Having problems with your 1995 Volkswagen Jetta ?

Hi, My Jetta3 cli guage is showing that the car is overheating. The electronic console unit reports correct temperatue 94 degrees. The car is using in excess of 14L/100km. This is attributed to the car thinking it is over heating and therefore supplying more fuel. The four pin temp/fuel which was causing the car not to start properly (but displaying correct temperatue). I've changed the four pin temperature switch (with the same yellow colour code), the car now starts properly but is using exces

Posted / edited by AnonymousUser on : 24-02-2020

Answers :

May be oxygen sensor which also regulates fuel. That plus temp sensor is main inputs to fuel control. As 02 sensor fails computer can send wrong amount fo fuel and this will eventually burn up your cataylic convertor which will cause more problems. scanners are hard to come by on bosch systems but you need to get some info on voltages coming from 02 sensors and look for cross counts which is an indication of reaction times for the sensor. It should show movement from high to low voltage as the computer adjusts fuel. If the signal is staying in one range the computer will keep adding fuel thinking it is running lean. Hope this helps a little. If so please reply as this helps me continue to answer questions here and good luck
Repair Help & Product Troubleshooting for 1995 Volkswagen Jetta

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