leave the 4 vacum hoses on

[mtnmike]

Should I leave the 4 vacum hoses that come off the throttle body OFF or ON Plug them up or put new color ones on ? Does it have an impact on emissions and performance on the way the car runs ?

 

[rush2252]

Should I leave the 4 vacum hoses that come off the throttle body OFF or ON Plug them up or put new color ones on ? Does it have an impact on emissions and performance on the way the car runs ?

Yes it affects emissions. Yes it can/will affect performance if you leave them off. If your removing them cap them off or youll have a boost/vacuum leak. If you have to pass smog leave the emissions alone or you wont pass. The vacuum lines are for emissions purposes

Kolby

 

[Defiant]

Removing DSM emission equipment provides virtually no performance gain. Vacuum lines are usually removed only to reduce engine compartment visual clutter. Leaving the hood closed works even better.