"EGR DELETE" Instructions

He does say something like I "go up one side and down the other" of @NutzAboutBolts , regarding his EGR video. I hope I don't come across like that; that'd be like tugging Superman's cape, stepping on you-know-who's blue suede shoes. The @NutzAboutBolts guys are a godsend.

 

most of his comments are tongue-in-cheek i think.

"this isn't your latest colonoscopy"

"margie, put that on ebay for 3 cents"

what a great voice too, made for documentary narration

 

I would do an egr delete if it did not bring up a check engine. Which then partially masks off other issues. Maybe if someone programmed a $30 P10 scanner to monitor (which it can) and then delete that code while it displays coolant temps...



PS: Priuschat has become the modern way for old men to sit around the neighborhood Diner telling each other stories...

 

yep, i resemble that remark . but disagree with 'has become'. seems like it's been this way for the last 18 years, at least.
chat is chat

 

Delete the P0403, though, and you're inviting detonation and consequent engine damage, for as long as it takes for the code to be detected again. The code is what reminds the ECM "right, no EGR, go easy on the timing."

As a practical matter, though, because P0403 is detected by a pure judgment of electrical continuity through the valve motor, it takes not long at all to detect, and a scanner trying to keep it deleted would be busy all the time.

 

so if i disconnect the power, the engine light should come on and the car shound operate properly again if the problem is egr/manifold related?

and when i reconnect the power for inspection, the light should go away?

 

I have a 2011 Prius with 89k miles on it. The obd app shows a good egr flow at around 20kPa consistently.

I tried the egr delete and following is my observations:

Before egr delete I drove 13 miles of highway and streets and had a mpg of 57.
Then I did the egr delete. It showed the check engine light and my obd scanner iphone app showed the code P0403.
After egr delete I drove another 13 miles on the same route and got a mpg of 58.
The driving experience did not feel any different.

I feel the egr delete would be a great option for my prius since the egr flow is still good and I can stop the egr clogging progressing any further.

Please advice on the implications for following plan:
1. Keep the prius in egr delete.
2. Since the engine light is always on, Check the obd codes, every time at gas fill up to make sure there are no other engine codes.

 

I’ll just cut to my bottom line: EGR clean.

 

Come on, he is right except the egr flow will go bad when it does a periodic test. Still I would not want a check engine light up all the time when a five minute overheat could kill the engine. People respond to a check engine light better than one of the others they never see or read about.

 

i traded it in. solved a lot of gen 3 problems in one quick stroke