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theres no distributor and the firing order for your 3.8 is 1-6-5-4-3-2-the following link shows the coil pack Buick General Motor 3800 V6 Engine Firing Order DIS IDI ignition timing
3.8 Buick Engine Coil Pack Firing Order Spark Plug Wire Location
Which way do the spark plug wires go on & what cylinder is what?
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For the Buick V6 231 3.8 liter turbocharged engine:
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Answers!
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Firing order:
1 - 6 - 5 - 4 - 3 - 2.
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Spark plug wire location on coil pack:
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Closest to the back of the car, left to right: 1 - 5 - 3.
Closest to the front of the car, left to right: 4 - 2 - 6.
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Spark plug wire location on engine:
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drivers side, front to back of car: 1 - 3 - 5.
passenger side, front to back of car: 2 - 4 - 6.
.----and this link shows the coil pack to cylinders
. 3 8 Buick Turbo Engine Coil Pack Firing Order Spark Plug Wire Location
The fans are controlled by the ECM and it uses the ECT sensor for temperature sensing, so if the check engine light isn't on the sensor is not the problem. You need to have an active test run on the fan system to see what code is returned. Have you tried powering up the fans at the relay?
The coolant temperature sensor is a thermistor mounted in the engine
coolant stream. A thermistor is an electrical device that varies its
resistance in relation to changes in temperature.
For 2.5L engines, the coolant temperature sensor is located on the left side of the cylinder head.
For
MFI engines, the coolant temperature sensor is located on the intake
manifold water jacket or near (or on) the thermostat housing.
Fig. 1: Engine Coolant Temperature (ECT) sensor and connector
If you mean the engine temperature sending unit, it should be on the cylinder head and has a single wire attached to it. It looks a little like a miniature spark plug with a black insulation. To simplify your search, buy the new one and look for the same thing on the engine.
Remove and inspect the spark plugs for heavy deposits or glazed-looking interior insulators. Make sure the plugs are the proper type for this engine. Heavy carbon build-up in the cylinder heads will cause pinging. If the ignition system is too advanced, it will also cause problems. Try a different brand of fuel. High engine temperatures can do the same (caused by poor cooling system or lean fuel/air mixture). If the check engine light is on, take the car to Autozone or a similar business that offers a free scan of the computer. This may provide additional clues. Hope some of this helps!
Firing Order:
1-2-3-4-5-6
Cylinders:
1--3--5
2--4--6
(front of veh)
Distributor Connections:
1-4 6-3 2-5
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Cylinder number 5 is misfiring. Check spark plug, spark plug wire and ignition coil for the number 5 cylinder. The number 5 cylinder is the closest to the front of the car on the drivers side. With engine running in dark (at night) take a spray bottle of water and lightly mist spark plug wires and coil and look for arcing. Autozone will test coil for free.
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