adallak Posted July 18, 2005 Report Share Posted July 18, 2005 Norton 1, How could my 4.9 take that abuse for 5 years? The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
Scotty Posted July 18, 2005 Report Share Posted July 18, 2005 VERY COOL article bbobynski, Thanks. I have to sit and read it soon. I was under the impression that an overheating engine is prone to pre-ignition, not detonation is that true? That detonation can occur even if the engine is not overheating, you have made me understand that one of the causes of detonation is a lack of EGR flow, how does EGR exhaust flow stop detonation or the lack of it cause detonation. As you know for a long time my 91 4.9 had the light pedal detonation and we had many discussions, it drove me crazy and I finally got rid of it. My neighbor has a 92 4.9 and when he drives by he also has the light pedal detonation. Link to comment Share on other sites More sharing options...
Scotty Posted July 19, 2005 Report Share Posted July 19, 2005 Thank you that explains it very good, I was thinking that it had something to do with the EGR gases diluting the fuel mixture but didnt know why! Thanks, Mike Link to comment Share on other sites More sharing options...
bigjayzway Posted July 19, 2005 Author Report Share Posted July 19, 2005 Well I di notice something today. I think I will have to advance to at least 4 0r 5 degrees. My gas milage went up on the highway, but dropped considerably in the city! On the highway I am getting 22 - 25 mpg, but in the city a wopping 8mpg.... Big Jay Life is too short to grow up! Link to comment Share on other sites More sharing options...
Norton1 Posted July 19, 2005 Report Share Posted July 19, 2005 Well son-of-a-gun. I am operating on 20 year old technology. My last hot rod was a 67 Oldsmobile. In about 1984. For us with points and distributers pinging was a death sentence. And preginition was the reason. I used to have a few of the pistons laying around that had holes burned in them from it. So my assumptions of the former posts were based on this. I wouldn't know a knock sensor if I met one! My apologies - I guess my wife was right - I am a walking dinasaur!! Thanks for the eloquent explanation bbobynski. Adallak - I think you have your answer! Steve Link to comment Share on other sites More sharing options...
Ranger Posted July 20, 2005 Report Share Posted July 20, 2005 Well son-of-a-gun. I am operating on 20 year old technology. I guess my wife was right - I am a walking dinasaur!! Welcome to Jurasic Park Link to comment Share on other sites More sharing options...
JimD Posted July 20, 2005 Report Share Posted July 20, 2005 We have made some progress from magneto ignition and hand cranks.... (lawn mowers excepted) Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
Scotty Posted July 20, 2005 Report Share Posted July 20, 2005 The learning never stops does it? Link to comment Share on other sites More sharing options...
bigjayzway Posted July 20, 2005 Author Report Share Posted July 20, 2005 Wow, I never thaught this topic would cause such a dilema Life is too short to grow up! Link to comment Share on other sites More sharing options...
Norton1 Posted July 20, 2005 Report Share Posted July 20, 2005 Well I can honestly say that until this thread I never knew there was a difference between pinging and preignition. I understood the colder plug and why it was necessary. Glad I stuck my ignorant nose in and blurted out my opinion! Much obliged Steve Link to comment Share on other sites More sharing options...
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