Sensor Output/Data Sticky
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Sensor Output/Data Sticky I think it's time we made a sensor output/data sticky so that when we are troubleshooting problems and have access to a scanner that reads real time data, you'll know what to look for.
Unfortunately I don't know all the information, so I made this post to gather all of it. I'll update the first post with all of the info as we go along...feel free to post updated/new info for me.
Mods - Once all of the data is verified, can you sticky this?
*This assumes stock tuning and OEM GM sensors.
IAC (Idle Air Control)
idle: ~20-40 (hot idle)
cruising and WOT range: ~60-100
TPS (Throttle Position Sensor)
0% throttle: ~.55-.65v "sweet spot"
100% throttle: ~4.7-4.8v (max is 5v)
MAP (Manifold Absolute Pressure)
idle: ~1/3 BAR (~9.3-9.5" Hg)
under load/WOT: ~BAR (~30" Hg)
*note LT1's use a 1 BAR system. BAR (Barometric Pressure) varies with elevation. For this thread, lets assume BAR = 30" Hg.
Timing
idle: ~20
under load/WOT: ~33-35
*note scanner may read a few degrees higher
Knock Sensor (knock retard)
should be zero everywhere if things are working properly
O2 (Oxygen Sensor)
should oscillate between 0-900mV
IAT (Intake Air Temperature)
~110-120*F
MAF (Mass Air Flow)
idle: ~6-10gps (grams per second)
WOT @ 5800rpm: ~240gps
Special thanks to:
infinitebird
shbox
Injuneer
Unfortunately I don't know all the information, so I made this post to gather all of it. I'll update the first post with all of the info as we go along...feel free to post updated/new info for me.
Mods - Once all of the data is verified, can you sticky this?
*This assumes stock tuning and OEM GM sensors.
IAC (Idle Air Control)
idle: ~20-40 (hot idle)
cruising and WOT range: ~60-100
TPS (Throttle Position Sensor)
0% throttle: ~.55-.65v "sweet spot"
100% throttle: ~4.7-4.8v (max is 5v)
MAP (Manifold Absolute Pressure)
idle: ~1/3 BAR (~9.3-9.5" Hg)
under load/WOT: ~BAR (~30" Hg)
*note LT1's use a 1 BAR system. BAR (Barometric Pressure) varies with elevation. For this thread, lets assume BAR = 30" Hg.
Timing
idle: ~20
under load/WOT: ~33-35
*note scanner may read a few degrees higher
Knock Sensor (knock retard)
should be zero everywhere if things are working properly
O2 (Oxygen Sensor)
should oscillate between 0-900mV
IAT (Intake Air Temperature)
~110-120*F
MAF (Mass Air Flow)
idle: ~6-10gps (grams per second)
WOT @ 5800rpm: ~240gps
Special thanks to:
infinitebird
shbox
Injuneer
Last edited by ss.slp.ls1; Jul 7, 2009 at 08:20 PM.
TECH Veteran
Joined: Dec 2008
Posts: 4,142
Likes: 61
From: Little Rock, AR
Injuneer (not a member here) has scanner data explanations on his site that might help. Also some good explanations of how some things work.
http://www.injuneer.com/Scanner.html
http://www.injuneer.com/Scanner.html
I'd say anything under about 80 or so is fine.
At idle it will be around 0.5 or slightly higher. At WOT it should be around 4.5.
At idle depends on how big of a cam you have. Stock will be around 30-40 at idle, with bigger cams it will be more. At WOT it will be 95-100 (this is for a 1-bar setup).
Depends on the tune. Stock at idle will be around 20. At WOT it will be around 33-35 but may show higher by a few degrees depending on the scanner (datamaster always shows the timing a few degrees higher than what is tuned).
Should be zero everywhere if things are operating properly.
Yes.
I usually see 110-120 F.
At idle I usually see 10-12 grams per second (stockish setup). At WOT it will depend on various things.
Yes.
I usually see 110-120 F.
At idle I usually see 10-12 grams per second (stockish setup). At WOT it will depend on various things.
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
I'd say anything under about 80 or so is fine.
At idle it will be around 0.5 or slightly higher. At WOT it should be around 4.5.
At idle depends on how big of a cam you have. Stock will be around 30-40 at idle, with bigger cams it will be more. At WOT it will be 95-100 (this is for a 1-bar setup).
Depends on the tune. Stock at idle will be around 20. At WOT it will be around 33-35 but may show higher by a few degrees depending on the scanner (datamaster always shows the timing a few degrees higher than what is tuned).
Should be zero everywhere if things are operating properly.
Yes.
I usually see 110-120 F.
At idle I usually see 10-12 grams per second (stockish setup). At WOT it will depend on various things.
At idle it will be around 0.5 or slightly higher. At WOT it should be around 4.5.
At idle depends on how big of a cam you have. Stock will be around 30-40 at idle, with bigger cams it will be more. At WOT it will be 95-100 (this is for a 1-bar setup).
Depends on the tune. Stock at idle will be around 20. At WOT it will be around 33-35 but may show higher by a few degrees depending on the scanner (datamaster always shows the timing a few degrees higher than what is tuned).
Should be zero everywhere if things are operating properly.
Yes.
I usually see 110-120 F.
At idle I usually see 10-12 grams per second (stockish setup). At WOT it will depend on various things.
I updated my first post.P.S. Are the values for the MAP sensor in Hg or kPa?
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Injuneer (not a member here) has scanner data explanations on his site that might help. Also some good explanations of how some things work.
http://www.injuneer.com/Scanner.html
http://www.injuneer.com/Scanner.html
P.S. I also used some info from one of your other posts today about IAC counts and TPS voltage.
