Question about 1999 Volkswagen Jetta

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1999 1/2 vw tdi jetta

Car will shut down randomly. I turn the key off then on again and all the indicator lights come on EXCEPT the glow plug. I notice it will not start again until the glow plug light comes on.

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  • highfreq Oct 16, 2008

    I have the same problem, when i am driving and slow down or come to a stop, my car will just shut down. I have to turn the key off, then back on and it wont do it till all the lights come on. I really need to find out whats wrong, my mechanic cant figure out how to fix it please help....

  • Anonymous Mar 23, 2014

    Polo 1.9 TDI Glow Plug indicator flashing and Emissions indicator on constantly

  • Anonymous Mar 24, 2014

    car driving fine until comes to crossroad then cuts out.turn key and drives fine again, also when ticking over it cuts out aswell.

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Glow plug relay is going out

Posted on Aug 26, 2008

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2002 vw jetta turns over but won't start and glow plug light did not come on


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p1248 is in the same error codes as the rest now i have been a mechanic for plenty of years and i will tell you it will be the glow plugs they have a certin limit to glow to start the car if they are worn or nearly gone they wont hold all the fire in them ,,,,Injection start control deviation means the car is not getting even to kick start it it maitanes and shuts the engine down if there is a problem i suggest you changed the plugs and see how you go here is a link to see http://www.patentstorm.us/patents/5778852/description.html

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Nobody knows TDI's better than these guys.

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tdisline_102.jpg
The 3 Auxiliary Coolant Glow Plugs use two (underhood) relays which are monitored and controlled by the ECU. During a cold start, the vehicle's interior temperature selector switch helps the ECU choose one of three modes depending on the amount of heat required to warm-up the coolant.

For example, Coolant Glow Plug #1 can be selected to operate all by itself, or #2 and #3 can operate together as a two-some, or lastly, all three glow plugs can form a triple source of heat for maximum enhancement of engine warm-up time.

After the engine is completely warmed up and the thermostat is open, the Coolant Glow Plugs normally shut-off and remain off unless the (thermally efficent) engine cools down sufficiently to have the computer signal them to come back on to keep the engine and cabin air warm. Extensive idling times at stop lights or in the driveway are scenarios where these glow plugs are most likely to recycle on and off.

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