Normal Timing Advance At Idle, In the old days, timing at idle was the the only adjustment you had (and the centrifugal/vacuum advance dealt with dialing in Mechanical ignition systems use a mechanical spark distributor to distribute a high voltage current to the correct spark plug at the correct time. Sent from my XT907 Jan 4, 2016 · You know this process as ignition advance. This is referred to as initial timing. Remember, part-throttle KR is nothing to worry about. The Copperhead PCM has multiple maps for timing alone that can be correlated in different ways. 08 – 0. Dec 30, 2013 · Curious what you guys are seeing at idle and full throttle. To understand the foundation of engine specs, explore our Engine Displacement Calculator to see how cylinder volume interacts with your timing needs. Maintaining consistent spark advance at idle is crucial for optimal engine performance and idle stability. Jan 1, 2023 · At idle, typical initial timing figures are 4-10 degrees before top dead center (BTDC). Long and short term fuel trims that are excessively high or low indicate trouble with mixture control: fuel pressure/fuel delivery isn't keeping up with the engine or there's a vacuum leak or an exhaust leak or a slow O2 sensor or anything else that can adversely effect mixture. 28 g/cyl (remember…do all the timing tables: Idles and Mains!), save and reflash the new changes to the PCM. Oct 9, 2012 · Crane Gold Race Rockers Block polished, screened etc, regular style timing chain, cam is run straight up, not advanced or retarded I forget what converter is in it offhand but is like 3500 or so I think What do you think I should be able to get the car to idle at? what initial and total timing would be in the ballpark? thanks in advance for Nov 28, 2008 · When you find that good timing number, adjust your idle timing advance cells in your tune, usually from 0-1200RPM and 0. Jan 28, 2016 · Spark advance is constantly being adjusted by the PCM. I drives great but I did get a cylinder 1 misfire code on Sunday (first and only such code). 5 at idle, 13% load, maf is 3. per my dist machine my vacuum advance comes in at 12" of vacuum and adds 15 degrees. Trying to explain what is "normal" is very difficult because there's so many different parameters that affect it. If the ignition timing is not set correctly, it can result in engine damage or poor performance. I checked OBD and the cylinder 1 advance at idle in park varies between 9. Lean codes are usually caused by vacuum leaks, and faulty O2 sensors; anything that causes more air to reach the combustion chamber than was expected by the computer. when the engine is spinning faster, you need more degrees of advance to get the same time. . With this configuration, you applied full vacuum to the distributor vacuum advance at idle. Spark advance is essential in optimizing the fuel economy, performance, and emissions of an engine. When setting your timing and adjusting the carburetor idle mixture, you removed this extra advance by I feel like my car is idling a tad rough/sputtery. z6, azevza, 1xgz, pnw, zl, kjw58, babm, utl, vx0r, ubpp, \