I have been using the Hess station for the last year. So you think if I switch to one of these stations on the list the pinging will stop?
It is definently worth a try. I only use gas from the top tier list and have never had problems ever with any of my cars/trucks. I remember a long time ago my mom had a ford ltd and we were using clark gas and it was pinging and making all kinds of noise on acceleration and when we switched to mobil the noise went away. Gas companies use different detergents which makes a big difference. Keep us informed on what happens with yours.
Ok... So if it's defective the engine would ping and not retard timing ?
I wish I still had the thread. It was a common problem and replacing the KS was one of the fixes.
Yes, a defective knock sensor would allow for excess pinging. The OP said he gets pinging during acceleration and not cruising. No ping during cruising is good. The question I still have is does he get ping during norml acceleration or hard, full throttle acceleration?
Originally Posted by j0nx
Try another gas station. That's always step one for this problem. After that if it still does it then take it to the dealer. A 2011 should NOT be pinging. PERIOD.
To say the engine shouldn't be pinging at all is wrong. The powertrain control module will advance the timing during acceleration, especially hard acceleration. During hard acceleration (especially an engine with a manual transmission at low rpm), the knock sensor detects the knock or ping. If the ping exceeds the maximum amount the engineers deemed safe, the signal is used by the powertrain control module to retard the timing.
So slight ping under certain conditions is normal. I would wager alot of members here get some ping and never hear it because the windows are down/top is off or the radio is on.
During normal acceleration or when cruising, there should be no knock. Under hard acceleration, a small amount of pinging for a few seconds is normal, especially with a manual. An automatic will automatically downshift, raising rpms, so pinging is less likely.
The OP states there is no pinging while crusing which is normal. What I don't know is does the pinging occur all the time during normal acceleration or just in hard acceleration situations.
__________________ "Own a Jeep and own a piece of history."
"The Hunter is not concerned with the opinion of the Wolf."
I have had the same issue with my 2011. I have taken it to the dealership numerous times. I have tries seafoam, fuel injector cleaner, octane boosters and 91 octane. 91 octane is the only thing I have found that helps. I spoke to a trustworthy Jeep mechanic. He said almost all of them he 2011 have the same issue. He said run higher octane. I told him manual says 87. He said its about money. Chrysler doesn't want to tell people that they will have to pay more for gas and want to sell there vehicles. Chrysler can fix the issue but it needs to get he EPA to pass it. As if now they are to busy with the problems that the 2012 are having. Long story longer it can't be fixed until more people complain to Chrysler.