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Cory S
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With SCT, you log whatever PIDS you choose. The tune file cannot block PCM PID data available through OBD access.
Cory S
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I don’t believe many are those are necessary, since the data shows it’s trying to continue to demand a lower targeted lambda by increasing STFT delivery all the way up through the RPM range. Fuel volume is the indicated issue IMO.
K4fxd
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Still would be nice to see commanded lambda. Get rid of MAF frequency and replace it with Lb/min Get rid of the trans PID's.
It is real strange that it is adding more fuel to get .81 lambda on 91 gas than on E85. Makes me wonder if the tune is calling for .76 on gas or ??
It is real strange that it is adding more fuel to get .81 lambda on 91 gas than on E85. Makes me wonder if the tune is calling for .76 on gas or ??
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bhvnce
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I'm using the config file PBD provided I didn't even think to search for others
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bhvnce
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Tomorrow im going to take the fuel hat out and redo all the wiring and hoses to make sure its all correct. From there, I'll try another WOT log on 91 and see if i can get a video of the pressure guage from inside the engine bay. Will update everyone.
I really appreciate the help y'all... not knowing what the hell is going on is a lonely place.
I really appreciate the help y'all... not knowing what the hell is going on is a lonely place.
Cory S
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I believe it how the transition starts to
correct from the start of WOT that can cause the different demand. Trims will continue to rise until target is met. The further away from target the faster they rise. I believe PBD has most of their fuel tables targeting .78-.80. Both my gas and E cals are .78 target.
Cory S
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I would create your own config file as well for what YOU want to keep eyes on as well. There’s a few things missing on yours I like to see myself like K4xfd mentioned.
Cory S
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It’s making a comeback!It's been a long time since I have used Live link or SCT
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What is the injector duty cycle at, at WOT at the top of a pull?
Andy13186
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Has the car sat with e85 in the lines for some period of time? You could try some redline fuel system cleaner to maybe clean the injectors if they got gunked up after sitting for a while.
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Several possibilities.
1) You're running out of injector. Unlikely if you're at proper pressure, but if you're not at proper pressure (relative to air charge) then the injector just can't deliver enough fuel.
1.a. You could be losing delta pressure if the boost index/vacuum line is not properly increasing the pressure at the rails corresponding to boost. That means that if you're starting off at 45 psi (50 with vacuum cycle) and you're adding 10 psi, if the regulator isn't increasing to 55, then your relative injection pressure is like trying to deliver fuel at 35 psi (45 - 10 psi).
1.b. The fuel regulator could be asking for more (properly vacuum indexed) but something in your fuel system is running out of steam. The pumps are crying uncle, or more likely, there's some sort of restriction(s) in the line that's acting as a pre squeeze (almost like a pre-regulator).
2) You're running out of fuel delivery (prior to the regulator/rails/injectors). What are your voltages at WOT? Pump output drops pretty significantly if your voltage is at mid 12 vs high 13. If your battery is properly charging, you shouldn't see a drastic dropoff, but the charging system will cut the alternator output under WOT. Unlikely, but something to check.
2a. I know it sounds crazy, but you need to check (with a multimeter) to ensure BOTH pumps are running and functional. Recently saw a buddy who was leaning and it was because he was down one pump out of 3 (the relay for the 3rd pump had burnt out because of what was probably a bad connection/handshake). Doing wiring properly (with soldered connections and proper wire sizes) along with PROPER ground will mean you get the most out of your pumps. Sketchy ground, undersized wiring, poor battery, can all result in the pumps output being less than optimal.
2b. As I wrote above, it does virtually NO good to have ginormous components throughout the system if there's even one restriction or choke point. Recently I've seen some fuel setups where the hat itself is a coffee straw (the internal union that combines the multi pump flow chokes to like a 6AN feed). Your pumps could be doing the work, but if they're trying to push through any restriction, you're getting choked flow.
Start with each possibility, trouble shoot and eliminate as you go.
1) You're running out of injector. Unlikely if you're at proper pressure, but if you're not at proper pressure (relative to air charge) then the injector just can't deliver enough fuel.
1.a. You could be losing delta pressure if the boost index/vacuum line is not properly increasing the pressure at the rails corresponding to boost. That means that if you're starting off at 45 psi (50 with vacuum cycle) and you're adding 10 psi, if the regulator isn't increasing to 55, then your relative injection pressure is like trying to deliver fuel at 35 psi (45 - 10 psi).
1.b. The fuel regulator could be asking for more (properly vacuum indexed) but something in your fuel system is running out of steam. The pumps are crying uncle, or more likely, there's some sort of restriction(s) in the line that's acting as a pre squeeze (almost like a pre-regulator).
2) You're running out of fuel delivery (prior to the regulator/rails/injectors). What are your voltages at WOT? Pump output drops pretty significantly if your voltage is at mid 12 vs high 13. If your battery is properly charging, you shouldn't see a drastic dropoff, but the charging system will cut the alternator output under WOT. Unlikely, but something to check.
2a. I know it sounds crazy, but you need to check (with a multimeter) to ensure BOTH pumps are running and functional. Recently saw a buddy who was leaning and it was because he was down one pump out of 3 (the relay for the 3rd pump had burnt out because of what was probably a bad connection/handshake). Doing wiring properly (with soldered connections and proper wire sizes) along with PROPER ground will mean you get the most out of your pumps. Sketchy ground, undersized wiring, poor battery, can all result in the pumps output being less than optimal.
2b. As I wrote above, it does virtually NO good to have ginormous components throughout the system if there's even one restriction or choke point. Recently I've seen some fuel setups where the hat itself is a coffee straw (the internal union that combines the multi pump flow chokes to like a 6AN feed). Your pumps could be doing the work, but if they're trying to push through any restriction, you're getting choked flow.
Start with each possibility, trouble shoot and eliminate as you go.
