2020年11月15日 · In Layman’s terms, the N249 is a valve solenoid that is connected to the intake vacuum source to the back of the diverter valve (DV) and it controls the boost signal to the DV …

2013年12月27日 · N249 helps smooth things out when driver changes loads e.g. letting off a little 90% pedal to 80% pedal. The car responses faster to driver's request with the aid of the N249.

2008年4月1日 · Doing a DV direct to manifold (N249 bypass) is a huge help for response out of the car, N75 or MBC makes no difference. It opens every time the manifold sees vacuum, and makes noise every time.

2011年5月25日 · The N249 valve controls the opening of the diverter valves under certain part throttle conditions where the ECU thinks the intake track requires recirculation.

2005年4月8日 · PROs: By removing N249 valve, you can prevent this bad habit of the ECU, and by removing N249 valve, you are removing an approximately 2mm narrow bottle neck restriction (ID of the N249 valve) in the line to the DV, which will result in a somewhat faster DV response.

2010年5月20日 · There are slight variations in the vac lines, but the instructions indicate which motor is in the picture. If I am missing anything, please let me know. I will make you a kit if you are interested. PM me for details.

2004年9月21日 · By removing the N249 you are reducing the speed that the control system can react to a potential overboost condition (as it only can use the slower N75) but you gain in dump valve response when lifting off the throttle/changing gear.

Many people delete the N249 system on the Mark I Audi TT because it gets rid of the bunch of hoses that are located in front of the engine, leaving you with a tidier-looking engine bay. You should also still be able to pass emissions without it.

2012年4月11日 · The SAI system has a valve clled the N112 valve, or the SAI combi valve, which controls air flow into the cylinder head via the SAI pump. The EVAP system has a valve called the N80 valve which controls fuel vapor flow to the EVAP charcoal canister.

This is the basic kit that will delete your entire SAI/N249/EVAP system for any Mk4 Golf/Jetta 1.8T. Kit includes all the hoses, caps, clamps and plug-n-play resistors to delete the SAI/N249/EVAP system. ( The secondary airflow code can only be defeated with software). NOTE: This kit retains the OEM PCV system but is u