Question about 1999 Chevrolet Tahoe

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Keep fouling out the #6 cylinder plug, and a loss of power in a 99 tahoe.

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You need a scanner to look at fuel and spark parameters. Bad coil or injector Take it for a drive while someone scans it

Posted on Sep 26, 2009

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1 Answer

Rear spark plug bank is fouled. The 3 in front are fine. What cold be the problem?


I am assuming it is oil fouled rather than fuel fouled. Oil fouling is usually due to valve stem seal leakage. Most engines have the oil return on the cylinder head at the rear. When the engine is shut off, some oil pools at the rear of the head. If the valve guide seals are worn, then the oil will leak around the stem of the #4 valve and eventually foul the plug. If there are no real issues with the engine other than this one, it is usually best to keep a clean plug or two available and swap out the plug periodically when fouling is detected. Then clean the fouled one and keep for reuse later. If it is happening too often, getting the cylinder head reconditioned is a good idea.

Oct 09, 2015 | 2006 Acura MDX Touring

2 Answers

Will oil in spark plug compartment cause slow take off in acceleration.


Oil in the cylinder(s) can foul plugs, resulting in misfiring and thus loss of power. Another possibility is that the oil in the cylinder(s) comes from oil leaking into the cylinders. If these leaks are of sufficient size, they will reduce compression in the cylinder, and thus reduced power upon the cylinder firing.

Aug 16, 2014 | 1991 Honda Accord

1 Answer

Misfire on #4 cylinder


bad fuel injector on cylinder

Sep 03, 2012 | 1999 Chevrolet Tahoe

1 Answer

1995 chevy blazer fouling on number 2 cylinder


with this issue , fouling can mean many things, i,ll assume, & i don,t like assuing at all, ? i,ll assume you mean missfiring inderperforming two different issues, two answers, (1) missfiring ,ok change all plugs and remove and overhaul number two injector, replace it,, (2) fouling,? under performing, this can have a few causes i,ll list all, pressure loss in cylinder due to either worn piston rings or valve seatings, or head gasket,?(a) piston rings, luckily this is probably not the problem as usually all 6 cylinders would be effected, (b) valve seatings , hope its not this as it,s a major opperation involving removing the cylinder head an totally reconditoning it, all valves cleaning and reseating, replacing vavle seals , new head gasket ,inlet manifold gaket , exhaust manifold gasket, a good mechanic can get away with changing only the head gasket, but that ain.t you,unfortunatly, so hope its (a) peter.

Sep 01, 2012 | Chevrolet Spark Cars & Trucks

1 Answer

1999 Ford ZX2 Sport 2.0l DOHC non-turbo (manufactured 4/99, 152,000 miles), serpentine drive belt went yesterday, shredded, tried to limp home, but car died (still had enough electrical power to drive the...


Bob
From what you have said I would try a new set of spark plugs. Why I am saying this is because when you lost your belt you ran off the power in the battery until there wasn't enough power to run the ignition system properly which caused you spark plugs to foul out. When your plugs foul out and get gas soaked they will not fire as good as they should.When you change your plugs turn the motor over with the plugs out to clear the cylinders. Make sure to use anti-seize on the threads of your new plugs to keep them from corroding to the cylinder head this will make it easier to get the plugs out the next time they need to be changed without damaging the threads in the cylinder head.
Thanks for using FixYa hope this answers your question

Jul 15, 2011 | 1999 Ford Escort

3 Answers

My 95 tahoe seems to be burning oil. #3 cylinder had a fouled plug. i fixed that but it smokes when i accelerate hard & i dont know where the oil keeps going.


Do a cylinder leak down test

It will possibly tell you if the rings are an issue

The other problem would be valve seals

Apr 25, 2011 | 1995 Chevrolet Tahoe

1 Answer

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


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.

Jul 04, 2010 | 2004 Chevrolet Tahoe

1 Answer

My 97 tahoe only running on 6 cylinders


If compression test is good is either no spark, bad coil or wire, or no fuel, bad fuel injector. Need to clarify which is not functioning properly.

Jun 23, 2010 | 1997 Chevrolet Tahoe

2 Answers

What causes a misfire on a 99 pontiac grand am if spark plugs or good and the car does not have wires


here are the common causes of a missfire, defective ignition coil or ignition coil wiring for that cylinder, defective fuel injector, defective powertrain control module, intake manifold vacuum leak, low cylinder compression.

Aug 24, 2009 | 1999 Pontiac Grand Am GT

1 Answer

Low compression on number 6 cylinder of 1996 ford explorer 4.0


check, 1. spark plug for firing(replacing plug is a cheap fix)
2.#6 spark plug wire for proper strong voltage.
3. distributor cap #6 TERMINAL, (replace cap for another cheap fix)
remember trouble problem may be intermittent, so it would be beneficial to use "CHEAP FIX" solution first. GOOD LUCK. KEEP ME INFORMED. THANKS

Feb 28, 2009 | 1996 Ford Explorer

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