The 1990 Isuzu 2.8 liter engine MAF sensor can be found on the firewall in the engine compartment. The sensor will be on the passenger side of the firewall.
about 5 qts
1 - 4 - 2 - 5 - 3 - 6
they are gear to gear driven.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
1-3-7-2-6-5-4-8
Check the wire connections on the coil. If ok, the tach may be bad.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
( 6 quarts ) of 5 W 30 engine oil with filter change
5 Qts. of motor oil ( 6 quarts with filter )
The 4.2 liter V6 firing order is ( 1 - 4 - 2 - 5 - 3 - 6 )
Iv had a 94 ford f150 5.0 liter engine for 5 years I use regular 10w 30 oil and it's worked fine for me truck still runs great