engines is 1-6-5-4-3-2. Starting at the front of the engine, cylinders in the left bank are numbered 1,3,5 and cylinders in the right bank are numbered 2,4,6.






3.8L (VIN 1) engine Firing order: 1-6-5-4-3-2 Distributorless Ignition System









3.8L (VIN K) engine Firing order: 1-6-5-4-3-2 Distributorless Ignition System


I hope help you with this, remember rated this help. Good luck.