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Onesick99GT

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Nov 20, 2018
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BTW I think I have some bad oxygen sensors. According to my tune book the oxygen sensors should be going back in forth. I think 3 of mine are bad.
Oxygen Sensors Voltage.PNG
 

a91what

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Mod Dude
Apr 6, 2011
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you can move the one sensor and see.

The file will not delimit into a useable format for me to use. I sent an email to see if they can add it to the list
 

a91what

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Mod Dude
Apr 6, 2011
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to another location to make sure its reading there as well. unless you want to just replace them without doing any troubleshooting
 

Onesick99GT

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Nov 20, 2018
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So I was looking over my graphs and noticed a couple areas that were weird. I've attached it here. My RPMs never moved but it appears as if I was hitting the gas but no change in rpms. What would cause this? And When I go to shift from one gear to the next my rpms rise for about 2 seconds then start to come down.
Solid RPM Run.PNG
 

Onesick99GT

Active Member
Nov 20, 2018
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Dayton, Ohio
Another question? In this picture why is spark advance all over the place. Could this be from a fouled spark plug? Or excess fuel not being burnt up.
Spark Advance All Over The Place.PNG
 

Onesick99GT

Active Member
Nov 20, 2018
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Here is another table showing spark advance. It seems super high. The numbers bouncing from 10-35. Seems really inconsistent.
Spark Advance Really High.PNG
 

Onesick99GT

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Nov 20, 2018
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BTW Adaptive learning is turned off. Should I turn that back on as well? I turned closed loop back on and these graphs were after I turned closed loop back on.
 

a91what

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Mod Dude
Apr 6, 2011
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You are seeing the car attempt to bring the O2 into line, it will add or remove fuel to get the signal it is looking for.

When in closed loop the ECU has control over a large number of parameters to try and get things to work like they 'should' some of this may be what you are seeing.

As far as the timing is concerned, I need TPS or some kind of load feedback to know what conditions the engine is seeing. I assume you are using the stock ignition table correct? when the engine is at very low load [cruising conditions, decel] the timing may be very high. High load- WOT the timing should be referenced from either the high load areas of the ignition map or some kind of WOT lookup table.
 

Onesick99GT

Active Member
Nov 20, 2018
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Dayton, Ohio
Load feedback in the orange line 2nd from bottom. Here is my fuel map. BTW I'm installing my wideband today. I had a muffler shop install the bung. I ran the wires where I needed them and now I have to run the negative/positive and feed the wires into my dimmer switch or something else that has power with the key in the on position. I'm also installing 8 new spark plugs the E3's. Not sure if I should wait on the plugs until after the tuning is done. I'm afraid I might mess them up but also afraid I might not get the tune right during the process.
Base Fuel table.PNG
 

a91what

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Mod Dude
Apr 6, 2011
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Ah ok I see the correlation now, notice how the timing drops as the load increases, this is good. higher load= less timing.

Now this fuel map is fine, you will want to play with this later once the wideband is installed..... Or everything may be fine and you can leave it be. Regardless what some may tell you leaning an engine out under WOT will not really produce any significant power increases. shoot for 12.3-12.6 AFR at WOT and your good.

Now what does the Ignition table look like?
 

a91what

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Mod Dude
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Both are what i wanted thanks!

The max table you can think of as a base table this is the timing vs load

The spark adder to max for A/F when open loop, this is going to add or reduce spark from the max table based on the air fuel ratio. leaner mixtures need more timing to burn correctly fatter mixtures less. dont touch this table.
 

a91what

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Mod Dude
Apr 6, 2011
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also notice you have multiple spark tables all of these interact with each other so be wary of changes to them if your uncertain.
 

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