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Old 01-27-2013, 09:12 PM   #1
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Default ticking only when on throttle

I am having an issue that only occurred after my turbo install. Every time put my foot on the throttle i get this ticking sound. Never happens at idle or when cruising and only when in gear. I also think it intensifies dependent on how hard I mash the throttle.

What do ya'll think?
I'm kinda guessing drive train, but i sounds like its coming from the engine bay.
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Old 01-27-2013, 09:15 PM   #2
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Knock.
DET.

Whats controlling the fuel and timing?

How long have you been boosting? Has this been happening the whole time?
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Old 01-27-2013, 09:24 PM   #3
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lololol he's guessing drivetrain
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Old 01-27-2013, 09:27 PM   #4
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I have an aem fic. I've been boosted for about a week. yeah, happening about the hole time. If it was knock or det. would i happen even with a so little increase in throttle.

Also does knock or detonation happen very rapidly? (every cycle of the engine?)
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Old 01-27-2013, 09:29 PM   #5
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Quote:
Originally Posted by 18psi View Post
lololol he's guessing drivetrain
Sorry, but it is a guess, only based on the fact that there is more load on the trans/driveshaft/diff. when adding throttle.
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Old 01-27-2013, 09:42 PM   #6
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Stop boosting, right now. Holy ****.

You should start researching knock, what causes it, how to fix it, and what it sounds like.
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Old 01-27-2013, 09:49 PM   #7
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Quote:
Originally Posted by ericsbestshot View Post
I have an aem fic.
Do you also have a wideband exhaust sensor? If so, what is it reading when this occurs?

Can you give us a broad overview of what your fuel and ignition adjustments look like?

What injectors are you using?

(etc)

Quote:
If it was knock or det. would i happen even with a so little increase in throttle.
Hard to know, since we have no logs to look at. When you said that "it intensifies dependent on how hard I mash the throttle," this kind of suggests that it occurs only when in boost.


Quote:
Also does knock or detonation happen very rapidly? (every cycle of the engine?)
Typically, yes. In the most severe case possible, it would happen once per ignition event. It can also occur intermittently, and often begins in just one cylinder. Lots of variables.

It's hard to describe it to someone who has never heard it. Some people liken it to shaking a jar full of ball bearings, others to tapping very rapidly on the block with a small hammer.
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Old 01-27-2013, 10:21 PM   #8
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It could be something as simple as a pre turbo exhaust leak at the head where it only leaks once theres a little back pressure.

considering your freshly boosted assume its det and take it very easy.
did you retard the timing? running high octane fuel?

if the ticking happens in nuetral towards redline its more likely an exhaust leak.
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Old 01-27-2013, 10:29 PM   #9
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its set up to removed 1 degree of timing per 1 psi of boost
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Old 01-27-2013, 10:37 PM   #10
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how much boost you running? 93 octane?
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Old 01-27-2013, 10:44 PM   #11
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The most psi i've seen is 6psi and yes, running 93 octane.
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Old 01-28-2013, 05:12 AM   #12
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Very long shot, but it could just be bigger injectors ticking away while they inject. Its audible even on stock engines and could be mistaken for something worse if its the first time you start listening for trouble.
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Old 01-28-2013, 06:47 AM   #13
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Or an EBC valve for that matter...
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Old 01-28-2013, 09:44 AM   #14
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I would find someone near you that has turbo Miata experience and have them look/ride your setup before I did any more boosting. In Floridia, you should be able to find someone as there are a zillion miatas there. Just look at the Miatapalooza that is coming up.

The folks in this thread trying to help you need complete information on your specific setup. Turbo/injectors/intercooling, etc..
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Old 01-28-2013, 10:37 AM   #15
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One degree per psi is wonderful and all, but what was your BASE timing set at? Is it ten degrees or something more?

Do you have an 02 clamp? If not, have you read the sticky DIY FAQ for putting a turbo on a Miata?
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Old 01-28-2013, 11:17 AM   #16
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I did a bit of poking around. He is running stock injectors, and has a 2000. Using the FIC/6 for tuning. Guess we'll have to wait for him to provide more details. Probably at work now.
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Old 01-29-2013, 04:04 PM   #17
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Here is a log of what my car is doing. test=afr
Attached Thumbnails
ticking only when on throttle-datalog.jpg  
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Old 01-29-2013, 04:21 PM   #18
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Did you read my question?
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Old 01-29-2013, 04:24 PM   #19
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Some people really are too stupid to be helped.

Its so sad really.
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Old 01-29-2013, 04:42 PM   #20
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Stock timing, or at least I never changed it.
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