Yep, that's right. The possible change I mentioned earlier won't work because the AMM won't see a change in flow.

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References

Sorry to interrupt your turbo discussion. I just wanted to give a follow-up on my mod on the non-turbo. No problems after about 1500 miles. Performance seems smooth, no loss of power in any range, and mpg about the same. Observation of the EGR Valve reveals that it opens at idle and when engine is cold started. Above about 1300-1500 rpm it closes and seems to stay closed when engine is reved above this (don't know if it stays that way at upper end). No cel. Rechecked the intake and it is staying clean as expected. I did not clean the intake flutter valves, as they were working fine, but will probably do that at a later date when the spirit moves me. Any comments from the others who made this (test).

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hlg

I did clean the main intake valve and the air temp sensor.

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hlg

Any followup on this project? Has anyone had codes generated by this modification. I'm motivated to do this after cleaning out tons of goo and carbon from my resonance pipe and Intake manifold this weekend.
Would capping the EGR valve serve the same purpose?
Steve 1996 E300D 99k miles

The hell are you waiting for? The mod is extremely easy and nothing special is required besides fabricating a blocking plate and a piece of 3/4" heater hose, sliding one end into the EGR tube until it is snug and having a breather filter from PepBoys or the likes on the other.

The other thing you should be interested in to elliminate the gooing in the intake is by performing the elephant hose mod. With the EGR re-routed and the elephant hose in place, you will never have to clean your intake manifold again...

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#dieselFLEET
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'97 E300
'99 E300

What's the elephant hose mod?
Have any codes been generated by the EGR mod?
The car is new to me, 10 days!
Steve

No Codes, No Goo, No Excuse Not To.

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a2


1978 280 CE silver
1986 560 SL black
1987 300 SDL cream
1994 SL 500 brilliant green
1997 E 300d dessert silver
2005 FORD F250 Superduty Crew cab 4x4

____ADMU____

Will this cause any issues with the emissions inspections for 1996 and newer vehicles by the People's Republic of New York that were just instituted?
Could I just insert a solid spacer in between the EGR valve and resonance pipe?
Thanks for all of the advice guys!
Steve

Keep it simple pimpin'

Do as is decribed throughout this thread and you are all set.

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#dieselFLEET
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'97 E300
'99 E300

OK, I wanna do this. My car goes in to the mechanics on Wednesday because of a CEL idiot light that has been going off intermittently for 6-9 months. Autozone said there's an EGR problem but that I should get MB to look at it. Either way, I'm going to get the IM cleaned while it's in the shop as its got 134K on the odo and is probably a mess.

I'm moderately mechanically inclined but I've never even changed my oil and am a bit nervous playing with my engine. How hard is this and what can I break if I screw it up? Obviously my mechanic won't do it but it looks like it would provide a significant performance increase which is very intriguing.

Deuce

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Deuce
'02 CLK430 (Nightwing) 54K
'11 ML350 109K
'21 VW Atlas (Wife's Rocket)
'94 Bronco XLT (Son 1)
'06 Honda Odyssey 180K (Sold)
'02 E320 151K (Sold)
'96 E300D (RIP Riggo - 12/16/2010) 198K
'03 Honda Odyssey 34K (Sold)
'95 E300D 145K (Sold)
'01 Mazda Tribute 19K (Sold)

Well, with all the debate on if the egr mod will work for the 606 turbo, I decided to try it. I am glad I did because it put things into perspective for me. I took off my intake and disconnected the egr tube and bent it aside. I put the intake back on and started it up.

There is quite a bit of exhaust pressure coming out of that tube even at idle. Giving it a bit of pedal and it really increases. I see now how it combats the boost pressure.

So I plugged up the tube and let the egr valve suck fresh air. I did not even get out of my cul de sac and the check engine light came on.

It made total sense to me. The sensors are use to sensing exhaust pressure entering the intake and fresh air does not even come close to mimicking it on the boost side of the intake. Plus I did hear the boost coming out the egr valve which I never heard before.

So Rick, you are definately right!

I had thought about routing crankcase gases in place of the exhaust gases but the pressure is no where near that of the exhaust pressure. So that is out.

If we are going to be sucessful at disabling the egr on the 606 turbo I believe we are going to have to do some type of condition mimicking to fool the sensors with the egr valve remaining closed.

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-disav

99 E300 TURBODIESEL Astral Silver 282K - AMG brakes, suspension, monoblocks, speedo & interior - Full Load Maxed on IP by custom Speed Tuning USA Chip - T3/T4 Garrett - EGR/MAF delete
98 E300 TURBODIESEL Alexandrite Green on black leather 289K
95 E300 DIESEL Green Queen 267K SOLD
84 300D 216k SOLD
87 300D 299K #22 head - intercooler - full load adj. - 8sec 0-60mph - SOLD
76 300D 214K SOLD

As long you you elliminate the CCV gases from entering the intake system, there should be no problems of gunk building up in the intake system and EGR.

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#dieselFLEET
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'97 E300
'99 E300

Venting CC gases to the atmosphere is stinky in the cabin, is it not? Or do you have some other way?

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-disav

99 E300 TURBODIESEL Astral Silver 282K - AMG brakes, suspension, monoblocks, speedo & interior - Full Load Maxed on IP by custom Speed Tuning USA Chip - T3/T4 Garrett - EGR/MAF delete
98 E300 TURBODIESEL Alexandrite Green on black leather 289K
95 E300 DIESEL Green Queen 267K SOLD
84 300D 216k SOLD
87 300D 299K #22 head - intercooler - full load adj. - 8sec 0-60mph - SOLD
76 300D 214K SOLD

You hit the nail right on the head. It's the change in manifold pressure that lets the ECU know that EGR is functioning. If you can figure out a way to mimic manifold pressure (with respect to EGR operation), your experiment will be a success. Good luck

Then there's another potential problem.

EGR limites NOx by introducing inert gas into the system. Those with older engines who block off the EGR valve do not have catalysts in their exhausts. We do.

Even if you ignore the smog problem if everyone were to do such things to their cars, are there potential problems for the catalysts? That part is expensive enough that cleaning the intake once in a while seems cheap.

Sorry, guys, but I'm not experimenting with my EGR setup.