tibb100CSQ

This weekend I finally finished reinstalling my 12V in my '94 100CSQ after having the heads machined and replacing every seal on the engine. Now, I am getting an intermittent check engine light that gives the same code that I was getting before I removed the engine: 2341. From the FAQ, I was able to determine that it corresponds to CO before three way catalyst is greater than 1%.

It says that the causes could be an intake air leak past the MAS (just replaced all of those seals), incorrect fuel pressure, bad O2 sensors (just replaced), Leak in exhaust (just replaced exhaust manifold gaskets, but there is a slight leak where the manifold connects to the exhaust pipe), no gas (full tank), or EVAP canister purge regulator valve N80 sticks.

The car seems to run fine except when idling in drive after it is up to temp, there seems to be some shaking that goes away when you shift into neutral.

Anyone run into a similar problem before? Wher is the EVAP canister purge regulator valve? Any ideas would be helpful.

ringsX4

the n80 valve is located by the airbox. there should be about 2 other soleniod valves there too. the n80 will have an electrical connector and rubber vacuum lines- 1 coming in 1 going out. make sure all the vacuum lines are in good condition. they break alot and can cause many problems. if you have access to vag-com you can activate it with output diag and determine exactly which one it is. it will click when activated