Question about 2001 Buick LeSabre

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#1 plug keepes missfiring,even after changing #1 plug

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I also had that problem w my chavy venture till i replaced the feuld injector

Posted on Sep 12, 2010

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Posted on Jan 02, 2017

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MrBirdMan64
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SOURCE: 2.5 liter cougar has #1

Could be a bad ignition coil.

Posted on Mar 28, 2010

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09 accent cyl 4 missfire, plug injetor coil all ok cyl comp test all within spec. changed pcm old one stopped workin alltogether. all no change,intermittent missfire


SWAP COIL LIKE FROM CYL NUMBER 1 TO 4 AND ROAD TEST UNDER LOADS IF CHANGE THE MISS TO CYL NUMBER 1 NEED A COIL OR BAD PLUG AT CYL NUMBER 4

Sep 02, 2014 | Cars & Trucks

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Firing order for a 1.9L saturn sl-1


The firing order is 4 1 2 3 it's from left to right looking at the ignition coil

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What does the code "misfire on bank 1 mean" on a diagnostic code for a 2000 lincoln navigator mean?


Do you mean "missfire on cylinder 1", code P0301? If so, that means that the computer has detected incomplete combustion in the #1 cylinder, which would be the front passenger side cylinder. There are many potential causes to a cylinder missfire ranging from worn / bad ignition components, clogged / bad fuel injector or even internal engine damage.

However the most common cause, especially on ford vehicles is a bad ignition coil. When trying to determine the cause of a missfire on an engine such as the one in your Navigator i start with removing the plug and checking for carbon tracing, excessive plug gap or contaminants on the plug. If that checks out ok i then swap the ignition coil from the missfiring cylinder to one that isn't. For example, I would swap the ignition coil from #1 to #2 and clear the codes. Then drive around until the light comes back. If it comes back with a missfire on cylinder #2 then you know the cause is the ignition coil and it has to be replaced. If it doesn't then it is something else causing the missfire which will require a bit more diagnostics.

How many miles are on your Navigator? Have the plugs ever been replaced? If you have close to 100k it would be a good idea to replace all of the plugs. Be careful when removing the plugs, it's not difficult to pull the threads right out of the head when removing the plug.

Jun 05, 2010 | 2000 Lincoln Navigator

3 Answers

My S-10 keeps giving a P0300 dtc. Can't figure out what is setting this code. Usually misfires at idle. Any suggestions?


if u change plug wires ,coils ,plugs and still having problems check the injecter with a pulse light the one that dont pulse the pcm is bad are broke wire if all of them are pulseing then change the injecter.had the same problem on a 2000 s10 2.2

Apr 27, 2010 | 2000 Chevrolet S-10

1 Answer

P0301


try changing (1) the HT lead, you could substitute this with the old one, (2) the spark plug, again substitute this with one of the old ones, even tho they are new they can still be faulty,

Mar 14, 2010 | 1999 Ford Windstar

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Engine misfire from 1 & 4 changed spark


Did you use the right plugs?
Pull them all out, inspec, them for phisical damage.
Son put theplug for the 2.4 instead of the plugs for the 2.2 in his cavalier and he only clipped one with a piston (Missfire)
Do you have the fireing order correct?

Feb 13, 2010 | 2001 Kia Rio

1 Answer

1999 cadillac escalade missfiring cylinder #6


do you have a seperate coil for each spark plug check ur coil for number 6 or fuel injector

Feb 05, 2010 | 1999 Cadillac Escalade

1 Answer

I have a 2000 gmc sierra 5.3 with a number 6 cylinder missfire. things i have done so far: 1. compression test on number 6 tested fine,as well as the rest of the cylinders 2. leak down test. Held...


I would check the valves for number 6. If one or both are burned, stuck or out of adjustment it would cause your problem. If a cam lobe for that cylinder is burned or badly worn it could be the culprit.

Jan 10, 2010 | 2000 GMC New Sierra 1500

1 Answer

Hi all, my 99 sub.350,300k,missfire #2


Have you checked the distr cap for cracks??

If plug is oily looking on brand new plug I would suspect worn rings, which would also explain the high PSI. (Motor job in the wind) Especially for 300K.



Dec 03, 2009 | 1999 GMC Suburban

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