A4Twin

been having problems with car it sometimes doesn't want to turn on. it just cranks over, finally get the car to turn on but epc light comes on, only rev to 4K and it stumbles on itself. i turn car off and turn it back on light goes away and car runs fine. three weeks ago had same symptoms and had the "hall sender" and 2 O2 sensors changed seemed to solve the problem. found on other forums people have changed out the crankshaft position sensor and it seemed to fix the problem. where is the crankshaft position sensor? any DIY instructions
thanks

Tgr_Clw

Any codes?

A4Twin

no...

Tgr_Clw

So no CEL and no stored codes?

Matt Devo

sounds exactly like my issue, and replacing the CPS fixed it. Full writeup on AZ

A4Twin

is Crankshalf Position Sensor the same as camshalf position sensor or hall sensor. looked at all your post on AW and couldn't find it. thanks

Matt Devo

<ul><li><a href="http://www.audizine.com/forum/showthread.php?t=104097">writeup I used</a></li></ul>

A4Twin

thanks

A4Twin

just vag the car and nothing pops up