Bad Infiniti Knock Sensors?

jfachatz
Thu, 05 Nov 2009 23:08:41 +0000
Maintenance/Repairs

I am a tinker and removed my '99 Infiniti Q45’s drivers headlamp to repair a crack. In the process I removed the air filter box and several items surrrounding it all with the battery disconnected. One item I had to move was a short braided wire running from the side of the engine to the chassis. When reconnecting, everything went fine, but I had to make a guess as to where the braided wire connected to the inner fender wall. It looked good until the Service Engine Light came on after a couple of days. The shop that changes my oil pulled up the ECU codes for me, they said both knock sensors on either side of the V8 were bad. My questions are:

Could the braided wire going to the wrong place cause a temporary and hopefully reversible change in what the ECU sees as a problem?

If I hadn’t disconnected my battery, could I have ruined my knock sensors?

When I do get this settled and my engine is performing happily with it’s knock sensors, will my mostly highway driving MPG improve?

Thank you!?

6 posts - 4 participants