| Re: So My Car Failed Emissions... |
Subject: Re: So My Car Failed Emissions... by CentralCoaster on 2009/5/15 6:54:29 The exhaust backpressure is necessary to bleed off EGR vaccum to let it close. If the computer turns off vacuum to it but it still holds, then it will throw a code. I can't help but wonder if putting a small hole in the diaphram would've solve that, yet still allow the engine vacuum to open the valve when the solenoid is on? The EGR temp sensor is used to detect flow (heat) passing through the EGR, basically acts a feedback to the computer if I recall correctly. I'm not sure how you can tweak the NOx without the EGR. Overlap could work, but I'm not sure how else you'd drop combustion temps. |
