I have a 2001 pathfinder and it pings under load occasinally with no related codes. Does anyone have any ideas on how to fix this without using premium gas all the time.

add a little bit of human urine (note: it has to be human, no other mammals) to the gas and it will stop the pinging.

I've used premium gas since I bought mine with 39k miles on it (now has 150k) and mine has now started to ping. I just changed the plugs whiched helped but still a ping under load with 93 octane.

fueler wrote:add a little bit of human urine (note: it has to be human, no other mammals) to the gas and it will stop the pinging.

I thought urea was only for diesels?

does anyone have any ideas or has had this problem. I would like to try to resolve problem if I can.

The only solution is to stop being such a cheap-*** and use premium fuel, or move to Colorado where the elevation permits use of 85 octane.

pick your poison, i'd choose premium fuel, the extra $1 to save your engine is worth it unless your car is leased.

ahh num nuts you seem to be letting out alot of hot air. If you cant offer any help then there is no need for you remarks.

zerothread/265984 You asked the same question back then and got an answer. Just so you know, whenever theres a reply, the thread goes to the top of the forum, so there is no need to post the same question in a new thread, especially just an hour after I reply to the first thread.



ANYWAYS - here is the long answer, copied directly from wikipedia. Detonation can be prevented by:

* The use of a fuel with higher octane rating * The addition of octane-increasing "lead", methylcyclopentadienyl manganese tricarbonyl (MMT), isooctane, or other antiknock agents. * Increasing the amount of fuel injected/inducted (resulting in lower Air to Fuel Ratio) * Reduction of cylinder pressure by increasing the engine revolutions (lower gear), decreasing the manifold pressure (throttle opening) or reducing the load on the engine, or any combination. * Reduction of charge (in-cylinder) temperatures (such as through cooling, water injection or compression ratio reduction). * Retardation of spark plug ignition. * Improved combustion chamber design that concentrates mixture near the spark plug and generates high turbulence to promote fast even burning. * Use of a spark plug of colder heat range in cases where the spark plug insulator has become a source of pre-ignition leading to detonation.