typically you cant run the motor w/o a MAF or AFS what ever the OEM calls them. there are 2 basic types out there... Speed density cars and Air Flow metered cars. The engine needs to either have a calibrated value of what air is entering the intake ( via a table inside the computer) or the Air flow sensor. Some newer (96+) cars can run in limp mode without the sensor, but early cars / truck can not. Just my $0.02