'00 3.2 pinging, wits end

[Stites]

Hey y'all.

Our 2000 Passport runs fine at 126k, other than a light to moderate pinging when accelerating and going up hills. I've ran cleaner thru the injectors, Seafoam thru the intake to clean any gunk out of the chambers, checked the plugs(worn some, but I've ran much worse with no worries), all checks out fine. So is there anything else I can try to stop this ping??? Clean the EGR? Colder plugs? Wash the windows? New lug nuts? Race cams, twin-turbos, headers, 3" dual exhaust thru Flowmaster Super 40s???

[amigo-2k]

There is some PING info in the FAQ's.

I've had some PING issues before too. I use Techron Concentrate in the gas once every 3k and use sea foam in the oil (run it for 20 mins and change the oil) and it helps to keep it away.

Also cleaning the egr and egr tube and PCV will help too.

[trooperbc]

Originally Posted by amigo-2k

...Also cleaning the egr and egr tube and PCV will help too.

will ? or can ? how does cleaning the egr system and/or the PCV help with mild pinging ? (a real question btw)

thanks

//bc

[amigo-2k]

http://www.faqs.org/qa/qa-7120.html
http://www.2carpros.com/topics/pings.htm

How EGR systems work The EGR valve recirculates exhaust into the intake stream. Exhaust gases have already combusted, so they do not burn again when they are recirculated. These gases displace some of the normal intake charge. This chemically slows and cools the combustion process by several hundred degrees, thus reducing NOx formation.

The design challenge The EGR system of today must precisely control the flow of recirculated exhaust. Too much flow will retard engine performance and cause a hesitation on acceleration. Too little flow will increase NOx and cause engine ping. A well-designed system will actually increase engine performance and economy. Why? As the combustion chamber temperature is reduced, engine detonation potential is also reduced. This factor enabled the software engineers to write a more aggressive timing advance curve into the spark timing program. If the EGR valve is not flowing, onboard diagnostics (OBD) systems will set a code and the power control module (PCM) will use a backup timing curve that has less advance to prevent engine ping. Less timing advance means less performance and economy. Do your customer a favor and fix those EGR codes that you may have previously deemed as unimportant.