R rudy bal New Member Apr 24, 2013 #1 Apr 24, 2013 #1 a knocking valve (intake and or exhaust) is heard while driving but not during stationary on my 2003 corolla s.
a knocking valve (intake and or exhaust) is heard while driving but not during stationary on my 2003 corolla s.
R rudy bal New Member Apr 25, 2013 #3 Apr 25, 2013 #3 been driving since 1969. it's not a fuel knock. seems like it is the timing or the firing of the plugs are either advance or retard. can hear it during acceleration. i am interested in knowing the variable valve timing.
been driving since 1969. it's not a fuel knock. seems like it is the timing or the firing of the plugs are either advance or retard. can hear it during acceleration. i am interested in knowing the variable valve timing.
A aerialphoto7 New Member May 7, 2013 #4 May 7, 2013 #4 Knock sensor or cheap gas, maybe I run ethanol free from time to time and have no issues.
