Question about 1999 Chevrolet Suburban

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1999 Chev Suburban 110K miles well mantained. It started with a check engine light, misfire, code computer indicated cyl. #5. Checked plug, compression, wires, cap...all OK. Switched wires no change. Found on Chev a recall for bum injectors, the fix was a strong cleaner solution, if that fails replace injectors with a different type(kit from Chev). I did the cleaning thing no change. Brought a injector kit, installed it and still have the same misfire on #5. Any ideas? This is getting expensive! cruzinsaab@yahoo.com

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Had same problem with mine. Misfiring turned to burned plugs. Try replacing distributor cap with high performance replacement .

Posted on Feb 07, 2013

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My 99 Suburban does this when I pull a horse trailer and drive over 55MPH. It will go out when I unhook the trailer and drive it around a bit. A friend told me the same light has been on in his Chevy pickup (about the same year) more than off. He has ignored it for years and no problems. Another friend who is a mechanic, (albeit a Ford guy) says the joke around his shop is that it's really the "engine ready light"! If you've had everything checked out and all you get is the misfire reading (same as mine) then get a sticker to place over the offensive light and enjoy everything else about the great vehicle you have- that's what I do!

Posted on Jun 17, 2011

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Check valves on the cylinder but if that doesn't fix the problem you might have to have them re-drill that cyclinder . Could also be the connection rod or uneven piston wear. Get Valvoline to repair damage cylinder walls

Posted on Apr 16, 2009

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