A ticking noise may be noted from the engine valve train area. This is commonly caused by varnish build up in the hydraulic lash adjusters (HLA). Our technicians tell us that using Mobil 1 synthetic oil has been successful in cleaning the varnish deposits and quieting the lifter noise.
Problems for specific Isuzu Trooper years:
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Most reported 1996 Isuzu Trooper problems
The 4WD indicator may say on in 2WD mode due to a faulty vacuum solenoid or valve. All 4WD vacuum hoses, solenoids, and valves should be inspected and repaired or replaced as necessary to correct this concern.