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Re: 1992 Nissan pickup turns over gets gas has spark...
That compression is pretty low, you should be seeing around 140+ per cylinder. I would try a squirt of 90 weight in each hole and see if it will start.
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Question moved from 'Garden' to Nissan Cars and Trucks.
2400 is 2400 cubic centimeters which is the same as 2.4 liters. It is an inline 4 cylinder engine, so there is 3 valves per cylinder making 12 valves total, normally 2 intake valves and one large exhaust valve.
To much gas washes the cylinder walls,removing oil and lowering compression.Spark may be at plugs but may be to weak to jump the spark plug gap under compression.Also if spark plugs are black with carbon the spark may follow the carbon on them to ground and not jump the spark plug gap.
So.....put a small amount of oil in each cylinder,make sure plugs are CLEAN,give it a shot of quick start and give it a try with a FULLY charged battery.
There may be something amiss with the piston or valve.. and it's usually the exhaust valve that has burnt/split, allowing compression to be kicked straight out of the exhaust. The symptom of a burnt/split exhaust valve is akin to a misfiring spark plug
Could be anything. Vacuum, valves, rings, tune up. Check vacuum lines. Then check compression before you do a tune up. If you have bad compression in a cylinder, tuneups don't help. In that case, either drive it till it dies or replace/rebuild the engine.
Is that the engine with two spark plugs per cylinder? There is a good forum site for your pickup at Yahoo Groups. Look for Datsun 720 Pickups (your model is the 720).
it could be many things - this is what a mechanic would check.
the main things you need to start the engine is fuel a spark and air.
if one if these are not present the vehicle will not start.
check that the air filter is not blocked
check that the ignition sytem is working and a spark is present at the spark plugs and that they are clean and set correctly.
if the vehicle is running on diesel ensure the injectors are working a spark is not needed as the fuel will ingite through compression.
ensure that fuel is getting into the cylinder and that the cylinders have compression. this can be checked by fitting a compression guage in the sparkplug hole and cranking over the engine.
check that the exhaused is not blocked and that the burned gas can escape.
check plug and wire- wire may be burnt or jumping fire-plug may be loose---distributor may have cracked --if not above do compression check maybe blown head gasket
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