Search found 2 matches

by tcp2150
Wed Jun 22, 2016 6:38 am
Forum: Problems & Warranty Issues
Topic: 2009 Vibe 2.4 pre-ignition spark knock
Replies: 8
Views: 4146

Re: 2009 Vibe 2.4 pre-ignition spark knock

Test it's only under light throttle. Yes it only last for a second..... but now it's starting to do it with premium fuel too!! Creepy!! I wonder if it's running lean due to out of spec O2 sensor. Fuel pressure regulator?? It seems lean and therefore too hot up top. Fan coming on a LOT more than it u...
by tcp2150
Thu Jun 16, 2016 6:41 am
Forum: Problems & Warranty Issues
Topic: 2009 Vibe 2.4 pre-ignition spark knock
Replies: 8
Views: 4146

2009 Vibe 2.4 pre-ignition spark knock

Bought this car new. Maintained it VERY well. 2.4 automatic. Hot Temps outside and regular fuel I am hearing clearly some spark knock or pinging under load at low speeds. If I hit the gas it stops. Doesn't do it at higher RPMS and does it a LOT less when I run premium fuel. I have tried: 1. GM upper...