Loss of power on shift

[psychonosspaz]

So I had this posted about a month ago, but since then hasn't happened until today AGAIN!

Car feels like it is running a little rough on idle, when I go to shift from 1st to 2nd and disengage clutch plus add throttle it's like the power totally cuts out for a second and then jerkily comes back....it happens for 2nd to 3rd shift as well?! Then it goes away after awhile and acts normally....I have a JB4 btw, but somehow doubt that is causing the problem.....any ideas people?

 

[Subliminal]

Are you still using the original spark plugs? I'm not sure if that would explain the shifting jerkiness but misfires could be causing the rough idle.

 

[robmarktoo]

I've had that happen a couple times either getting into 1st or 2nd, always on a cold engine. I've attributed it to letting the clutch out slightly too fast or some kind of ECU hiccup on a cold engine. No tune here, original plugs, 35k miles.

 

[psychonosspaz]

It has to be some sort of ECU intervention - just annoying as hell.....I have RS7 plugs which were installed about 2k miles ago also

 

[Crackness1]

So I had this posted about a month ago, but since then hasn't happened until today AGAIN!

Car feels like it is running a little rough on idle, when I go to shift from 1st to 2nd and disengage clutch plus add throttle it's like the power totally cuts out for a second and then jerkily comes back....it happens for 2nd to 3rd shift as well?! Then it goes away after awhile and acts normally....I have a JB4 btw, but somehow doubt that is causing the problem.....any ideas people?

I've had that happen a couple times either getting into 1st or 2nd, always on a cold engine. I've attributed it to letting the clutch out slightly too fast or some kind of ECU hiccup on a cold engine. No tune here, original plugs, 35k miles.

Same here. No rhyme or reason to it that I can find. Has happened less as time has gone on, not sure if it's a jb4 hiccup or not, but if it is, it's gotten less frequent (even though i'm on the original plugs at 32k miles), possibly due to firmware updates.

 

[GoatPowder]

Is it occurring in ESC "sport mode" as well?

I've noticed this on mine too (14k Cobb) but only with traction control active. I assumed it was the ECM cutting throttle to prevent slip.

 

[The Fed]

Set your JB4 to bypass and see if it still does it.

 

[psychonosspaz]

Is it occurring in ESC "sport mode" as well?



I've noticed this on mine too (14k Cobb) but only with traction control active. I assumed it was the ECM cutting throttle to prevent slip.

Doesn't matter and it happens with mild throttle input - not balls to the wall, so it's not a traction issue