Question about 1987 Nissan Pickup

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1994 Nissan Pickup 4x4 2.4L, Lack of Power

My 1994 Nissan seems to have developed a severe lack of power. Gas mileage has decreased. It does not run rough or miss. No visible smoke, nor is it burning oil. I have also noticed a change in the sound of the engine, makes kind of a roaring sound like it is laboring. I live and drive at high elevation, 9000 ft, and the problem is even more pronounced at higher elevations. Could it be O2 sensor or fuel mixture? Truck is very reliable but ridiculously slow.

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  • kanterstew Mar 14, 2009

    Did you mean FAN CLUTCH??

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Hi check and make sure that your clutch fan is not seased up and any of your pullies as well,and check for good exhaust flow unhook cat convertor then take for drive and see if it has power

Posted on Feb 06, 2009

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Posted on Jan 02, 2017

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1 Answer

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Lack of power


You should try doing a tune up change spark plugs, wires, pcv,and fuel filter.it's reasonable to assume that the rings and
valves (inside the engine) have become worn. Worn rings
and valves will cause the engine to have low compression
and low compression = weak power.
You may be curious as to why the engine's lack of power is
most evident when driving up a hill. Well, when a vehicle is
going up a hill, the engine is under more stress than when
driving on a flat road. Therefore, any wear in the rings/valves
will tend to be revealed - in the form of compression - when
the engine is under stress.

you will need to have a mechanic verify that the rings and/or
valves are indeed worn. Incidentally, this generally involves
what's known as a "wet compression test".
If the mechanic tells you he positively confirmed a worn ring
and/or worn valve condition, don't immediately authorize him
to do the work. Why? Because, this type of work is very
expensive and therefore you'll want to get several opinions
before jumping into anything. By the way, even though this
vehicle's high mileage strongly points to the above diagnosis,
it's possible the cause of this problem is something else.
For example, one of the electronic sensors that controls the
engine may have gone bad. hope this help have a nice day.

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