Wipers start before washer jets spray

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VeeFource

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Does everyone else's wipers start going before the washer jets have sprayed the windscreen when doing a wash/wipe?

Find it hard to believe Audi would be daft enough to have their cars smear road grime over a dry windscreen before the pump kicks in so wondering if there's something wrong with my pump. I guess if it's a positive displacement type and not sealing very well then it could allow the fluid to drain back into the tank after using it, which mean it's having to prime the lines every time and would explain the delay.

It's not doing my wipers or screen any good so would be great if there's a fix.
 
Unless you have grit or stones on the screen, which usually wouldn't scratch as they're too big to wiper across so they'd just roll off, then screen shouldn't be affected tbh, sometimes the jet heads or bit blocked & causes a delay, stick a needle or pin head in them to clean, often happens especially the rear, be careful as most have a ball bearing head & cleaning often changes there direction of jet, generally doesn't bother me &I just hold it of flick the stain a few times, wipers should be fine for years tbh, if they're originals, if get some new ones, I had mine on the car for about 14 years lol, changed them about 2 months ago & wow the difference.
 
Fine dust does scratch unfortunately, same reason you get swirl marks if you were to rub the paintwork down without washing if first. Glass is much harder wearing than paintwork of course but over time you'd still get the grazing as you do on high mileage cars. Only my car had that at 15k miles thanks to the jets not firing early enough and took a good amount of polishing to fix. Never had this on any other car either.
 
That's bizarre, never had glass damaged due to delay in jets firing, worked on allot of cars & I've only ever seen when a wiper blade failed once about 26 years ago on a montego I had.

How long of a delay are you experiencing as it would have to be substantial to allow damage you're advising.

Clean the jets & maybe flush the jet lines from the pump.
 
The jets don't kick in till the wipers have pretty much already reached the top of the screen. All the other cars I've ever driven have had the jets fire before or at least at the same time the wipers start going
 
You could check with vcds of there's a setting to change for when to spray, strange one that unless the pump has some build up not corrosion on the contacts, so it's not getting good conduction immediately.
 
NHN said:
You could check with vcds of there's a setting to change for when to spray, strange one that unless the pump has some build up not corrosion on the contacts, so it's not getting good conduction immediately.
Click to expand...
Couldn't see any options for it in VCDS sadly. I don't think it's a contacts problem or I'd expect the pump to be more intermittent. There's just a consistent 2 second delay from pulling the lever to getting any spray
 
Check the relay is pushed home fully, try Dremel brush on the relay pins & associated pins & connectors on all points.

I had this happen to me on a lift pump, relay wasn't home & some build up on points, worked ever since perfectly.
 
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