View Full Version : CEL : improper airflow SAP
DDAMANTI
07-13-2013, 08:41 PM
2000 Audi a4 Avant 1.8t - 140,000 miles
Ok So several months ago I had to replace my front end
SAP
Support
Rad
Condessor
Bumper
Ac lines
Never before did I have this CEL.....Now I have it...Im stumped on why
SAP is hard wired in and working/turns on
None of its lines are blocked/clogged
Egr was removed and cleaned out
I did not find any vac leaks so far
Please can anyone give me tips? Walk me through trial/error to find the issue?
elewsader
07-13-2013, 09:19 PM
read me (http://forums.audiworld.com/showthread.php?t=303096)
DDAMANTI
07-13-2013, 09:36 PM
This is awesome...i will do all this tomorrow....Am i correct to think kombi valve is the EGR valve?
DDAMANTI
07-13-2013, 09:40 PM
nevermind!!! lol
http://forums.vwvortex.com/showthread.php?876611-Is-there-a-difference-between-Combi-Valve-and-EGR-Valve
Steve Chicago
07-14-2013, 04:57 AM
Many people (and parts sellers too) call the combi-valve an EGR valve. It is not an EGR valve. An EGR system Recirculates a metered amount of Exhaust Gas back into the intake side to help reduce certain emissions. The combi valve opens/closes the air path used by the Secondary Air Injection system. Two completely different systems that do two completely different things.
Both are emissions systems and most people aren't interested in understanding the emission systems.
DDAMANTI
07-14-2013, 10:48 AM
Ok so i removed the valve...washed it with brake kleen...replaced the vac line thatrun from valve to under intake mani....no other lines are obstructed. I will clear code again today and give it another go. See you guys then lol
DDAMANTI
07-14-2013, 11:10 AM
Will any Combi valve work?
http://www.ebay.com/itm/1998-2004-Audi-EGR-Combi-Valves-Fits-Many-Models-078-131-101-/190858920752?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c70140330&vxp=mtr
DDAMANTI
07-25-2013, 09:03 PM
Ok so I have swapped out the Combi Valve...replaced the Secondary air pump.......Checked to see if the pump actually works.....run the car for three days with no check engine lights....and BOOM! Check engine light for incorrect air flow - Secondary Air Injection...... - .- ......WTF!!!! I am so confused. Does anyone have an stock ECU flash that eliminates emissions ? Im Fed up!!!...I am two months over due for inspection and I can not get it inspected with a CEL!!! HEEELPP PLEASE!!