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-   -   rpm hang issue? (https://www.evolutionm.net/forums/evo-general/627529-rpm-hang-issue.html)

white_evo27 Sep 5, 2012 03:26 AM

rpm hang issue?
 
while im driving if i push the clutch in over 2200rpm the rpm's will hang there as if the car has cruise control, it never drops unless i put the car in 1st and slowly let off the clutch with no gas to get it to roll, then the rpms will fall... now if im driving and i push the clutch in under 2200rpm they will drop to normal idle. anyone have any idea what could be causing that to happen? its a PITA when in traffic. :confused: iac? throttle cable issue? any help would be appreciated. thanks! btw running AEM (no maf)

jameelrose Sep 5, 2012 04:03 AM

A tune fixes this on the stock ecu. Not sure about aem though.

metalsaber Sep 5, 2012 06:41 AM

Had the same issue.

1.) Clean your throttle body with cleaner.
2.) Is it an aftermarket throttle body? If so, it just may need replaced. Basically the flap isn't closing properly due to issues with the housing or flap. I changed to a different brand and it's been fine ever since.

white_evo27 Sep 7, 2012 11:02 PM


Originally Posted by metalsaber (Post 10382759)
Had the same issue.

1.) Clean your throttle body with cleaner.
2.) Is it an aftermarket throttle body? If so, it just may need replaced. Basically the flap isn't closing properly due to issues with the housing or flap. I changed to a different brand and it's been fine ever since.

ill try and clean it, its a stock TB on a magnus v2 intake manifold

SyZyGy1394 Sep 7, 2012 11:12 PM

What BOV/DV do you have?

white_evo27 Sep 7, 2012 11:19 PM


Originally Posted by SyZyGy1394 (Post 10388493)
What BOV/DV do you have?

Tial

S3CR3T Sep 8, 2012 02:42 AM

I recently got my car tuned and it now does this mine hangs at 3k for like a second with the clutch pressed in. I assume since my rpm hang problem came from a tune that a tune could also fix it.

SyZyGy1394 Sep 8, 2012 09:40 AM


Originally Posted by white_evo27 (Post 10388496)
Tial

Maybe you have too stiff of a spring. I'm using a 9 psi spring right now and want to try out the 7 psi one. I still have a little huff from the turbo before the TiAL opens, or at least sounds like it is, so I'm gonna try a softer one and see if it alleviates it.

ReignMan24 Sep 8, 2012 10:00 AM

i had this issue, turns out u need to adjust ur clutch pedal, surprised no one suggested that yet

forcedkseries Sep 14, 2012 06:20 PM

My car has a similar issue. Only mods are intake turboback and a exhaust

forcedkseries Sep 14, 2012 06:20 PM

*clutch

ChUt26 Sep 14, 2012 06:30 PM

Try adjusting your clutch pedal.

forcedkseries Sep 14, 2012 06:35 PM

I attempted that. Its a pretty aggressive clutch, I feel like I don't have much play in the pedal now

BEKevo Sep 15, 2012 07:27 AM

Check the TB seals as well, especially if youre going to clean it. Mine use to "hang" as well, and I alleviated the problem with new milspec TB seals.

veebee Sep 15, 2012 09:32 AM

yeah, check those tb seals. i ran into a similar problem, except if i would push the car hard for a short burst, it would hang around 3k and my air/fuel gauge would read lean (instead of "---" indicating the tb is closed) and sure enough i had a seal that was in absolutely horrendous shape


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