How to verify that knock sensor and evap pure valve were actually replaced? They do not appear to have been on my 82 year old mother's 1997 Maxima GLE..
While RnRing the starter yesterday, I noticed that the knock sensor and Evap Purge
Valve look OLD. They were allegedly replaced about 3 weeks ago on my 82 year old
mothers car, 1997 Nissan Maxima GLE.. She paid Cash according to Invoice... Paid
good $$$.. The car runs worse now than it did. Any suggestions? Thank you in
advance for your help/advice...