Question about 2004 Chevrolet Tahoe

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2004 Chev Tahoe: Cyliner #3 not firing. Changed spark plug and wire. Worked for a short while then stopped firing again. Help please!

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The ignition coil may be what is killing the plug. Since yo have replaced plug and wire and it seemed to do good, the only other option is the coil for that cylinder is defective and causing the plug to foul. This engine if not mistaken has the COP coil over plug on each cylinder.

Posted on Jul 04, 2010

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4 Answers

99 chev. tahoe changed plugs and now im not getting fire to the number 1 plug whats wrong


Loretta,, Occasionally, a spark plug is "bad" right out of the box. But a single new plug and install it in the #1 cylinder. Also, on a 15 year old vehicle, it is likely that the spark plug wire wa damaged removing it in order to replace the plug. Good Luck.

Nov 29, 2014 | 1999 Chevrolet Tahoe

1 Answer

Spark plug wiring diagram for 05 tahoe


Greg Bernett 2821 Solutions February 14, 2010
You didn't post your engine size so please pick the applicable diagram:


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1996-98 4.3L Engines Firing Order: 1-6-5-4-3-2Distributor Rotation: Clockwise


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1996-98 5.0L, 5.7L and 7.4L Engines Firing Order: 1-8-4-3-6-5-7-2Distributor Rotation: Clockwise



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4.3L Engines Firing order: 1-6-5-4-3-2 Distributor rotation: Clockwise


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4.8L, 5.3L and 6.0L Engines Firing order: 1-8-7-2-6-5-4-3 Distributorless ignition system (one coil on each cylinder)


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5.0L, 5.7L and 7.4L Engines Firing order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

Source: spark plug wiring diagram for 98 tahoe

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    ledsled378 2926 Solutions July 24, 2010

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Source: Need diagram for spark plug wiring for 1997 Chevy

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    Dennis Weid. 44272 Solutions September 16, 2008

This was all I could come with, hope it helps.



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Feb 27, 2013 | 1998 Chevrolet Tahoe

1 Answer

#3 cylinder not firing. changed sparkplug. as i accelerate the problem (shaking) seems to inprove. when going slow i have a bad shake in the trailblazer


It could be the spark plug wire, or the coil. 2004 model you should have coil over plug (C.O.P) setup. Also check for any signs for arcing around the spark plug boot area and around the coil. Any white or gray lines on the boot area or coil is an indication of arcing. If arcing is happening, the current will take a short cut to ground instead of jumping the gap at your spark plug, thus giving you a "no fire" situation. I also ways recommend replacing spark plugs in a set along with new wires. I don't recommend just changing one.

Sep 24, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Engine light on. went to auto parts store, they diagnosed number 2 or 3 cylinder not firing. prior to this i changed plugs and wires. then i changed the coil. the engine light went off and the gas economy...


Hello mikew564.The first diagnosis was number 2 or 3 cylinder not firing. Once you changed the coil, the check engine light went off. When the light came back on again, did you get it diagnosed again to find out if the problem was the same?... 2 or 3 cylinder not firing????

First of all, there is NO extra wire/ground on the coil/ignition wiring (see images below). The spark plugs and ignition plug wiring can be checked for arcing, corrosion, resistance and can be checked for cracks in the insulators or worn electrodes (and spark gap) by a competent mechanic.
If you are having the same issue (2 - 3 misfire), there are several techniques for eliminating the plug wires or spark plugs. Spray water on the plug wires to see if they are arcing. Swap plugs from cylinders 2 & 3 with cylinders 1 & 4. If you still have a 2-3 misfire, check/inspect/examine the coil connector pins & coil harness to the coil(s) themselves.

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Aug 27, 2011 | 2004 Hyundai Elantra

1 Answer

Not firing #5 cylinder,have spark


how long since spark plugs have been changed,should be done at 20,000km,have had similar problem on Chev in Australia,could also be petrol injector if it is injected.

Jun 15, 2010 | 1997 Chevrolet Tahoe

2 Answers

Random misfire on all cyliner a po300 code pops up in the scanner...


It sounds like the coil is breaking down or the cam sensor may be at fault for the misfiring. Use an inline tester and connect from the coil tower to the spark plug wire to check for a good steady fire. Do this on all coil wires to spark plugs. The best time to do this is at night so you can see it fire. You may want to remove the spark plugs and inspect them for a fouling condition. If all is well then look at the cam sensor for the problem. Hope this will help you.

May 20, 2010 | Cars & Trucks

3 Answers

Engine light keeps comeing on mecanic change o2 senser worked for half hour came back on cods keep saying its miss fireing have had this problem for a month know


Start Small work to Big = Saved Money!
The Code(s) should be telling the specific cylinder(s) that are misfiring. Do you know waht the code is?
Target those cylinders 1st before testing the unaffected cylinders.
The following should isolate the problem(s).
1. Spark plugs - take out-reconnect back to wires and test spark plugs for getting sparks. If none: Don't replace them yet. GO TO 2. If the spark plugs are worn, dirty them replace them.
2. Remove spark plugs form end of ignition wires and test for spark from the wire. If none: Don't replace them yet. GO TO 3.
3. Remove the wires from the coil connection and test the coil for spark for each cylinder. If none: Don't replace it yet.
4. Test each spark plug and wires this way.
5. Coil Packs normally provide fire for 2-cylinders at the same time. The two are paired across from one another.
6. Test the coil for fire, amount of fire and if there is both cyclinders firing.
Misfire and the O2 Sensor got replaced??
Good Luck and get back with me if you need additional help or if this solved the problem.

Nov 20, 2009 | 2004 Dodge Intrepid

1 Answer

2004 ford taurus is running horrible


If you didn't change one spark plug wire at a time then you may have your firing order off...

Please pick your motor...front or rear wheel drive...


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3.0L (VIN U) engine Firing order: 1–4–2–5–3–6 Distributorless ignition system


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3.0L (VIN S) engine Firing order: 1–4–2–5–3–6 Distributorless ignition system

Oct 11, 2009 | 2004 Ford Taurus

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