S2000 Under The Hood S2000 Technical and Mechanical discussions.

bent valves?

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Old Jun 16, 2016 | 02:34 PM
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Default bent valves?

I have a 2000 s2000. I have a ticking noise. And also when keeping it above 3500 RPM, check engine starts to blink and reads random multiple misfires in all cylinders. And misfires in 1,2,3 and 4 cylinder. I dont feel the misfire at all. Once i slow down check engine stops blinking and stays on. Sometimes it will actually go away all together. Replaced TCT. Still ticking. Did a compression test. I got 240, 240, 240 and 230. Im guessing timing chain?? Or maybe valves?? Any advice will help please.
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Old Jun 16, 2016 | 02:36 PM
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And also sometimes i smell fuel inside the car
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Old Jun 16, 2016 | 02:58 PM
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Your valves are good and so are your rings. If you had bad rings or a bent valve you would not have such good compression numbers.
I'll let others post what they think the problem is, I just know you don't have a bent valve.

ROD
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Old Jun 16, 2016 | 03:12 PM
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Thank you very much for that info.
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Old Jun 16, 2016 | 03:13 PM
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replaced spark plugs and coil packs? although based on the misfire in all cylinders part, I don't think that's it. maybe bad fuel rail, and hence the fuel smell?
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Old Jun 16, 2016 | 04:27 PM
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When was the last valve adjustment performed? And who did it...

If a valve adjustment doesn't seem like an issue see the misfire thread on steps on how to start diagnosing things. If you're local I'd love to help out.
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Old Jun 16, 2016 | 04:49 PM
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Stop driving the car.

A flashing CEL!?!??!?
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Old Jun 16, 2016 | 05:08 PM
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Originally Posted by Soviet
When was the last valve adjustment performed? And who did it...

If a valve adjustment doesn't seem like an issue see the misfire thread on steps on how to start diagnosing things. If you're local I'd love to help out.
Agree... check valve lash. Engine stone cold.
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Old Jun 16, 2016 | 05:15 PM
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I'm also going to go with valve adjustment here. But if this doesn't solve the problem check out this thread. It describes in great detail exactly what you're dealing with and several possible fixes/things to check.

https://www.s2ki.com/s2000/topic/659930-misfire-thread/
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Old Jun 16, 2016 | 05:20 PM
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It was done about 10000 miles ago. By a shop in YUMA az. Im currently in south CAL. I have changed the coils. And i doubt its all the injectors go bad after 3500 RPM. And freq the car isnt being driven. im looking for advice not some guy making assumptions and stating what i have already said.
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