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In the ac box
gearbox will fit, but the bellhousing may need to be swapped if you have both it is only 4 bolts to swith a a bell housing from one gear box to another
Look in a removable housing at the engine end of the upper radiator hose
On the transmission near the top on passenger side near the speedo cable
1990 Nissan/Datsun Truck D21 Truck 2WD 2.4L FI 4cylThe Spark Plug Gap.044 (In thousandths of an inch)
Pour 5 gallons of gasoline in engine bay. Strike match and ignite gasoline. Presto! All fixed!
The fuel pressure for a 1990 D 21 pickup is dependent upon the size of the engine. In general, the fuel pressure should be approximately 20 pounds per square inch.
12 gallons and if mileage is over 100k your getting 18 miles per gallon. so 18 x 12 = 216 miles before refueling actually holding the repair manual in my hand right now and owning a subscription to all data, the capacity is 15 7/8, i know that's the fuel capacity on my 1990 D21
One from another Nissan Navara D21
It stands for nothing other than Nissan's model designation. In the U.S. the D21 is called the Hardbody.