|
C5 Open Discussion General and technical C5 Corvette discussion - ownership, maintenance, repairs, modifications, tuning |
|
Share | Thread Tools | Search this Thread |
06-30-2010, 6:47am | #1 | ||||||
Charter Member - C5 Mod
Barn Stall Owner #41
Join Date: Oct 2009
Location: hagerstown, md
Posts: 5,780
Thanks: 1,206
Thanked 1,291 Times in 827 Posts
Gameroom Barn Bucks: $8192878
|
A/F gauge going nuts
I installed a 2 gauge pod, Autometer A/F and Fuel Pressure gauges. Wired up the A/F gauge per instructions, and this things bounces all over the place like a crackhead on the rock! Sweeps from lean to rich like it was working as a disco light! Never remains in one area(lean, stoich, rich) for more than a second or two.
I checked the electrical connections, all good. Instructions say to connect the purple wire from the gauge to the PCM side purple wire of the connector. For you guys that have an A/F gauge, where is your wires connected? Red(power), black(ground) purple????? Thanks guys! Sneaks
__________________
'98 Pewter coupe. A little of this and a little of that..... |
||||||
06-30-2010, 6:55am | #2 | ||||||
A Real Barner
Join Date: Nov 2009
Location: Lone Star State
Posts: 3,547
Thanks: 2,080
Thanked 394 Times in 336 Posts
Gameroom Barn Bucks: $16626
|
mine does the same at low rpm. punch it & it should go to the current a/f reading.
__________________
|
||||||
06-30-2010, 7:08am | #3 | ||||||
Charter Member
C6 Modulator Barn Stall Owner #27 Barn Raising I,II NCM Supporter '13,'14,'15 Bantayan Kids '13
Join Date: Oct 2009
Location: Lone Star State
Posts: 29,424
Thanks: 16,018
Thanked 7,063 Times in 4,385 Posts
Gameroom Barn Bucks: $100108568
|
Did a search found this:
Narrow Band O2 Sensors began to appear on vehicles with the advent of fuel injection in the 1980’s. Their purpose was to monitor component degradation (i.e. fuel injectors, vacuum leaks) of vehicles as they accumulated miles. Their basic job was to let the computer know whether the vehicle was running at an air/fuel ratio of 14.7:1 under idle (ideal ratio for gasoline engines), moderate acceleration, and cruise conditions, and if it wasn’t, to “trim” the injector pulse-width to either slightly lean or richen the engine. When the computer is paying attention to the input from the O2 sensor, the engine is operating in a “closed-loop” capacity. Under heavier acceleration or wide-open throttle the computer ignores the O2 sensor because it requires an air/fuel ratio other than 14.7:1, which is outside the design parameters of the sensor. This is known as “open-loop” operation. The sensor lets the computer know if the engine is running above or below 14.7:1 by sending voltage to the computer in a range between 0 and 1 volt, usually sweeping between the two extremes of this scale. Auto Meter’s traditional narrow-band air/fuel ratio gauges are simply a voltmeter for this signal. This can be seen by the repeated sweeping back and forth of the gauge in most idle, light throttle, and cruise conditions. To summarize, a narrow band O2 sensor is only able to tell a computer (or gauge, for that matter) whether an engine is operating above or below a 14.7:1 air/fuel ratio. |
||||||
The Following 3 Users Say Thank You to wwomanC6 For This Useful Post: |
06-30-2010, 7:23am | #4 | ||||||
Charter Member
Barn Stall Owner #00
Join Date: Oct 2009
Location: Traverse City, MI
Posts: 4,953
Thanks: 462
Thanked 710 Times in 518 Posts
Gameroom Barn Bucks: $2041885
|
Don't tell me you were too cheap to spring for the wideband.
__________________
00 MY coupe Some minor tweaks here and there. |
||||||
06-30-2010, 8:24am | #5 | ||||||
Charter Member
Join Date: Oct 2009
Location: Northern VA
Posts: 1,358
Thanks: 52
Thanked 179 Times in 145 Posts
Gameroom Barn Bucks: $5852
|
|
||||||
06-30-2010, 10:44am | #6 | ||||||
A Real Barner
Join Date: Nov 2009
Location: Lone Star State
Posts: 3,547
Thanks: 2,080
Thanked 394 Times in 336 Posts
Gameroom Barn Bucks: $16626
|
good find,Wendy. I really don't care what my A/F is doing idling or cruising, but when I stomp that peddle with the juice on I will look at it [if I remember LOL] because that's when it matters. as long as I'm in the "green" I'm golden.
__________________
|
||||||
The Following User Says Thank You to Z06PDQ For This Useful Post: |
06-30-2010, 12:21pm | #7 | ||||||
Charter Member - C5 Mod
Barn Stall Owner #41
Join Date: Oct 2009
Location: hagerstown, md
Posts: 5,780
Thanks: 1,206
Thanked 1,291 Times in 827 Posts
Gameroom Barn Bucks: $8192878
|
The gauges came with the pod. What set-up did you go with Munch.
__________________
'98 Pewter coupe. A little of this and a little of that..... |
||||||
06-30-2010, 12:23pm | #8 | |||||||
Charter Member - C5 Mod
Barn Stall Owner #41
Join Date: Oct 2009
Location: hagerstown, md
Posts: 5,780
Thanks: 1,206
Thanked 1,291 Times in 827 Posts
Gameroom Barn Bucks: $8192878
|
Quote:
Talk back to me brutha!
__________________
'98 Pewter coupe. A little of this and a little of that..... |
|||||||
06-30-2010, 2:15pm | #9 | ||||||
Charter Member
|
|
||||||
06-30-2010, 5:09pm | #10 | ||||||
Administrator
Barn Stall Owner #7 Barn Raising I,II,IV NCM Supporter '13,'14
Join Date: Oct 2009
Location: Pewaukee,WI
Posts: 8,217
Thanks: 1,044
Thanked 5,025 Times in 2,238 Posts
Gameroom Barn Bucks: $30682687
|
What Wendy said is pretty much corrrect.
A 0-1volt narrowband 02 sensor is only accurate at stoich (14.7:1 afr). Outside of that point, it can tell lean or rich, but because it becomes pegged not far away in either direction, it is pretty much useless as a gauge. A 0-5 volt wideband is generally accurate between the "wider" 10:1 and 20:1 afr window. It functions the same way, just with more resolution. |
||||||
The Following User Says Thank You to Y2Kvert4me For This Useful Post: |
06-30-2010, 5:20pm | #11 | ||||||
Charter Member - C5 Mod
Barn Stall Owner #41
Join Date: Oct 2009
Location: hagerstown, md
Posts: 5,780
Thanks: 1,206
Thanked 1,291 Times in 827 Posts
Gameroom Barn Bucks: $8192878
|
__________________
'98 Pewter coupe. A little of this and a little of that..... Last edited by Sneaks; 06-30-2010 at 5:25pm. |
||||||
06-30-2010, 5:22pm | #12 | ||||||
Charter Member
Join Date: Oct 2009
Location: Northern VA
Posts: 1,358
Thanks: 52
Thanked 179 Times in 145 Posts
Gameroom Barn Bucks: $5852
|
|
||||||
06-30-2010, 6:37pm | #13 | ||||||
Charter Member
Barn Stall Owner #00
Join Date: Oct 2009
Location: Traverse City, MI
Posts: 4,953
Thanks: 462
Thanked 710 Times in 518 Posts
Gameroom Barn Bucks: $2041885
|
I can't afford a wideband!
I will get one once I get my nitrous kit though. I have started selling off a few toys to supplement the fund so hopefully I will be fast and furious by the end of summer, just in time for the cold roads and no traction.
__________________
00 MY coupe Some minor tweaks here and there. |
||||||
06-30-2010, 7:46pm | #14 | ||||||
Charter Member - C5 Mod
Barn Stall Owner #41
Join Date: Oct 2009
Location: hagerstown, md
Posts: 5,780
Thanks: 1,206
Thanked 1,291 Times in 827 Posts
Gameroom Barn Bucks: $8192878
|
You just need to find the right friend with one laying in his toolbox.
__________________
'98 Pewter coupe. A little of this and a little of that..... |
||||||
06-30-2010, 8:24pm | #15 | ||||||
Charter Member
|
|
||||||
07-01-2010, 6:19pm | #16 | ||||||
Charter Member - C5 Mod
Barn Stall Owner #41
Join Date: Oct 2009
Location: hagerstown, md
Posts: 5,780
Thanks: 1,206
Thanked 1,291 Times in 827 Posts
Gameroom Barn Bucks: $8192878
|
He's only half the man Marlon Brando was. Literally!
__________________
'98 Pewter coupe. A little of this and a little of that..... |
||||||
|
|
Support the Barn: |
Download the Mobile App; |
Follow us on Facebook: |
||