col2560

I got a 1999 v6 5 speed with bad pinging and was wondering if a bad camshaft synchronizer or one that is slightly miss-timed would do this?

thanks in advance.

jwog666

its possible, however you should also notice a loss of power as well

col2560

checked it today and it was spot on, so must be something else, any ideas ??

jwog666

jumped cam timing, carbon buildup in combustion chambers, too hot of a spark plug (heat range), no egr operation or egr disconnected, lugging the engine (using too high of a trans gear to accelerate can all cause pinging.

BabyGT

Are you sure it's a ping and not an exhaust leak?? Can sound similar. The passenger manifolds are notorious for cracking from the ac condesation drain dumping cold water on top of the hot manifold. Not ford's smartest design.

col2560

you mentioned cooler spark plugs, the recommended says motorcraft sp-486, what is a cooler / colder plug? when I asked at the auto store all I got was a blank look !!
thanks.

jwog666

go to a different parts store lol ngk tr6 are the cooler plug for my car

col2560

was reading up on other sites, it's all so confusing with plug numbers, some go down for cooler, some go up. some say copper core is the best, some say iridium etc...1 step cooler from a AP605 is a 104?

Derf00

Let me guess it only happens when you are heavy on the throttle?

Pinging this time of year is probably caused from Heat soak and the ECM not being able to pull sufficient timing to keep it from pinging (spark is too advanced).

Run a cooler plug in combination with a higher octane fuel until the weather starts to cool down. Probably all you need to do.

col2560

it only happens when the engine is up to temp, and only under light load. I either back off the throttle slightly or put my foot down, both seems to stop the pinging. I bought some cooler plugs today, motorcraft AGSF22WM, factory spec was AGSF32WM, so I will see how they do tomorrow when I put them in. I will update results when I drive it.
thanks.