This sort of knocking can be caused when the engine runs too lean. You should be able to watch the O2 sensors oscillate between .2v and .8v after they're fully warmed up using a cheap DVOM.
See http://www.forparts.com/o-21.htm for a good diagnostic procedure. --Geoff On 3/28/07, Raqoon <[EMAIL PROTECTED]> wrote: > > I have a 93 Intrepid ES, 3.5 engine. > > When I've been driving it for awhile....say a half hour or so, its > good and warmed up, I will get alot of pinging in the engine. I'm > using the correct fuel (89 Octane) car is not overheating as the > gauges are all where they should be and the coolant is fine, car has > had new radiator, waterpump, thermostat, plugs are good, wires have > been replaced in the past, fuel filter replaced...doesn't seem to be > any loss of power...I am wondering if this could be a sign that the o2 > sensors need replacing. The last time I took it through emissions, my > Nox levels were getting close to the maximum, even thoguh the car has > had a new catylitic converter put on it, and had just had the plugs > changed. > > Any ideas? Car has 250,000 km's on it. > > Thanks Web: <http://groups.yahoo.com/group/dodge_intrepid> Subscribe: <mailto://[EMAIL PROTECTED]> Unsubscribe: <mailto://[EMAIL PROTECTED]> Moderator: <mailto://[EMAIL PROTECTED]> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dodge_intrepid/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dodge_intrepid/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
