Guest 88atta Posted February 16, 2011 Share Posted February 16, 2011 Found this on my travels through the internet. Thought it might be helpful as it simplifies many of the common terms used on the forum and translates them in laymen's language. GM EFI TuningSo you want to know what is going on inside the brain of your OBD I GM vehicle?Let's go over some of the terminology used in some of the more common scanning software and scanners.BLM-Block Learn mode. This is often referred to as the “long term” fuel trims. Long term in computer speak is a few seconds.INT-Integrator. Also called the “short term” fuel trims, as in a second or two.IAC-Idle Air Control. This is usually a small stepper motor that moves a pintle in a seat to regulate airflow at idle and is expressed in steps, usually 0-255.ECM -Engine Control Module. This is the computer that runs the engine systems, gathers information and makes corrections to the systems as needed.TPS-Throttle Position Sensor. This is a potentiometer that tells the ECM how far open the throttle blades are. Its readings are in percentage and voltage (0-5 vdc)MAF-Mass Air Flow (sensor). This sensor tells the ECM how much air is entering the throttle body. The most common MAF’s are the “heated wire” type.MAP-Manifold Absolute Pressure (sensor). This sensor is used in place of a MAF on some systems; it measures pressure within the intake manifold and sends the readings to the ECM for fueling calculations.PCM-Powertrain Control Module. This serves the same function as the ECM, except that it also controls the transmissions in vehicles equipped with “electronic” transmissions.MAT-Manifold Air Temperature (sensor). This device measures the temperature of the air in the inlet tract.CTS-Coolant Temperature Sensor. Measures the temperature of the engine coolant and sends that information to the ECM for fuel and spark calculations.CSI-Cold Start Injector. This device was used mainly on the 1985-1988 GM TPI engines. It supplied extra fuel for cold starting of the engine.EGR-Exhaust Gas Recirculation (valve). Primarily used as an emission control it has a major benefit of cooling the combustion chambers, which helps control detonation.O2-Commonly used to refer to the oxygen sensor. This sensor “reads” the oxygen content of the exhaust gasses and reports that to the ECM.VSS-Vehicle Speed Sensor. This sensor tells the ECM how fast the vehicle is moving. Link to comment Share on other sites More sharing options...
Guest Double M Posted February 16, 2011 Share Posted February 16, 2011 Very thoughfull and much apprciated. If only everyone would be so, many of us newbies would be able to get much more info from this forum. We humans in America speak mostly english, but it seems that some prefer to talk or type as if they are texting and speak in abreviations. While it might make you seem very learned to the others that speak in "Alpha" those of us looking for help only get a string of letters or cryptic codes and first have to figure that out before even figuring out our problem in the first place.... IMHO... Link to comment Share on other sites More sharing options...
Bushwack Posted February 16, 2011 Share Posted February 16, 2011 Much appreciated but there is an acronym missing:PITA - Pain in the _ _ _. This occurs when an unexpected and unwanted event happens. Link to comment Share on other sites More sharing options...
Guest 88atta Posted February 16, 2011 Share Posted February 16, 2011 10-4...and they do happen! Link to comment Share on other sites More sharing options...
Ronnie Posted February 16, 2011 Share Posted February 16, 2011 Good list RD.I will add it to what I already have on ReattaOwner.com. Below is a link to what is there now but what you posted is more detailed on the important ones.Automotive Acronyms and Abbreviations List*-*ReattaOwner.com Link to comment Share on other sites More sharing options...
padgett Posted February 17, 2011 Share Posted February 17, 2011 FLAPS - friendly local auto parts supplyRTFM - read the factory manual Link to comment Share on other sites More sharing options...
Booreatta Posted February 17, 2011 Share Posted February 17, 2011 go to Internet Acronyms Dictionary lots of them there Link to comment Share on other sites More sharing options...
Ronnie Posted February 17, 2011 Share Posted February 17, 2011 RTFM - read the factory manualI've always heard the F stood for something else but I used your version in the list. Link to comment Share on other sites More sharing options...
wws944 Posted February 17, 2011 Share Posted February 17, 2011 I've always heard the F stood for something else but I used your version in the list. Just put "quotes" around it and folks will get the idea. When all else fails, RTFM. Link to comment Share on other sites More sharing options...
Vincent Vega Posted February 17, 2011 Share Posted February 17, 2011 TLA= Three Letter Acronym. Link to comment Share on other sites More sharing options...
Guest 88atta Posted February 17, 2011 Share Posted February 17, 2011 (edited) Old Corrupted Navy Acronym:TAD- Traveling Around Drunk Edited February 17, 2011 by 88atta (see edit history) Link to comment Share on other sites More sharing options...
padgett Posted February 18, 2011 Share Posted February 18, 2011 Just be glad Reattas aren't BUFFs. Link to comment Share on other sites More sharing options...
Guest Richard D Posted February 18, 2011 Share Posted February 18, 2011 BUFF= Big Ugly Fat Fellow? AKA B52 Link to comment Share on other sites More sharing options...
padgett Posted February 19, 2011 Share Posted February 19, 2011 What else ? Accellerates like a Reatta. Link to comment Share on other sites More sharing options...
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