Question about 1991 Pontiac Firebird

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My 1991 firebird will not run right side spark plugs are black and the left are good. Change them at the sametime. Right side spark plug turned black without even running the car. What could be the problem? Car does not stay running.

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  • 249 Answers

Sounds like the egr is stuck open.

Posted on Jul 28, 2010

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how do you know its no spark..

Dec 22, 2013 | 1991 Pontiac Firebird

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Spark plug gap size for 1991 formula firebird


See if you still have the Vehicle Emission Control Information label (the VECI label) under the hood on some radiator support member, probably. The spark plug gap is listed on it.

Feb 08, 2013 | 1991 Pontiac Firebird

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1 tail, clearance - brown

2 left hand turn - yellow

3 right hand turn - green

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3 earth - white

4 right hand turn - green

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Feb 02, 2013 | 2004 Toyota RAV4

1 Answer

I have a 1991 pontiac firebird it was running fine i shut it off and now it wont start i have done everything i can think of but i cant figure it out im a pretty good mechanic i have been working on this...


does your ignition key have a small black chip in the key with a little metal contact on it? if it does and your no start is due to lack of fuel the factory security (V.A.T.S.) may have failed. does the fuel pump run at all when you turn the key on if your key does not have the chip in it? do you have spark at the plugs?

Mar 14, 2011 | 1991 Pontiac Firebird

1 Answer

I need a wiring diagram for the ignition control module and distributor on a 2.8 litre v6 motor


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.

Feb 07, 2011 | 1988 Pontiac Firebird

2 Answers

Missing after replacing spark plugs


What size engine? Check the gap on the plugs as well. "pregapped" is not always right

Feb 18, 2010 | 1991 Oldsmobile Cutlass Ciera

1 Answer

I need a spark plug wireing diagram for a 1997 ford f-150 4.6 liter v-8?


Sitting in the drivers seat, drivers side is the Left side, passenger side is the Right side.

From the Front of the engine going towards the rear,

Right side: 1, 2, 3, and 4

Left side: 5, 6, 7, and 8.


Front of the engine, RIGHT side coil pack. Two spark plug towers in Front.
Left side is Number 5. Right side is Number 1

Front of the engine, RIGHT side coil pack. Two spark plug towers in Rear.
Left side is Number 3. Right side is Number 6.

Front of the engine, LEFT side coil pack. Two spark plug towers in Front.
Left side is Number 8. Right side is Number 4.

Front of the engine, LEFT side coil pack. Two spark plug towers in Rear.
Left side is Number 2. Right side is Number 7.

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1 Answer

Where does the firing order start on a 1991 3.8 buick lesabre. 165432


There are six VIN numbers of engines for the 1991 Buick Lesabre, with a 3.8 Liter engine.

1.Vin B
2.Vin 3
3.Vin C
4.Vin 1
5.Vin L
6.Vin K

All have the Firing Order of 1-6-5-4-3-2

For Vin B and 3:
Hood open, looking at the engine from the front of the car. The coil pack is behind the engine, close to the firewall. (Under the windshield)
The crankshaft pulley is down on the left side.

Spark plug numbering, for the spark plugs close to the radiator side.
From Left; (Front of engine), going Right-> 1-3-5
Spark plug numbering, for spark plugs on the backside of the engine.
From Left going Right-> 2-4-6

The distributorless coil pack sits on the backside of the engine, close to the firewall.
Numbering of where to put the spark plug wires;
There are three spark plug towers close to the engine. From Left to Right -> 3-5-7
There are three spark plug towers far from the engine. From Left to Right-> 6-4-2

For Vin C, 1, L and K:

Hood open, facing the car.
The Front of the engine faces to the Right. The crankshaft pulley is down, and to the Right.

Spark plugs close to the radiator;
From Left to Right-> 6-4-2
Spark plugs close to firewall, (Below windshield)
From Left to Right-> 5-3-1

The distributorless coil pack sits on the right side, in front of the engine. (The Front of the engine is on the right side. The crankshaft pulley is on the Right side)

Starting at the ->Back and coming Forward. (To the Front of the car)
On the Left side of the Distributorless Coil Pack, it is -> 4-2-6
On the Right side it is -> 1-5-3

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2 Answers

2001 Firebird V6 Sparkplug Diagram


The Firing Order is 1-6-5-4-3-2
When you take a wire off of the spark plug of a running engine, there is supposed to be an arc.

Remove and examine the spark plugs. See what condition they're in. It may be way past time for their replacement. Also check the spark plug wires. These are often neglected, and break down after time.

Jun 10, 2009 | 2001 Pontiac Firebird

3 Answers

How do you change the spark plugs


The only thing you need is the appropriate plug socket extension bar and ratchet handle.Undo and remove/replace one plug at a time so you dont get the h/t leads mixed up Also when removing the h/t leads remove with a twisting motion they will be tight but keep twisting as you pull and they will come off.Be as gentle as possible with the h/t leads as they are quite fragile.When you buy the plugs ask the store to make sure the spark plug gap is right for your vehicle as there are some variations.Good luck and good on ya for not being ripped off and doing it yourself!

Oct 22, 2008 | 2003 Kia Sorento

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