Run the car and check your hoses, Most likely it is the thermostat sticking closed and not allowing water to flow back to the radiator if your top hose is not hot and you can squeeze it then it is your thermostat.
SOURCE: 96 jetta overheating
there is sensor in the bottom off the rad that controls the cooling fan is it operating kdc744
SOURCE: need to locate fuel pump on 96 jetta
1996 Volkswagen Jetta 2.0L SFI 4cyl
On a Digifant fuel system, the fuel pump is mounted in a reservoir
under the rear of the vehicle. The fuel filter is also in this area.
The reservoir holds one liter of fuel and is supplied by a small
transfer pump in the tank. The transfer pump can be replaced separately
even though they are installed and removed as a unit.
The
Motronic system uses two fuel pumps. The first is a small transfer pump
to get the fuel out of the tank and the second boosts the fuel pressure
to the necessary amount. The transfer pump is located inside the tank
and the main pressure pump can be found under the vehicle. This
transfer pump is located under the rear seat and is part of the fuel
gauge sending unit. The main fuel pump can be found in the reservoir in
front of the rear axle beam. There is a check valve inside this pump to
maintain pressure in the lines, especially on hot days, to avoid vapor
lock. The fuel filter is mounted to the side of the reservoir. This
filter has no specified replacement interval and should be good for the
entire service life of the vehicle. Whenever the ignition key is in the
on position, the pump should run for at least two (2) seconds to
pressurize the fuel lines. If the Engine Control Unit (ECM) does not
see a signal from the Hall Effect sensor in the distributor it will
shut the pump off. If a Hall Effect signal is present, the pump will
continue to run as long as a signal is detected. It is this Hall Effect
signal that signals the ECM that the engine is rotating therefore
indicating that fuel is needed. The pump is operated via a relay that
is controlled by the ECM. This relay is located in the vehicles fuse
panel. The main contacts of the relay can be jumped to run the pump
during testing.
More details in Autozone.com (free register).
Good luck (rated this help).
SOURCE: when idling the temp. stays @190f ,when driving
need water pump has plastic torbine and slips off metal gear so change water pump and thermostat
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