The Lambda system, including the frequency valve, is powered when the key is on no matter if the motor is running or not. You probably should have your fuel injectors cleaned and tested. The pressure you feel when you push on the air sensor when the fuel system is pressurized is the control pressure. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Matt Spittle" <supermatty@xxxx> wrote: > > > Forgot to add something to my last message. When my car's fuel > system is fully pressurized, it takes about 3 to 5 lbs of force to > depress the air metering plate. Is it supposed to be like this? To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/