Recently purchased an 02 pd130,decided to do a bit of housekeeping and clean the egr valve,while taking it off i heard a hiss sound come from the vacuum solenoid,1 of the clips was loose,put it back on,cleaned the egr and put it all back in,now the car feels dead & seems to be going into limp mode wen i hit 60,could this be to do with the vacuum,there are no lights on the dash