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Revs holding while at WOT

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Old Jan 24, 2014 | 05:03 AM
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Revs holding while at WOT
At WOT it will rev to 4k (sometimes higher), pause for a second then continue to rev. Doesn't always happen, only every two or three runs.

Any ideas what could be causing this?

my evo is mostly stock
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Old Jan 24, 2014 | 06:37 PM
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Old Jan 26, 2014 | 02:42 PM
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the dreaded throttle hang....I dont think anyone has it figured it out!
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Old Jan 26, 2014 | 02:44 PM
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Originally Posted by Pirana
the dreaded throttle hang....I dont think anyone has it figured it out!
Throttle hang doesn't happen while you're WOT. This isn't the same thing.

OP, does it feel like you aren't accelerating during that pause? Sounds like it might be the clutch slipping.
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Old Jan 26, 2014 | 03:11 PM
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Oh! right, sorry....
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Old Jan 26, 2014 | 06:23 PM
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+1 for slipping clutch

Depending upon how heavily modded you are/ what fuel pump you're using it could also be fuel cut.
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Old Jan 26, 2014 | 08:27 PM
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^^ I'm running stock fuel setup and still make power at higher RPM after the pause



Originally Posted by Raptord
OP, does it feel like you aren't accelerating during that pause? Sounds like it might be the clutch slipping.
nope it holds at that 4k for that second. even if i got WOT still.
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Old Jan 26, 2014 | 09:11 PM
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Do you have a log of the issue?
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Old Jan 26, 2014 | 09:22 PM
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no i dont sorry, i could take it for a run and try and get a video of it happening
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Old Jan 26, 2014 | 09:33 PM
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Does the engine sound like its breaking up, bogging down, anything like that...that would cause momentary lack of acceleration?
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Old Jan 27, 2014 | 12:37 PM
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knock?
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Old Jan 27, 2014 | 03:49 PM
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Alright, next guess is that you're misfiring. What plugs are you running/ how old are they? Mileage/ how old are the wires?
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Old Jan 27, 2014 | 04:57 PM
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checked plugs and leads and they are fine. Plugs are only about 4k old, they are denso iridium's. Can't remember which ones exactly
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