2004 Passat Deleted EGR now have MAF issue

[toolmangary]

I deleted the EGR on my wife's 2004 BHW, used block off plates and removed the cooler. When i started it up the transmission instantly when into limp mode (gear LED fully lite up) and set P1857 code - Load signal fault signal from ECU, and AllData says check MAF. Checking the MAF in data stream with my scanner, MAF has a target of 340 mg/s and actual of 455 mg/s.
So I'm guessing that the ECU must figure in the EGR flow at a idle because the MAF can't see the EGR flow because the flow is not going through the MAF. Now that the EGR is deleted, 100% of the air flow goes through the MAF
Does that make sense??
I can clear the code and as soon as I start the engine the P1857 code comes right back. I did check the carpet around the transmission control module and it is dry. I also tried a different MAF and it didn't change anything.
Do I need to get the ECU tuned and have the EGR deleted from it? If so what is my best option to have the tuning done, what tune? Sending the ECU to somebody isn't problem.
I've deleted the EGR's and coolers from other diesel engines before and never had a problem, even without a tuner.
Any thought, ideas, comments?
I need to fix this so my wife isn't driving my truck,
Thanks

 

[toolmangary]

Before I deleted the EGR I installed a EGR gasket (OEM VW) with a small 1/4" size to restrict flow but that would set the low EGR flow code fairly quick.
One thing, I'm not getting the typical MAF codes, P0101, P0102. That code I'm getting (P1857) is kind of a odd code, and like I said it sets seconds after start up and the trans go into limp mode.
In the next couple days I'm going to go through AllData's procedure for the code and see where that takes me. But I'm thinking it's going to need to be tuned. So I need to figure out a plan for that.

 

[vwztips]

Start with just putting the EGR valve in and plug it in. If it is setting a fault before starting it is looking for a hand shake with the EGR valve to see if it is there and functioning.

Yes I have experienced automatics going into limp mode with an error message of something like "missing load signal from ECU"

Also if you want to fix that electronically, I have great success with Mike at TDTuning.

 

[toolmangary]

Start with just putting the EGR valve in and plug it in. If it is setting a fault before starting it is looking for a hand shake with the EGR valve to see if it is there and functioning.

Yes I have experienced automatics going into limp mode with an error message of something like "missing load signal from ECU"

Also if you want to fix that electronically, I have great success with Mike at TDTuning.

I did plug the EGR back in, and it still has the same problem.
So I'm thinking the next step is to have it tuned.

 

[vwztips]

In my experience, after clearing a fault, if the code comes up immediately with key on or start up, it is typically an electrical fault. In this case, your engine would need to cycle several times to make sure the fault is an actual fault.

If after clearing the fault (with the engine is not running) and the fault comes right back, it is definitely electrical or sensor related.

 

[peiphil]

why not just put a new egr valve and be done?
They are there for a reason!
The coolant hoses add a lot of heat to your heater in winter time.
No codes and nice warm car just saying !

 

[toolmangary]

I thought I'd update this tread. I finally figured out the P1857 code, it was the connector on the coolant temp sender, some oil had leaked from the vacuum pump nipple causing the orange seal in the connector to swell. With the swelled seal in the connector it wouldn't snap/lock in place, so I just took it out for now and I'll get another connector from the U-pull it yard.

 

[owr084]

I thought I'd update this tread. I finally figured out the P1857 code, it was the connector on the coolant temp sender, some oil had leaked from the vacuum pump nipple causing the orange seal in the connector to swell. With the swelled seal in the connector it wouldn't snap/lock in place, so I just took it out for now and I'll get another connector from the U-pull it yard.

Get a NEW coolant flange and seal too. The seal in the coolant flange does the same thing as the sensor gasket. It then breaks and starts flapping and wearing away the flange.

 

[Btravelen]

I seriously doubt if these EGR's function without being strapped down during emissions testing. Did you observe it when you did the delete? They clog so badly with soot that it's pretty apparent that they are'n't operating. And they don't trigger a CEL when they're solidly clogged.

I pulled mine several thousand miles ago and observed this. I cleaned it anyway and haven't pulled it since. I thought it was odd but dieselgate broke, it made perfect sense.