[jessyo77]

I hope someone has an answer for me. My Jetta started running a bit rough, especially at start up. I assumed it was the coil, all signs pointed to that. So I replaced it. Didnt really help. So I went to start it to leave work and it wont start at all. Cranks just fine, just wont fire. So after getting it scanned it gives me code P0321, all signs pointing to the engine speed sensor. So I replaced that as well and looked for bad connections. Still won't fire. I have checked the fuel relay, and all fuses. Any ideas what else could cause this? Maybe fuel pump? Frustrating.

 

[WishingBig]

Fuel pump you should be able to hear it kick on when you turn your key. Have someone get in the trunk and turn the key. Rough idle usually points to vaccum, fuel filter / pump and coils. So you eliminated coils and not wanting to start sounds liek a fuel issue.

 

[Akafishbone]

When my car coded.......... PO321 and PO322 - I went for the continuity in possible causes and replaced the Crankshaft Position Sensor. I understand these are problematic at about 50K intervals anyway. My EPC light was coming on intermittently as well.

Car runs like a top now.......... by the way mine is a 2001 1.8T

 

[jessyo77]

I have tested connections to the fuel pump, and it gets voltage at startup from the relay, but when I turn the key I hear a small "click" then just a quiet hum from the pump, no pressurizing the system that I can tell. It is all very faint, I can only hear it with the cover off (under the passenger backseat). Even if the crank sensor was bad, the pump should still kick on and pressurize, right? Until the ECU gets the signal from the crank sensor to keep the pump running?

 

[WishingBig]

http://wiki.ross-tech.com/wiki/index.php/16705/P0321/000801

16705/P0321/000801 - Engine Speed Sensor (G28): Implausible Signal

Possible Symptoms

• Engine shuts off
• Engine doesn't start
• Speedometer inoperative
• Glow Plug Indicator Lamp (K29) flashes

Possible Causes

• Engine Speed Sensor (G28) loose
• Engine Speed Sensor (G28) faulty

Possible Solutions

• Check Engine Speed Sensor (G28)

Special Notes

• The Engine Speed Sensor (G28) is also used as a reference sensor for the crankshaft position and correlates with the Camshaft Position Sensor Bank 1 (G40) and Camshaft Position Sensor Bank 2 (G163).
  • When an engine will not start due to mechanical timing or spark/fuel related issues it is not uncommon to set G28/G40/G163 fault codes. The basics should be checked if this code returns after extended craning and a no-start with a new sensor installed.
• When found in a VW Golf/Jetta (1J/9M) or Audi A3 (8L) with 1.9l TDI-PD (AXR), check TPI 2007067 which explains issues with electro magnetic interference. A modification to the wiring will fix this problem, extensive details can be found in the named TPI. Even though this TPI was originally released for VW Golf/Jetta (1J/9M), a customer of ours came across the same issue on an Audi A3 (8L).
• When found in a 2004 VW Golf, Jetta, or New Beetle with 1.9l TDI-PD (BEW), check for TSB 2010461 (01-07-45 formerly 97-05-03) or 201463 (01-07-44 formerly 97-05-04) calling for

 

[jessyo77]

I have already changed the Engine Speed Sensor, possibly a cam sensor? Maybe I will try the fuel pump and go from there. Thoughts?

 

[WishingBig]

I have already changed the Engine Speed Sensor, possibly a cam sensor? Maybe I will try the fuel pump and go from there. Thoughts?

Could still be a faulty engine speed sensor although it is new. Check to make sure the electric plug in is clean

 

[VDUB_Juan]

When my car coded.......... PO321 and PO322 - I went for the continuity in possible causes and replaced the Crankshaft Position Sensor. I understand these are problematic at about 50K intervals anyway. My EPC light was coming on intermittently as well.

Car runs like a top now.......... by the way mine is a 2001 1.8T

i got a P0322 code on mine. Do you know if having an 02 cam sensor on an 04 gli would make much of a difference?