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Old 04-28-2016, 01:12 AM   #1
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Default Faulty throttle cable?

I have been having this issue on and off. It's hard to replicate and I can go 3-4 days without noticing and then on the 5th day it will happen briefly and then won't notice it for another 4-5 days.

-RPMs will jump when you rev the car while stopped in neutral
-RPMs will hold for 1 second
-If you are in gear and you lift of the gas pedal and clutch in, revs will jump
-If you are trying to shift through the gears, revs will jump when you clutch in to shift
-Usually happens within the first 10-15 mins of driving, if it doesn't happen then, then I don't notice it for the rest of the drive.
-Might be a coincidence but seems to not happen if I turn the car off and back on?

First 2 videos from earlier today, last one was recorded just now.

Seems to retract fine, car off -

Seems to be working fine, car on -

Seems to be retracting very slowly, car off -

It's too late at night for me to try now, but I am guessing if the car was on in the 3rd video, the revs would jump/hold, correct?

Going to try and clean and lube what I can, maybe that may help before maybe replacing the cable if that's the issue.

Thanks in advance.
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Old 04-28-2016, 02:27 AM   #2
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The cables are extremely cheap. Just replace it.
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Old 04-28-2016, 02:33 AM   #3
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Good point. I guess I was maybe seeking some assurance that it does indeed sound like a faulty throttle cable and replacing it would fix the issue I seem to be having.

I'll place the order for a cable tomorrow as there was none at the dealerships in town today so hopefully by next week I'll know for sure.
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Old 04-28-2016, 10:07 AM   #4
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Also nevermind all the dumb m.net threads about replacement being a pain in the ***. Look at your new cable, observe the orientation of the two tabs under the dash. Use a small vice grip to depress the tabs and push it out.

Last edited by albumleaf; 04-28-2016 at 09:02 PM.
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Old 04-28-2016, 10:12 AM   #5
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Those cables can melt if they aren't shielded from all of the exhaust components. Throttle return springs can break (I haven't specifically heard of it happening on a Miata). They can also be kinked or crushed by careless work under the hood.

As Andrew said, definitely change cable, but try to determine the root cause so it doesn't reoccur.
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