A friend of mine has an 11 Pro. Last time out it started running rough. The dealer replaced the TPS - seemed to run fine on the stand but at low rpm the check engine light was on (went off above idle). Took the sled out again and still didn't run right. Back to the shop - now they're replacing the entire wiring harness. The bill is pushing $1100.00, is this typically the cost or is my buddy getting hosed?