I have posted this over in the mkIV forum as well so if you have already tried to help thank you.
Basically everytime my car goes hits approx 4,000rpm at WOT my car throws the code 17705: Pressure drop between turbo and throttle body, check DV.
This is both with my upsolute chip and standard chip. Has anyone else had this?
If I disconnect the maf sensor it runs fine but obviously the MAFR's there for a reason so would like a proper fix for this. Also traction control doesn;t work with the sensor disconnected.
It's been back to the dealers to have it fixed but all they did was clear the codes and kick it back out the door. Because of the chip and other warrenty work I am having carried out I am a little reluctant to keep returning it to the dealer.
Can anyone tell me how to test the MAF to see if it's that that is whats bad?
Many thanks for you help
I'm not positive but to me it sounds like you need a nw diverter valve if there is a pressure drop there it may be that the valve is leaking, it is a very comon problem and I suggest you get a Bailey valve http://www.awe-tuning.com
Cheers for the response Mike,
I should have added into my original post that this is with a new revision standard DV which is a known working one (I havea friend with a non DBW car) and also with my Forge valve as well.
Is the DV in securely and seated cause if it isi not and boost is escaping you'll also get this error. Maybe Andy wolfsburgh de or Chris chris 86vw can chim in and help, if not send em an IM they're both very knowledgeable
Re: Help: Car keeps throwing a 17705 error - . (VWMike81)
It is possible it is the MAF sensor. Apperntly accordign to VW the computer compares MAF and O2 readings along with boost to see if everyting is runnign ok. If say teh amoutn of fuel the car asked for doesnt' agree with what the O2 sensors are sayign was mixed, and the boost is "right" it may cause a code that the car thinks it may have lost boost, it is just a safety.
I would look into the MAF personaly. If I rememerb correctly there was a bulletin on this at the dealer when I was there, not sure htough.
chris [email protected]
Re: Help: Car keeps throwing a 17705 error - (hman)
another one that's a PITA and some people have had problems with is the first soft pipe which connects the IC pipe that the DV is attached to the Lower IC pipe. There is a clamp there that has leaked and is pretty bad.
Do you have access to an air compressor? I can tell you how to find out if your getting a leak. It's the intake system tester I posted Diagrams for before. I'll try to find pictures. I guess you could use a bike pump or a car tire pump possibly to work.
Re: Help: Car keeps throwing a 17705 error - . (Roy1.8T)
quote:[HR][/HR]I'd also add that the leak could be *anywhere* between the turbo and the throttle body...check your clamps, check your hoses (especially around the IC), etc...one of them might be loose.
That would be my first guess as well. This is basically what the code itself is suggesting, although the DV would cause this also.
Re: Help: Car keeps throwing a 17705 error - . (dbrowne1)
Thanks a lot everyone for the replies, I'm gonna try and strip down the pipe work from the turbo this weekend if the weather holds out. If I don;t get any joy with this Rodney I'll email you if thats ok for instructions on how to pressure test. I don;t have access to a compressor but I'm sure I can find another way to pressure the test device.
Thanks again everyone for your help, greatley appreciated.
Re: Help: Car keeps throwing a 17705 error - . (chris86vw)
Yeah do it first hard pipe after the Turbo and plug the hose going to the Throttle body with a wd40 can or something. DON'T USE A PAINT CAN. I can just picture someone getting the can shoved intot he intake and spraying grey primer all over their car.
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