Question about 1999 Volkswagen Jetta

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I have a 1999 v/w jetta tdi after engine warms Ihave a longer than normal crank time

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You have a trait of a 99 TDI. It's been found to happen ONLY to late 99 TDI's, and it's a software glitch. If you want to spent the money (I did and HIGHLY recomment it) to chipping/reflashing the ECU it should go away

Posted on Apr 25, 2009

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2 Answers

Polo 14 tdi timing marks


At this LINK you will find a professional grade video of the whole job of replacing the timing belt.

Jul 13, 2012 | 2003 Volkswagen Jetta TDI

1 Answer

I have a 2000 Jetta diesel. Can you tell me where the plug for the block heater is? If indeed there is one.


In addition to the 4 primary glow plugs, the cooling system also has 3 Coolant Glow Plugs to help provide extra heat to the cooling system in order to warm-up the vehicle's interior more quickly, and enhance overall engine warm-up time. (Example - Some Mercedes diesel engines use electrical heaters in the cabin because their engine is so thermally efficient.)
Likewise, this auxiliary source of heat from the 3 Coolant Glow Plugs is necessary because of the VW 1.9 TDI engines outstanding efficiency, which wastes very little heat.


The 3 Auxiliary Coolant Glow Plugs are located at the end of the aluminum cylinder head (in a protruding flange) directly below the vacuum (brake booster) pump, which also connects to a coolant hose.

tdisline_180.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.

In conclusion, the period of Preglow and Afterglow is determined by the engine's coolant temperature (during a cold or hot start), which helps the ECU select a predetermined time-cycle for the combustion chamber and / or Auxiliary Coolant Glow Plugs to follow.

Finally, one myth that needs to be immediately debunked, is the belief that the TDI's advanced Glow Plug System is linked to the opening of the driver's side door, which is false! It is also noteworthy to mention that some earlier VW diesel glow plug systems were operated in this manner, but not so with the advanced VW Jetta 1.9 TDI engine.




Please do rate my response. Thanks!

Jan 23, 2011 | 2000 Volkswagen Jetta TDI

1 Answer

Where are the three glow plugs that are used for the heater/cooling located on an 02 vw jetta 1.9L tdi?


In addition to the 4 primary glow plugs, the cooling system also has 3 Coolant Glow Plugs to help provide extra heat to the cooling system in order to warm-up the vehicle's interior more quickly, and enhance overall engine warm-up time. (Example - Some Mercedes diesel engines use electrical heaters in the cabin because their engine is so thermally efficient.)
Likewise, this auxiliary source of heat from the 3 Coolant Glow Plugs is necessary because of the VW 1.9 TDI engines outstanding efficiency, which wastes very little heat.


The 3 Auxiliary Coolant Glow Plugs are located at the end of the aluminum cylinder head (in a protruding flange) directly below the vacuum (brake booster) pump, which also connects to a coolant hose.

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.

In conclusion, the period of Preglow and Afterglow is determined by the engine's coolant temperature (during a cold or hot start), which helps the ECU select a predetermined time-cycle for the combustion chamber and / or Auxiliary Coolant Glow Plugs to follow.

Finally, one myth that needs to be immediately debunked, is the belief that the TDI's advanced Glow Plug System is linked to the opening of the driver's side door, which is false! It is also noteworthy to mention that some earlier VW diesel glow plug systems were operated in this manner, but not so with the advanced VW Jetta 1.9 TDI engine.

Dec 16, 2010 | 2002 Volkswagen Jetta TDI

4 Answers

Do I need any special tools or wedge to change a timing belt for 2001 tdi jetta diesel.


Timing Belt Spanner Wrench
AST tool# H 2587-1

- Used for the Adjustment of the Timing Belt
- Applicable to 2004-2005 VW Golf, Jetta Pump Duse and 2002-2005 Audi 3.0 V6

Used for the adjustment of the timing belt.

2009 Suggested user price: $52.67

Assenmacher Specialty Tools
1 800 525 2943
Timing Belt Spanner Wrench
AST tool# H 2587-2

- Used for Adjusting the Timing Belt Tension
  • Applicable to 1999 and later VW Golf and Jetta, Passat and 1999-2003 VW Beetle with 2.0L Gas Engine and 1.9L T.D.I. Diesel Engine
Used for adjusting the timing belt tension and is comparable to VW tool# T10020. Applicable to 1999 and later VW Golf and Jetta, and 1999-2003 VW Beetle with 2.0L gas engine and 1.9L T.D.I. diesel engine.

2009 Suggested user price: $52.67

Assenmacher Specialty Tools
1 800 525 2943
128947643

Jul 02, 2010 | 2001 Volkswagen Jetta TDI

1 Answer

My 2002 Jetta TDI seems to be having a tough time


yes glow plugs have a lot to do with engine having tough
time in cold weather. before replacing glow plugs
check relay and fuses.

Nov 14, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

02 VW Jetta TDI with ALH engine glow plug


this is a common problem for these cars glow plugs go bad like spark plugs however the smoke would lead to bad mass airflow meter. it is not telling ecu corrcet miss. disconnect mass airflow meter. when cold see if this makes it start better. it should would means you need new m.a.f. glow plug issue take a test light place clamp on positive of battery then pull off glow plug connectors place tip of test light on glow plug the bad one will have a dull light unlike the good one which will be brighter. will need new plugs and wire harness four **** connectors and wire striper and crimper will fix concern good luck

Sep 01, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

Wondering what rpm should a 2002 jetta tdi be idling at?right now it seems at 850 to 900 which seems a bit high. i would figure it to be normal at 550 to 650 , any help is appreciated.


when cold it will idle a tad higher 850 - 900 is normal cold , and around 600 warm. if it is idleing high after warm up then check for excessive coke<carbon> build up in intake and throttle valve.

Mar 23, 2009 | 2002 Volkswagen Jetta TDI

2 Answers

Heater not working


vacuum to blend doors cancels when engine uses it upon acceleration... there is a check valve that could have failed there at vacuum lines to blend doors .good luck

Jan 14, 2009 | 2000 Volkswagen Jetta TDI

1 Answer

04 jetta 2.0 problems in the cold weather with headlights and AC


some diesels are like that i have a diesel truck i have to plug it it on winter does yours have a plug to plug it in that keeps it worl on winters so when you start in the morningsyou are all warmed up diesels are slow lazy starters need to get warmed up first but they are excellent cars will last longer than gas engines

Jan 08, 2009 | 2003 Volkswagen Jetta TDI

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