Whats that sound?

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09-25-2007, 09:53 PM

mazda/nissan

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Whats that sound?

Is it knock or clicking valves? ( i think knock)

http://www.youtube.com/watch?v=qhjL5...elated&search=

09-25-2007, 10:16 PM

cjernigan

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It doesn't help that he was idling at 500 RPM and less. That is definitely not lifter/valve noise. The whole damn motor is shaking, i've seen cars do that when it doesn't have enough timing in idle and it's running too rich.

09-25-2007, 10:18 PM

mazda/nissan

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my motor shakes, but its only when the rpm's fluctuate due to intake leaks

09-25-2007, 10:20 PM

mazda/nissan

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well this one sounds like a party clicker

http://youtube.com/watch?v=Q7iuOHe0u...elated&search=

ps
i think this guy and his camera are :gay:

09-25-2007, 10:31 PM

Braineack

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its running on 3 clyinders.

09-26-2007, 12:25 AM

miataspeed1point6

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Sounds like my KA24DE did just before it broke a rod at 237,XXX. I really hated that car.

09-26-2007, 01:24 AM

patsmx5

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That's not a tap or a knock. It sounds like it's running on 3 cylinders to me. I would pull all the sparkplugs and have a look at them. Make sure all 4 cylinders are getting fuel/spark. Run a compression test and leakdosn test. That sounds like a stuck valve to me. My friends nissan hardbody has a sticky exhaust valve and using marvel mystery oil will make it run smoothly for about 3K miles, then it sticks again. Add more mystery oil and it goes away.

09-26-2007, 08:27 AM

Newbsauce

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Quote:

Originally Posted by Braineack

its running on 3 clyinders.

Yep... the shaking and noise is very familiar. Thats running on 3 cyls. Definitely NOT valve noise.. valves sound like a very light tick.

09-26-2007, 09:07 AM

mazda/nissan

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Quote:

Originally Posted by Braineack

its running on 3 clyinders.

ruh-roh

then maybe my inline 4 is really an inline 3, i need to take it apart this christmas

09-26-2007, 12:28 PM

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Mach929

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my ka24de did the same thing, probably an injector. pull one injector plug off at a time and see which one doesn't make a difference. Mine must have had a bad connection because taking them on and off suddenly went back to normal

09-26-2007, 12:34 PM

#11

akaryrye

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long screwdriver but up against your ear does the same thing, just put the end against each injector to listen for the ticking. Then pull each wire out a bit to see if you hear the ignition system working.