Hello
I've had to do a few things to a newly purchase 2000 (X Reg) A2 petrol 1.4.
It has a coil pack & spark plugs.
It's started misfiring on cylinder 3 (error P0303) as well as an intermittent P0302 (cylinder 2). This is something that has just started to happen after I've fixed other things. I've read the generic 'possible causes' for this code but think it's electrical.
Prior to this, it failed it's MOT last week due to the airbag light being on as well as an emissions failure. It had the EML (engine management light) as well as the ESP light illuminated.
I have an old, generic usb / communication lead as well as the 'VWTool' software.
With the lead & software is was able to clear the airbag light fault (which hasn't reappeared) as well as fix the other faults. The EML problem was the blowing of fuse 31 which is linked to the ERG valve. The actual problem was the oil breather heater? which I have temporarily disconnected. The fuse no longer blows.
I also removed the ERG throttle body & cleaned it then reset it via the VWTool.
This cleared all of the codes and all looked OK. However, it developed the P0303 error code & runs as rough as a bag of spanners.
I can't get the emissions retested with it running like this.
Plug 3 has no spark. I'd already changed the plugs when we got the car but the old ones looked quite new. It was running OK before & after the change. I've used one of the old plugs to check everything. The no 3 lead works as I swapped it with another so I don't think it's the plug or lead.
So, here (finally) is are my questions:
1. How would I go about checking the coil pack (looks like a flat distributor)?
2. Is there something I could have messed up, doing any of the above that might cause this? Either physically, like disconnecting the breather heater or removing the throttle body or maybe a setting via the software?
3. Can I check the coil voltages? If so, what do I need to do?
3. Could it just be coincidence that this has failed whilst doing the other stuff? (this is slightly rhetorical)
4. Any other ideas? Anything else I can check? Connections, fuses, blocks via the software? I've monitored the misfires in block 15 of the software & no. 2 seems almost as bad as no 3 although 2 does have a regular spark if I check it.
I'm quite a novice with fuel injection systems with electronic ignition and need to know that if I do need to buy something, it's the right something.
I have until this thursday for my re-test or it has to all be redone : (
Thanks very much if you can point me in the right direction
I've had to do a few things to a newly purchase 2000 (X Reg) A2 petrol 1.4.
It has a coil pack & spark plugs.
It's started misfiring on cylinder 3 (error P0303) as well as an intermittent P0302 (cylinder 2). This is something that has just started to happen after I've fixed other things. I've read the generic 'possible causes' for this code but think it's electrical.
Prior to this, it failed it's MOT last week due to the airbag light being on as well as an emissions failure. It had the EML (engine management light) as well as the ESP light illuminated.
I have an old, generic usb / communication lead as well as the 'VWTool' software.
With the lead & software is was able to clear the airbag light fault (which hasn't reappeared) as well as fix the other faults. The EML problem was the blowing of fuse 31 which is linked to the ERG valve. The actual problem was the oil breather heater? which I have temporarily disconnected. The fuse no longer blows.
I also removed the ERG throttle body & cleaned it then reset it via the VWTool.
This cleared all of the codes and all looked OK. However, it developed the P0303 error code & runs as rough as a bag of spanners.
I can't get the emissions retested with it running like this.
Plug 3 has no spark. I'd already changed the plugs when we got the car but the old ones looked quite new. It was running OK before & after the change. I've used one of the old plugs to check everything. The no 3 lead works as I swapped it with another so I don't think it's the plug or lead.
So, here (finally) is are my questions:
1. How would I go about checking the coil pack (looks like a flat distributor)?
2. Is there something I could have messed up, doing any of the above that might cause this? Either physically, like disconnecting the breather heater or removing the throttle body or maybe a setting via the software?
3. Can I check the coil voltages? If so, what do I need to do?
3. Could it just be coincidence that this has failed whilst doing the other stuff? (this is slightly rhetorical)
4. Any other ideas? Anything else I can check? Connections, fuses, blocks via the software? I've monitored the misfires in block 15 of the software & no. 2 seems almost as bad as no 3 although 2 does have a regular spark if I check it.
I'm quite a novice with fuel injection systems with electronic ignition and need to know that if I do need to buy something, it's the right something.
I have until this thursday for my re-test or it has to all be redone : (
Thanks very much if you can point me in the right direction
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