P0011 and P0021 after engine swap

[jwalker1970]

2007 Kia Optima 2.7L Runs like crap, check engine flashing codes P0011 and P0021 after engine swap.

Verified solution: VVT (variable valve solonoids) mounted under fuel rail connections, had wiring switched between front and rear sensors, causing code to set for front and rear. NOTE: front sensor wiring is clipped into a small bracket, rear sensor wiring runs direct from the larger harnass. Both plugs will reach both sensors.

Switched to proper location & car runs perfect now, no hesitation, no check engine!