The method may further comprise maintaining {TAIL ~ the at least one injector} on {HEAD ~ time} if at least one of the intake manifold pressure sensor has not failed and the ambient pressure sensor has not failed 
The method may further comprise maintaining { TAIL ~ the at least one injector } on { HEAD ~ time } if at least one of the intake manifold pressure sensor has not failed and the ambient pressure sensor has not failed
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH