3.0 #6 Cylinder cut out suddenly.
11-23-2014, 08:21 PM
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3.0 #6 Cylinder cut out suddenly.
Hi YotaTech. My 3.0 4runner started running poorly out of the blue a week ago. It was sounding very loud (amplified by hole ridden exhaust) and threw a lean CEL code. After some basic diagnostics I figured out my #6 cylinder was doing absolutely nothing and it made no difference whether it was plugged in or not. The wire and spark plug are good (replaced plug, tested wire) and I can see a good spark when I ground out the plug. The cylinder has 160 psi in a compression check. Only thing I can think of is fuel injector. Dunno how to test it besides the ohmeter check which was good or listening to it with a stethoscope which revealed that it sounded exactly like the others with a consistent rapid click. Seems like the injector is still most likely offender, maybe severely clogged? But I'm not really sure and would like to know definitively before I go ripping into my engine and have to pay for gaskets and crap. Anyone got any ideas/advice for me? Know how to test if the injectors are spraying anything? Anything else that could be causing the problem? Thanks!
11-24-2014, 08:24 AM
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Hey, thanks for the reply. I could see a good spark from the original plug when i grounded it out, also checked with a timing light with the spark plug in the cylinder and it was consistently firing. I replaced the plug entirely and tried with some old but working (last time they were in use) plug wires and no difference, also tried a different distributor cap. I still have the old plug and can get some pics up soon. Only thing is I kinda screwed up getting a good diagnosis from the plug cause before I figured out that a cylinder specific misfire was causing the issue I took all my plugs out and cleaned them with carb cleaner and a wire brush lol. Since then I drove maybe 10 or 15 km so you can still get a bit of an idea. The plug looks a little burnt I think. The white insulator is sorta an off-white beige color with a little brown, nothing too out of the ordinary, but I'll get a comparison between it and the other (working cylinder plugs) going. I'll get pics up in a bit and see what you think.
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