PDJetta
Top Post Dawg
- Joined
- Nov 6, 2003
- Location
- Northern Virginia
- TDI
- '04 Jetta GLS TDI Pumpe Duce Platinum Grey w/ Leather
Mom's 2000 TDI had an intermittent CEL and code P3130, EGR Regulation Exceeded, code stored. Since her car just became subject to OBD II emissions testing (just enacted in Northern Virginia for diesel cars w/ OBD II systems), I decided to take a look.
I think I have solved the problem.
I originally noticed, using VAG-COM, that on idle air requested was about 275 MG/Stroke and actual was about double that. Hmmm, the EGR system must be clogged, I thought. I cleaned out a plugged up EGR cooler, and a month later Mom said the CEL came on again. Air requested was half of air actual again, and same P3130 code was stored. I noticed a cracking vacuum hose to the EGR valve, and replaced it. Two months later, same thing--CEL on again intermittently and the same P3130 code.
This time I checked the EGR valve. I would not hold vacuum applied to its diaphragm--It leaked badly. The valve was inoperative! I verified this by simply conecting a vacuum hose to the diaphragm nipple, and sucking on the hose. It leaked badly, and the valve pintle never raised.
Yesterday I installed a replacement EGR valve from IMPEX (I bought the less expensive non-VW one, but oddly, it was made by the same manufacturer-Whaler) for $168 (VW wanted $285 for an EGR valve!).
Now when idling, the actual and requested air amounts are virtually identical and after a minute, the EGR cuts off, like its supposed to and the actual air quantity (past the MAF) doubles, blip the throttle, actual and requested air amounts are then identical again. I doubt if the CEL will come back on.
Just something to check if you have the P3130 code. Overall, this code means that not enough exhaust is flowing into the intake through the EGR valve and this could be caused by several things. In Mom's case, it was a bad EGR valve diaphragm.
On a side note: When removing the old EGR alve, when pulling off the anti-shutter valve vacuum line, the plastic nipple broke clean off of the vacuum diaphragm, and with supprising little effort. This was not an issue, since the new EGR valve had the anti-shutter valve diaphragm on it. But, is there a replacement source for this plastic vacuum actuator for the anti-shutter valve, other than buying the whole EGR valve? That little plastic arm on the diaphragm can break too! Just wondering.
Also, any tricks to keep from breaking the nipple off?
--Nate
I think I have solved the problem.
I originally noticed, using VAG-COM, that on idle air requested was about 275 MG/Stroke and actual was about double that. Hmmm, the EGR system must be clogged, I thought. I cleaned out a plugged up EGR cooler, and a month later Mom said the CEL came on again. Air requested was half of air actual again, and same P3130 code was stored. I noticed a cracking vacuum hose to the EGR valve, and replaced it. Two months later, same thing--CEL on again intermittently and the same P3130 code.
This time I checked the EGR valve. I would not hold vacuum applied to its diaphragm--It leaked badly. The valve was inoperative! I verified this by simply conecting a vacuum hose to the diaphragm nipple, and sucking on the hose. It leaked badly, and the valve pintle never raised.
Yesterday I installed a replacement EGR valve from IMPEX (I bought the less expensive non-VW one, but oddly, it was made by the same manufacturer-Whaler) for $168 (VW wanted $285 for an EGR valve!).
Now when idling, the actual and requested air amounts are virtually identical and after a minute, the EGR cuts off, like its supposed to and the actual air quantity (past the MAF) doubles, blip the throttle, actual and requested air amounts are then identical again. I doubt if the CEL will come back on.
Just something to check if you have the P3130 code. Overall, this code means that not enough exhaust is flowing into the intake through the EGR valve and this could be caused by several things. In Mom's case, it was a bad EGR valve diaphragm.
On a side note: When removing the old EGR alve, when pulling off the anti-shutter valve vacuum line, the plastic nipple broke clean off of the vacuum diaphragm, and with supprising little effort. This was not an issue, since the new EGR valve had the anti-shutter valve diaphragm on it. But, is there a replacement source for this plastic vacuum actuator for the anti-shutter valve, other than buying the whole EGR valve? That little plastic arm on the diaphragm can break too! Just wondering.
Also, any tricks to keep from breaking the nipple off?
--Nate
Last edited: