Question about 2000 Volkswagen Jetta TDI

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Po 252 this is a 02 jetta tdi 1.9 replaced the glow plugs and now ck engine lamp comes on after 20 or 30 miles scanner reads po 252 inj pump fuel metering control 'a' range performance cam/rotor/injector any ideas

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Hi changing glow plugs is nothing to do with this code i would change the fuel filter and put a injector cleaner into the fuel tank as if this doesn,t cure the problem the only other thing that affects the pump is the timming belt has it slipped a tooth is there a marked drop in preformance if not these pumps are expensive very expensive best of luck yates210456

Posted on Oct 17, 2008

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2 Answers

Tdiclub.com


THE SMOKE YOU HAD IS BECAUSE MANY TRIES TO START COLLECTED FUEL IN THE COMBUSTION CHAMBERS AND SUDDENLY BURNT ON START. ANY WAY THE HESITATION OF CRANK START FOR LONG TIME CHECK WHETHER YOU DO NOT HAVE A PROBLEM WITH THE FUEL PUMP,FUEL FILTER OR COLD START SENSOR. CHECK YOUR SPARK PLUGS CLEAN THE THROTTLE BODY AND DO WITH SCANNER THE ADAPTATION.S

Aug 29, 2012 | 2001 Volkswagen Jetta TDI

1 Answer

1998 ranger 2.5 manual enging miss


ck for leak at intake. if no leak pcm/ecm may be sending fire command to slow to # 1 . the fuel injector is always hot the ecm sends a ground to the injector. even new parts can be bad ck inj, with ohm meter resistance should be the same between each inj. im not sure of the specifications but they should read the same my jimmy specs are 1.9-2.1 any other reading is bad . no resistance or lower or higher readings my injector would be bad. 140 is good reading, timing can be off a little and still run but rough like a miss. a code wont set most misfires will set a dtc or flash the engine light to let you know damage to cat system is happening , to much fuel a system rich,to little a lean. a bad mass airflow meter can also cause a misfiring or rough idle ck with scanner if dirty clean with brake cleaner first before replacing . hope this helps some let me know how it goes.

Jul 15, 2012 | Ford Ranger Cars & Trucks

1 Answer

I replaced battery and alternater on my 2002 vw jeta with 1.9 tdi engine and battery keeps running down what is the problem?


If this was why you replaced the battery and alternator then you have a draw above normal.

Normal draw will be under 30ma when vehicle locked.

Even a new component can be bad out of the box. Check glove box and trunk illumination first to see they go out when closed.

Next the overhead illumination...is it off when car locked?

Do you have a aftermarket radio? Amps can stay on.

Next check the glow plug harness for power when the engine is off. Possible the glow plug relay is stuck on.

Contrary to popular legend, this vehicle does not have an electric fuel pump. Fuel is pumped by the injection pump on the engine so you don't need to check this..

VW recalled the brake lamp switch...check with VW to see if yours has been done. Have your VIN # handy when you call.

Engine cooling fans 'after-run' relays can stay on too long too. After engine stopped, check to see if cooling fans continue to run. Should shut off after 10 minutes.

O

Jan 10, 2011 | 2002 Volkswagen Jetta TDI

3 Answers

Will not start in cold weather. Starts great if temperature is above 20 degrees. New battery and no problem found by mechanic.


There is a 5th injector called the cold start injector, that is electrically controlled off the starter. You can easily unscrew it while still attached to hoses and wires, and watch it squirt. You can also verify it is getting voltage with a test light or meter. There is also a thermal timer for it that could be bad and preventing current from the starter.

Jan 03, 2010 | 2002 Volkswagen Jetta TDI

1 Answer

# 1 glow plug code shows up. after restting it it comes back on. I checed the glow plus they are fine, all four working.


Yah, my 02 did the same thing. Could be 1 of 2 things-

The ECU always sends a tracer signal out to the plugs. This not only tests for a bad plug, but also for a resistance imbalance before a plug even goes bad. It's a very small change in resistance and you'll need an analog ohm meter to see it accurately. Oh, and just because the car says it's #1 glow plug doesn't always mean #1 is at fault. I've tested some cars with the numbering order backwards. If your car has some miles on it, I'd replace the 4 of em', they go for around $65

The other issue is that it's has been with the harness corroding up. New ones again go for arouund $65. The replacement is either fish the new wiring a through the engine compartment, or cut, splice, and heatshrink

Jan 02, 2010 | 2003 Volkswagen Jetta TDI

1 Answer

2001beetle tdi hard starting


The stuff that you replaced could have an effect on the starting of the vehicle. Take the diesel pump and injectors for calibration this should solve the problem.

Sep 12, 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

03 jetta tdi won't start turns over fast won't kick ,cracked open injectors it's getting fuel,also put a clear tube on fuel line and it is sucking in fuel


Ck. anti shake shut off butterfly valve(vacuum actuated) at intake manifold, sometimes they stick. I'm assuming all the glow plugs are working?

Jul 06, 2009 | 2003 Volkswagen Jetta TDI

9 Answers

MY GLOW PLUG LIGHT IS FLASHING IN MY DASH BOARD VW 1997 PASSAT TDI.WHAT IS MY PROBLEM?


Despite what you may read from other comments....The glow plug light is simple a multi function warning light and IS among many othed things in fact used to warn of brake light and brake light switch failure. Therefore it can NOT be treated as glow plug problems only.
I have worked on V.W for many years and have encountered this problem many times. You should get the OBD codes read. This will reveal the exact problem...and there may be more than one
You can contact your V,W agents if you wish and check to see if I am correct.
Best of luck
John

Mar 21, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

Volks wagen golf diesel tdi Nreg


Check the glow plug thermo sensor...found in the cylinder head.
Unlightly anything wrong with injector pump.
Good luck
John

Feb 15, 2009 | 2002 Volkswagen Jetta TDI

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