I've recently had the timing belt to go out on my 06 Sorento and damaged my heads. I've replaced the heads with rebuilt ones and it started and ran fine until I went back in to retorque the head bolts. After I put the plenum back on and put all the vacuum hoses and wiring back in place it wil start for a second or two, barely even idles, then dies. The only code it throws is for the mass air flow sensor, saying the voltage is low. When it does run it acts like it is starving for fuel but i pulled the plugs just to double check them and they looked to be fouled with fuel. I replaced them with new plugs no difference. Vehicle only has 89k miles on it. Will the mass air flow sensor cause this?