2004 Porsche Cayenne S Q&A

2004 Porsche Cayenne S Question: what could cause my porsche from starting after i have replaced the old battery

the car displayed engine battery so i replaced the old with new one. But then it won't even kick or start. This has happened before but when i changed the battery it started immediately. At a time too it was giving had start. Please advice -
Answer 1
here is a Porsche PIWIS-2: http://www.autosuning.com/porsche-piwis-tester-ii.html so that you will be able to check if your car works well any time. -