I had similar issues. Replaced throttle body with no improvement. Dealer suggested replacing ECU next but could not confirm if this was the actual problem since I was tuned (APR stage 1) and the codes were all over the place. Instead of attempting the ECU replacement, I had the APR tune removed...
A few weeks ago while driving on the highway, the car sputtered / died and EPC light came on as well as "!" cruise control fault.
Started the car back up and it drove okay for a few miles, then it started to sputter and got CEL (code P0121 - Throttle Position Sensor). Idle would oscillate wildy...
SOLD
Struts / shocks are in good shape. Less than 2 years old with 30k miles.
1 front strut was missing the original white plastic washer (rolled away / disappeared in the garage after removal) but my mechanic provided a plastic washer which serves same purpose.
$150 picked up in central NJ...
SOLD
APR Carbonio stage 1 intake in excellent condition. No scratches, no yellowing carbon fiber.
$175 shipped or $150 picked up in (or around) Medford NJ.
Selling my set of Koni STR.T struts / shocks with less than 2k miles on them.
As you'd expect they are in great condition. These ride great with lowering springs but I'm taking a new direction.
SOLD
Fumoto F106N for VW.
https://fumotodirect.com/shop/standard-nipple-n-series/f106n
$15 shipped. Works great. Replaced this with a shorty version when I replaced my oil pan.
I'll be installing a WALK soon and will need an alignment. Redline speedworx is a 65 mile drive from my home in Medford. Not sure I want to drive it that far after I get the kit installed.
Any reputable shops in the cherry hill, mount laurel, mount holly area?
I visited a few local shops...
I've given up on attempting to hide mods from the wife... never ends well. Like the time I tried to "sneak" my car to the tuner for a stage 1 tune... well, the ECU bricked and I was without a car for a week. Hard to hide that. :(
I also have 2 kids. Modding is less of a financial constraint...
Very cool. Do you plan on warning your neighbor or will you sit back while nature takes care of the yappy dog? That would be something to see. Keep the camera handy. ;)