Please don't give me credit for this. Jeff is the only one that figured out that the EGR is the probable culpirt here. I'm just confirming what he's indicating.TDikook said:That is freakin AWESOME! you guys rock for figuring this out. go figure, the ERG . and it seemed the alh guys had it right all along by removing them( for off road use only of course )
wow, gotta wait and see what Jeff figures out! and you are right, he is awesome, he worked on my car for over four hours trying to figure out why my car smokes so much, different maps, different ECUs, he tried everything, My Golf is just a smoker. but he went well past the extra mile to try and fix it.
Jeff in the man, by all means!!
Rock on Guys, Rock on
I've been getting the same overboost condition on my 05 PD Jetta Wagen. It's chipped w/RC2 (at this past April's HO5G GTG in NH). The Wagen has stock clutch and intercooler but upgrades are planned for it...currently not high priority but will eventually happen. So far no clutch slip (yet) and I'm being kind to it while in the 1800-2400RPM range but still get on it at higher revs. The PD JWagen only has 15k miles on it and my 02 Golf w/228k miles is still my daily driver.Pelican18TQA4 said:I've received a reply from Jeff and he is working on modifying a EGR valve to avoid it creeping open under high exhaust pressures. Of course, this would still leave it functional for emissions purposes. I certainly don't condone modifying the EGR to the point of it no longer functioning, but I made some block-off plates for mine and installed them today. I'm very happy to report that it seems my overboost issue has been eliminated!! Also, boost seems to develop slightly earlier leading to better torque off idle. Also noticed is that the strange bump in the hp/tq curve at around 2200-2400 RPM is gone. Again, I can't condone disabling the EGR for on-road purposes, but if you use your car off-road, I highly recommend this to alleviate overboost
Please note, this is applicable to modified PD100s only. Neither Jeff nor I claim that modifications like this will help overboost on anything but the PD100.
It might be the Intake Air Temp (IAT) creeping up and going out of spec, triggering the code and limp mode. I've gotten my limp modes more easily in the hot weather where heat soak is more of a problem.Pelican18TQA4 said:Uh oh, I've discovered a problem...I can't keep my right foot from being planted!! One thing I have noticed, the overboost issue is still there somewhat, but only at high RPM and I've only noticed it under full load. Hmm, perhaps the KP39 is still somewhat to blame.
My apologies to you and the Forum if my explanation of why I made my choice for a performance product was pissing and not explanation I intended it to be as to why it was best for me. I was sort of a third party invitee but your point has been made to this third party.GoFaster said:Folks, I just deleted the pi$$ing contest which ensued right after this. Inflammatory off-topic comments are against the forum rules. Both of the people involved know who they are. KNOCK IT OFF. Both of you.
That's great info Eric...it looks like the culprit has been located!TDikook said:I dont think that is the problem. if you look at the EGR valve itself. the valve opens INTO the exhaust side. I cleaned out my EGR and I noticed that around the so called sealing surface from the intake side to the exhaust side( there isnt a real surface) they were black, where I believe the leaking could be from. if that is the case (which is what I believe) bocking off the EGR contact with the intake side may be the only way. thank God I am Chipped. I am saving up for the delete kit now.
here is the pic of the EGR valve. notice on the bottom left where the black is. I couldn't get it off no matter how much I scrubbed. this is where I believe the leak is from. on top notice the spring pushes up. that keeps the valve shut.