Shoe Guy

OK - I think I'm resolved to hunting for a vacuum leak. I pulled VAG codes and have no codes, so I'm assuming that the cruise components are fine.

I've searched the forum and only find Non DBW cars and APR chip info. So I'm looking for a diagram of where the actual cruise components are and where the vacuum lines run. I just need to know where to start guys.

thanks,

Audi4orce

It can be the chip, dirty switch or a dead switch

BoostTed

mine stopped working for a day or so but next day i got in the car and it worked again.

QuiksilverS4

Most likely the switch. Many have had them replaced.

SOLD2000-1.8TQMSport

also if the clutch pedal is not fully disengaged the cruise will not work

Audi4orce

That's a new one...<added to the list>

red_pOrtlAnd_A4

So I can only cruise with the lows. Boo.

DMAudi

When mine had this problem, Rusnak Pasadena went the extra mile (literally!) to figure it out.

Basically the cruise would just disengage randomly when I was driving. ('98 A4 2.8qms)

Anyway...

They replaced the switch first. That did not fix it. They replaced the switch again. That still dod not fix it.

Johnny, my service writer, suggested that they could have their tech take the car home and back to work again in the morning, to see if he could encounter this intermittent problem. So, he managed to duplicate it, and after still more diagnosis, they found a bad cruise computer and bad vacuum hose.

Did I mention Audi Assured warranty rules? $50 out of pocket for all that work, on a used car with over 80k miles on it??

Thumbs up to Rusnak Pasadena and Johnny Borja for fixing this very irritating problem.

s4master1

e-mail me a picture of the screen when you go in engine with the vag where is the coding and part numbers

A4 Invested

just shoot me an email so I can explain the whole situation. Mine was the connection between the throttle body and vacuum diaphram.