My car is fine now without the SAFC.. havent used it in months... running at 1bar boost.. no corrections.. i only turn everything on when i have some serious driving to do.. Until then, 1 bar with no corrections do just fine...

 

doesn't know what the problem is since the TPS is working. I guess I will have to live with the problem. The tech line on evo has no documented problem with the RPM risiing. i guess I am SOL.

 

snoop, if it keeps occuring just bring it back and go for a ride w/ a tech at the dealership. It's hard to get them to feel it, but once it happens they will be able to work on it more.

Sorry you couldn't get it taken care of. Don't give up; persist!!

 

Maybe the problem is mechanical, rather than electrical.

When I first felt this, I thought it was the clutch releasing too slowly. It seemed that when you push in the clutch pedal, the clutch itself did not release immediately. I'm not sure it makes sense mechanically, but I took out the restrictor in the clutch line to see if it would correct the problem. It didn't seem to help.

I guess if the master-to-slave line ballooned a bit, you could get some delay in response. Has anyone with the SS braided line observed the problem?

 

I thought that might be the issue as well, but that wouldn't cause the engine to rev up as opposed to dropping right?

It is more like if you were to disengage the clutch too EARLY, before letting off the gas completely (i.e. throttle closing to idle pos.). In that respect I am wondering if it has something to do with the rich conditions the car is running.

FWIW I haven't had this issue in 4 days now with the weather as it is. Screwy.

 

I looked at what mine was doing again, and it will do it if I am at 4500 rpms or more with around 10psi. It doesn't really do it at all when I am full throttle, but at part throttle it will raise the rpms.

 

Webguy - you're quite right, my mistake.

 

I talked to Andrew who owns DYNO4MANCE who has the same problem and that is what he thought that the problem is result of the car being rich. At 5000RPMS there is a lot of gas being dumped into engine especially at full throttle. The higher the throttle the more the RPM's will rise.

 

It's interesting that it happens at partial boost/partial throttle for the most part. If anyone is having this problem and has a wideband, they could check the a/f ratio at the rpm that it occurred and check to see what the story is. It just FEELS like there's some extra fuel being dumped/burned and that's causing it to seem like the throttle is still partially open.

It happened once on my way home today, and it's getting colder out. Seems weather dependant but that can't be certified as true that's for damn sure.

tsi90awd, no worries, I hope I didn't sound obtuse or anything!

 

The problem may be a defective MAF sensor or ECU. The problem didn't occur with AEM standalone in my car.

Has anyone tried putting a standalone ECU in there car?

 

My problem is gone!!!! All I did was get a mail in dynoflash and it hasn't happened to me since. So I do believe it is a result of the car running really rich.

 

Update I no longer have problem with RPM rising when I got the RPS clutch installed about a month and half ago. The Stock clutch disk was still in good condition but the preassure plate was defective and not clamping/releasing correctly so as result my RPMs rised at high throttle during 3-4 shift and I got 4th gear grind.

I changed my clutch with 22K on my car and now have 26K with no problems

 

must be nice, because I am now at almost 27K with the stock clutch still, making more power after getting an XEDE last weekend. with 291whp on the heartbreaker DD dyno (roughly 340 on a dynojet) and the problem just started after getting a tiny bit more power and installing the XEDE, would the XEDE have anything to do with this issue?? Its annoying as hell.

Here is my post on the issue.
https://www.evolutionm.net/forums/sh...d.php?t=102878

 

no one else has experienced such a thing???

 

desperate BUMP.