The crankshaft position sensor can fail causing the engine to run poorly or it may crank but fail to start.
Problems for specific Nissan Maxima years:
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Repairpal verified 1990 Nissan Maxima problems
Failure of the vehicle's speed sensor can cause speedometer and the cruise control to become inoperative. A failed speed sensor will require replacement.
The fuel injectors can develop leaks on some models, causing the engine to run poorly or to become less fuel efficient.
A coolant leak can develop from the front of the cylinder head that can appear to be a head gasket leak. There is a threaded plug just below the camshaft that may leak if there is corrosion present on the threads. Cleaning any residue, re-installing the plug with pipe thread (Teflon) tape, and torquing the plug to the specification typically repairs the leak.