How to Eliminate "Rev-Hang" on the 05+ EVO 8/9s
Jul 17, 2013, 08:28 PM
#32
My rev hang is 100% gone. Can't believe it. Just this morning I was thinking if I can't make it go away I'll sell the car and get a GT-R or something someday. Was totally sucking the fun out of driving a manual.
Jay I sent $10 your way on PayPal. Get yourself a six pack on me.
Jay I sent $10 your way on PayPal. Get yourself a six pack on me.
Jul 18, 2013, 08:22 AM
#35
If you are looking for a cause of the type of behavior described, the engine accelerating off throttle, consider what might be happening to make it accelerate. One factor is that it's behaving as though you have your foot on the gas still, correct? This is essentially air is getting through the intake as if the throttle plate is still open. This path of thinking is what the code fixes address, but it could also be air getting in after the throttle plate. Any super en leaning condition will make the motor accel with the clutch depressed (no resistance on the motor).
Check for boost leaks after the TB. All those tiny ERG hoses and fittings, can leak a little bit and you will still drive relatively fine with boost pressure but they will leak in vacuum as well. Off throttle after a big pull creates a lot of sudden vacuum which will pull in air for a few seconds enough to rev up an engine that is not connected to the driveline.
Check for boost leaks after the TB. All those tiny ERG hoses and fittings, can leak a little bit and you will still drive relatively fine with boost pressure but they will leak in vacuum as well. Off throttle after a big pull creates a lot of sudden vacuum which will pull in air for a few seconds enough to rev up an engine that is not connected to the driveline.
Last edited by fireroasted; Jul 18, 2013 at 05:41 PM. Reason: grammer
May 26, 2015, 03:58 AM
#39
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Hello everyone!
How i can correctly resolve problem (rev hang) on my 88580714 rom?
In my 88580714 i dont see tables from this guide
http://2.firepic.org/2/images/2015-0...og56zv8y9b.png
thats all what i have
Maybe exist custom XML definitions with those tables (i searched... but with no result
)
if EDM roms don't have solution, can i use USDM rom on my car?
Anybody know "true way" for fix rev hang.. for EDM roms
Thank for answer!
How i can correctly resolve problem (rev hang) on my 88580714 rom?
In my 88580714 i dont see tables from this guide
http://2.firepic.org/2/images/2015-0...og56zv8y9b.png
thats all what i have
Maybe exist custom XML definitions with those tables (i searched... but with no result
)if EDM roms don't have solution, can i use USDM rom on my car?
Anybody know "true way" for fix rev hang.. for EDM roms
Thank for answer!
Last edited by Pyatka-ubiyca; May 26, 2015 at 05:13 AM.
May 28, 2015, 12:00 AM
#40
Hello everyone!
How i can correctly resolve problem (rev hang) on my 88580714 rom?
In my 88580714 i dont see tables from this guide
http://2.firepic.org/2/images/2015-0...og56zv8y9b.png
thats all what i have
Maybe exist custom XML definitions with those tables (i searched... but with no result )
if EDM roms don't have solution, can i use USDM rom on my car?
Anybody know "true way" for fix rev hang.. for EDM roms
Thank for answer!
How i can correctly resolve problem (rev hang) on my 88580714 rom?
In my 88580714 i dont see tables from this guide
http://2.firepic.org/2/images/2015-0...og56zv8y9b.png
thats all what i have
Maybe exist custom XML definitions with those tables (i searched... but with no result
)if EDM roms don't have solution, can i use USDM rom on my car?
Anybody know "true way" for fix rev hang.. for EDM roms
Thank for answer!
Jul 10, 2017, 02:04 PM
#43
My solution
Mine felt like it stayed where it was when I lifted to shift, tried some different things but the fact it felt as something was pushing or pulling on throttle plate disturbed me. So I added a spring from throttle arm to the strut tower brace (temporary nd better mounting solution) and it drives awesome now. Had car for awhile and thought throttle felt light the whole time. Just my .2¢
Jul 10, 2017, 02:39 PM
#44
Mine felt like it stayed where it was when I lifted to shift, tried some different things but the fact it felt as something was pushing or pulling on throttle plate disturbed me. So I added a spring from throttle arm to the strut tower brace (temporary nd better mounting solution) and it drives awesome now. Had car for awhile and thought throttle felt light the whole time. Just my .2¢
