Swirl patterns left by GT 300

[waterboy]

Anybody ever see intermittent swirl patterns left by a Mark 7 gt-300. This problem comes around in Feb. every year. I tried changing nozzles, changing presoak titration and increasing pump pressure. It does not happen on every car. Any help would be appreciated, thanks.

 

[Bill Manke]

Where on car are the swirls side, top, front, back? Do the nozzle appear to be slowing up? I have had wax build up and slow the nozzles and then they clear. Also is your travel speed up high?

 

[waterboy]

Thanks Bill

Thanks for the reply Bill. The swirl patterns vary as far as location, sometimes on lower rocker panel, sometimes in the middle of the door and sometimes in both locations. The hood , roof and back of the vehicle dont have the swirl problem. Wax only comes out of the top boom so I dont think thats the problem. The GT 300 has four speeds for the gantry, it is set on the second speed ( the first speed is the lowest ). I tried setting it on the slowest speed and it still had the swirl patterns. Thanks.

 

[Waxman]

maybe a problem due to cold temps? are the cars icing up at any point during the wash?

 

[waterboy]

spot free valve sticking

thanks for the replies. looks like the spot free valve was sticking intermittently causing low pressure.mike