Intermittent small pop at idle
Noticed it about a week ago. When idling every now and then I would notice a small pop. I'm not sure where it originates from but I can feel it, as well as hear it. I think the idle sort of hiccups for a millisecond when it happens. If happens about twice in a minute or so.
The car is an AP1 but with Ap2 retainers and the valves were adjusted ~15k miles ago. New NGK plugs 15k miles ago as well, and no coil packs/fuel injectors 25k miles ago. There is no CEL and the car runs great besides this small pop. Anyone run across this issue? |
Aftermarket exhaust? Maybe your valve adjustment was too tight. Aside from that it might be slightly clogged fuel injector?
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The car has stock exhaust. I can swap the injectors with a set that has been sitting for a couple years, idk how well they flow though.
I'm assuming the small pop is a misfire? |
Does it sound even remotely like this? https://www.youtube.com/watch?v=0Uvr...ature=youtu.be
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Originally Posted by HarryD
(Post 24169818)
Does it sound even remotely like this? https://www.youtube.com/watch?v=0Uvr...ature=youtu.be
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Plug in an obd scanner and check the voltages of your primary O2 sensor, might be going bad. Easy to check it and can save your Catalytic converter.
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That or failing coils.
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My car had the same small pops that were fairly infrequent. I bought some used injectors and put them in for testing purposes and it solved the problem.....that was 8 years ago and never heard a pop since. I think my test is complete.
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I fixed the problem. Short story: Coil pack on cylinder 2 was bad.
Long story: On the way home today the car finally threw a check engine light.The light was flashing and the car was running really bad (low power, hesitation, loud engine). I read the code and it was a misfire on cylinder 2. I just replaced the easiest thing possible, which was swapping the coil with a set I had laying around, and that fixed it. Car runs like butter now. Only thing is now the exhaust smells a lot more gassy, possibly running rich. Thanks for all the suggestions and inputs. Glad it was something simple. |
I see you put new coil packs on 25K ago? So you are thinking that a coil pack went bad in 25K?
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