Recent content by dterry1

The case for Pre-ignition is also very interesting. In my case, for the first few accelerations there is no pinging. But as the drive continues, that is when the pinging starts. It's about 1-3 minutes of no pinging where I think in my head "yes I finally fixed it", then it starts again...

I'm not sure if you read the entire thread, but I did accidently click 1 thread off of where I meant to click. But the people here have been just as helpful as the people in a different size engine thread.

"The best indication of detonation is the pinging sound that cars, particularly old models, make at low speeds and under load" Doesn't this mean that when I get off the gas and am coasting at low speed, and am hearing pinging, it is still detonation?

"One thing to understand is that detonation is not necessarily destructive. Many engines run under light levels of detonation, even moderate levels. Some engines can sustain very long periods of heavy detonation without incurring any damage. If you've driven a car that has a lot of spark advance...

Points

I can take a video. For the "Vehicles don't ping decelerating", why is that? The engine is still firing while decelerating, it's just doing so at a lower RPM. And if the detonation is now occurring at a lower RPM after retarding the timing, I don't see how it's out of the question. Now I...

I don't have much time today or tomorrow. So I will gather all of the needed information over the weekend. The distributor is stock I will come back with my initial timing, total timing, cranking compression, all in RPM. some of the other information requested that I have: Trans is a 727...

Thats my bad, clicked the wrong thread.

Update: After adjusting the idle mixture screws, and retarding the timing, I got it to the point where it no longer pings at ~2k rpm. But it does ping as I let off the gas and the car is coming down in RPM, around the 1,100 - 1,500 range. The pinging is much quieter, but now is in the lower...

Two steps colder, could you explain what that means? I'm uneducated on what that means, thanks.

about 3 tanks

Gas is fresh

Tbh, I have no idea how lower octane will help reduce it It is what my mechanic recommended

I'll swap the plugs, add some fuel additive, and get back to y'all. Thank you everyone for your help, everyone is very helpful like always. Really helps a new classic car owner like me, I can't appreciate y'all more.

I considered it, but with my lack of experience I really didn't want to tinker with the distributor unless all other things have been looked at.