Car jumping or jerking

**moustafasou** · 07-19-2008 04:34 PM

I have a 2003 Audi A4 1.8T

When my car sits in idol my car jerks. and rpm jumps down then back up. My Rpm moves only a little bit, but you can feel the car jerk or do a small jump like feel.

You can also feels this jerk while driving.

Any ideas guys???

**J-jizzle** · 07-19-2008 07:28 PM

How bad is the jerk? Does it feel like the car looses power when it jerks?

**moustafasou** · 07-20-2008 11:26 PM

yes it does lose power when it jerks

**J-jizzle** · 07-21-2008 12:48 AM

Just speaking form my experiences but maybe your fuel pump is going out. It sounds close to what mine did. How long has this been goin on, and does it get worse as the car warms up?

Do you have a boost gauge? It might be a boost leak or a worn out DV, but not ever having a leak on my car I do not know the effects of a leak would be.

**moustafasou** · 07-21-2008 08:55 AM

Thanks for the suggestion..

My engine light finally stayed on. I will take it to an Autozone to get it scanned.

**J-jizzle** · 07-21-2008 05:22 PM

Ok you have a CEL...So that means its not your fuel pump. And I do not think boost leaks throw a CEL. Get that code a post up. Someone can help you out.

**04QuattroTurbo** · 07-22-2008 06:46 PM

Coilpacks?

**xscandals** · 05-19-2009 09:22 PM

hi moustafasou,
did you manage to find out where the issue was and sort it out ?
im having the exact problem. checked, no vacuum leak.

thanks

**braker15** · 05-19-2009 11:03 PM

Could be fuel delivery problem. but most likely coil pack. Post up the code and we go from there.

**sloweryucf** · 05-20-2009 07:28 AM

Originally Posted by moustafasou

Thanks for the suggestion..

My engine light finally stayed on. I will take it to an Autozone to get it scanned.

There is a technical service bulletin (group 37, number 06-11) on the valve body getting dirty or stiff which could be your problem.

**xscandals** · 05-24-2009 08:14 AM

unfortunately mine does not throw any codes.

it mostly does this lunge/jerk in the mornings, after 15 mins of driving, you dont feel a jerk but rpm and boost (from gauge) goes down then up when coming to a stop.

could it be my CVT ?