"leaning" with EGR or air? - Page 2 - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 07-05-2008, 07:01 AM   #11
Registered Member
 
GasSavers_Erik's Avatar
 
Join Date: Nov 2006
Posts: 1,027
Country: United States
usedgeo- I think your car may have died because it went too rich. By feeding exhaust in through the air cleaner, the computer thought that it was air and mixed in the appropriate amount of fuel.

It seems easy for a car with a MAF sensor to use EGR and adjust fule injected- just insert the EGR downstream from the MAF.

How do Fuel injected cars that use speed/density calculations compensate for EGR? Is that what the EGR valve position sensor is for?

One more unrelated thought- how about applying vacuum to the altitude (barometric) sensor to trick teh ECU into going lean? Or using a resistor/modifying the output voltage of this sensor?

I hooked up a vacuum gauge to my EGR valve vacuum hose and put it on the dash. the vacuum readings indicate that it would be perfect for a lean burn type system. Vacuum was highest at cruise, zero at idle and would decrease as you gave it more than 40% throttle, going to zero when you had it floored.

I was thinking that I could rig the EGR vacuum line to either let in air or more EGR. Possibly the EGR vacuum could open a sizable EGR "leak" to manifold vacuum.
__________________

GasSavers_Erik is offline   Reply With Quote
Old 07-05-2008, 05:07 PM   #12
Registered Member
 
ShadowWorks's Avatar
 
Join Date: May 2008
Posts: 172
Country: United States
Quote:
Originally Posted by Erik View Post
usedgeo- I think your car may have died because it went too rich. By feeding exhaust in through the air cleaner, the computer thought that it was air and mixed in the appropriate amount of fuel.

It seems easy for a car with a MAF sensor to use EGR and adjust fule injected- just insert the EGR downstream from the MAF.
The EGR is not feed into the intake before the Air flow sensor, its feed directly into the air intake manifold, this means air space in the cylinder is taken up with less air so the MAF detects the drop in air flow passing through it.
__________________

__________________
Water is fuel, I just don't know how to make it work yet.
ShadowWorks is offline   Reply With Quote
Old 07-05-2008, 05:22 PM   #13
Registered Member
 
GasSavers_Erik's Avatar
 
Join Date: Nov 2006
Posts: 1,027
Country: United States
Quote:
Originally Posted by ShadowWorks View Post
The EGR is not feed into the intake before the Air flow sensor, its feed directly into the air intake manifold, this means air space in the cylinder is taken up with less air so the MAF detects the drop in air flow passing through it.
Yes- I know this, I was just speculating as to why his Saturn died when he gave it a shot of exhaust gas into the air cleaner.
GasSavers_Erik is offline   Reply With Quote
Old 07-05-2008, 05:33 PM   #14
Registered Member
 
Join Date: Apr 2008
Posts: 1,259
Country: United States
Location: wiliamsburg virigina
Lack of oxygen.

regards
gary
__________________
R.I.D.E. is offline   Reply With Quote
Old 07-06-2008, 01:12 PM   #15
Registered Member
 
Join Date: Oct 2006
Posts: 303
Country: United States
Quote:
Originally Posted by R.I.D.E. View Post
Lack of oxygen.

regards
gary
Good point.
__________________

__________________
usedgeo
usedgeo is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 08:21 PM
Gallons per Mile? nerb Fuelly Web Support and Community News 1 11-12-2008 04:33 AM
Buford GA Noob GasSavers_rayjay Introduce Yourself - New member Welcome 0 04-18-2008 04:17 PM
Timing chain and FE bowtieguy Experiments, Modifications and DIY 22 11-11-2007 09:48 AM
Throttle spring...pedal vs RPM? ZugyNA General Fuel Topics 17 08-01-2006 05:17 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 09:01 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.