I was pinging so I ran 89 octane, it helped a little. Now I run 93, and it pings a tiny tiny tiny tiny bit... most people wouldn't enen notice it.

My timing is only 2* advanced... why does my car ping so much?

According to the manual, the car runs on 87 with a 0* timing.

 

Just a thought....
You might have to much carbon build up causing hot spots. Which in return are causing your premature igniting.

 

If you have carbon build up try this stuff.
http://www.sdpc2000.com/catalog/1015...8-cyl-18oz.htm
-Greg

 

I like Sea Foam, down the IAC valve bore. Makes it smoke like crazy. Then go blow it out real good.

 

I also heard that spraying small amounts of water into the tb while revving the motor cleans out carbon deposits... is that true?

I'm a cheap bastard... saving up for that 4th gen leather interior

 

The water trick sure does work. I slowly dribbled water into the throttle body from a measuring cup. Just bring the engine to 2-3000RPM and go slowly to avoid problems. Misting it in will work as well and is probably more safe than dribbling it in.

 

i have the same problem with my 1994 olds 88 royale , pings and pings on highway , carbon build up ?

 

......Or a non-functioning EGR system.

 

but i have no check engine light on tho for egr

 

The ECU won't set the CEL if the exhaust passages are plugged with carbon.

 

could you explain what you mean ? the ecu wont set the cel if the exhaust passages are plugged with carbon

 

i dont ever have a check engine light on , just pings like heck , you can really hear it ping , i put seafoam in gas , i have tried everything , engine doesnt knock tho. possibley engine needs a cleaner put in it ?

 

A small portion of exhaust gas is diverted into the arir/fuel mixture to cool the combustion process. This is done to lower NOx levels as a way to control exhaust emissions. This small portion of exhaust gas is diverted into the intake via the EGR (Exhaust Gas Recirculation) system, which consists of the EGR valve and passages which route exhaust gas into the intake tract.

The only time the ECU will set a code for the EGR is if it senses that the EGR valve isn't opening.

The EGR could still be opening, but if the exhaust passages are plugged, exhaust gases will not get to the combustion chamber to cool the combustion process.

If the combustion process is too hot, you'll get pinging.

If the exhaust passages are plugged, no fuel tank additives or cleaners added to the crankcase will unplug them. The carbon has to be physically removed.

 

thank you for the advice , about possible exhaust passages are plugged , and carbon has to be physically removed. could a dealer or a cheaper private person be able to remove that carbon , or is this a fairly big job ? thank you could there be some possible carbon in that engine making it also ping ? that could be cleaned ?