Quote:
Tim Cole wrote:
Modern cars have knock sensors that retard timing when subsonic knock is detected.
The rest is just shade nonsense.
So, if only modern cars have knock sensors, using 'shade nonsense' proven over decades before knock sensors might be the best course after all.
Tim,
Who was talking "modern cars" here. Why be so disdainful of a tried and true way to check to determine a possible cause of a "miss" AT IDLE.
The recommendation is to change spark timing with engine running and see if the "miss" gets worse with advance or seems to settle down with retarding the timing a bit. These are not even full degree changes.
Owen, thanks for chiming in. I don't think we're talking here about any kind of radical timing that would burn off the piston tops.
Question is, do you want to identify this "miss" as some kind of real problem, and if so, fix it, or do you want to put words in my mouth about timing issues?
Your replies are typical of the "experts", and therefore I must bow down...
But I've yet to hear from Drew on whether he did any checks on timing at idle.
I have heard no complaints from him on anything except a slight miss at idle. BTW, the low vacuum can also be caused by too much initial advance timing. I never suggested he advance the timing, except to determine if that made the "miss" worse, and if so to retard the timing until it smooths out... or not.
It's the simplest, quickest thing Drew can do now to eliminate one very good possibility.
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