Basically when going highway speeds the car starts to jerk/hesitate when holding the speed limit. It seems like the bumps are causing the car to jerk also if im building boost the car will blow off when I hit a bump like I let off the gas even though I don't. This only occurs at highway speeds and in the city the car drives like a dream. Car is an 01 VW GTI.

 

stock? If not check your pipe connections to start.

 

At what throttle position does this happen? You may have some sort of part throttle mapping problem, and may need some more tuning. Torque loads are different depending on gear ratio, so it may not show up in lower gears at lower speeds.

 

just lightly holding throttle like 2800 rpms@60mph. I'm gonna clean my maf tomorrow and see if that helps the problem at all.

 

Try to replicate that throttle position in a different gear around town and see if you can spot any common behavior.

 

will do but it seems like this problem only happens on bumpy roads because when i'm driving around the car always seems to run like shit on the extremely bumpy roads

 

May be a loose coupler in the intake system, or some other type of intake leak. If you have an engine with a MAF, any leak that is between the MAF and the engine can cause glitches. Once you measure the airmass with the MAF, any air that is lost or gained can make glitches because the engine isn't getting what the ECU has already predicted.

There are other possibilities too, it's going to be something mechanical though probably because of the bumpy road stuff. Check that you don't have any cracked spark plugs, and that your plug wires are making proper (tight) contact and don't lose continuity when wiggled, etc.. This is going to be a fun thing to track down, make no mistake...

 

I just replaced the spark plugs and coil packs last week but I am going to check if they are tightened down all the way and see if that helps

 

my dizzy was loose and it did that

 

I'd be surprised if there was a distributor and coil packs.