Diesel Cayenne and VW emission issue
01-03-2018, 08:53 AM
#5086
Burning Brakes
I dose the fuel with PowerService in the white bottle-the cold weather formula. I bought the last 7 of the 2 1/2 quart bottles for $4 each at a local Walmart a few years ago as spring started and they must have wanted them gone and I was all too happy to take them.
Last edited by BenCD; 01-03-2018 at 03:24 PM.
01-03-2018, 11:51 AM
#5087
01-03-2018, 01:25 PM
#5088
Rennlist Member
Originally Posted by OmniGLH
I use Stanadyne year round. We swore by it when I used to work for Navistar.
01-03-2018, 05:22 PM
#5089
Rennlist Member
01-03-2018, 05:27 PM
#5090
The EGR is a problem on the 6.0PSDs that don't get run hard. Drive them like a truck (work hard, tow frequently, etc.) and they generally hold up ok.
01-04-2018, 04:26 PM
#5091
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Wow. Those are pretty bad horror stories. I've not experienced anything like that but our low temps are not in the 30's yet. The lack of turbo boost (i.e. torque) sounds odd, I'd return to the fixing dealer and have them check the boost system. What you have described sounds much like what I experienced last winter when my boost hose became cracked (it did throw some codes too). Zero power. Once it was replaced, everything was normal again.
01-04-2018, 05:06 PM
#5092
They're trying to heat up the catalyst as quickly as possible. I bet most of the "cheating" was in cold start and cold running conditions (which is typical for most diesels.) Catalysts only work when hot so the sooner you can heat it up, the sooner it starts working, and the sooner emissions are lower.
01-04-2018, 05:55 PM
#5093
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Wow. Those are pretty bad horror stories. I've not experienced anything like that but our low temps are not in the 30's yet. The lack of turbo boost (i.e. torque) sounds odd, I'd return to the fixing dealer and have them check the boost system. What you have described sounds much like what I experienced last winter when my boost hose became cracked (it did throw some codes too). Zero power. Once it was replaced, everything was normal again.
They're trying to heat up the catalyst as quickly as possible. I bet most of the "cheating" was in cold start and cold running conditions (which is typical for most diesels.) Catalysts only work when hot so the sooner you can heat it up, the sooner it starts working, and the sooner emissions are lower.
01-04-2018, 06:59 PM
#5094
Rennlist Member
Back to the dealer the other day for a test drive with my tech who said I’d know best if torque and boost were lost. He did diagnostics on the boost and detected no loss of power. As a matter of fact he was able to have the beast jump 3-4 inches forward while being tested in a stationary position. He said all lips were mum when given the software package from corporate to install other than saying 1 could use up to 50% more add blue. He had no clue, zip, zilch, nada on what’s in the software update. She has more pep now than a regular Cayenne and less than before the fix.Too boot, being stuck in 3rd while she warms up is to me anyway a bunch of bs. I was advised to log a complaint with corporate.
But a quicker warmup means that in addition to all the systems being cleaner (that's the theory, at least), you'll get heat faster, too!
01-04-2018, 08:33 PM
#5095
Banned
Regarding the additive, it might be due to the way the cars were tested (I’ve seen exclusively here in Cali) with our Premium diesel as opposed to everyone else’s. Now I understand it to be more dependent on cold start or when engine isn’t up to proper temps that Cetane comes into play. But I’ve got to wonder that in these TDI motors, more Cetane is better. Our diesel is about 8 pts higher than just about everyone else’s.
01-04-2018, 09:24 PM
#5096
Three Wheelin'
I agree with your analysis. I have a 2016 unpunched CD with about 400 miles on the clock. When the engine is cold (overnight lows of below zero) even after five minutes to seven minutes of warmup, all gears shift smoothly but have observed when on third gear, it stays there up between 2,500RPM to 2,700RPM (depending on coldness of engine) before it shifts to fourth gear. When the engine is fully warmed up to 200 degrees, everything shifts smoothly on all gears. Haven't used any additives yet. Hope this helps.
Drive safe,
GT3RS-Fan1
Drive safe,
GT3RS-Fan1
It's not stuck in 3rd, just delayed shifting to 4th (or 5th), but it will shift at higher speeds. And it seems that when it does shift up, it stays in that gear even if you slow down some. It seems to me that in high 30s/low 40s, it's a matter of about 5-7 minutes of this delay. I don't see the big deal, given nothing else has changed (haven't had to refill adblue yet, though).
But a quicker warmup means that in addition to all the systems being cleaner (that's the theory, at least), you'll get heat faster, too!
But a quicker warmup means that in addition to all the systems being cleaner (that's the theory, at least), you'll get heat faster, too!
