At wits end! Scaled P01 3 Bar C5 limit at 4k
04-01-2020, 06:53 PM
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At wits end! Scaled P01 3 Bar C5 limit at 4k Hey guys I'm at my wits end with trying to figure this C5 corvette out. No matter what i do at 4k the motor feels like it hits a limiter and I have no idea why.
P1514/P0068 tables maxed, cyl air maxed, max delta airflow maxed, calc MAP max maxed. MAF has been zerod out, failed, and confirmed off. I even cut the yellow wire to make sure it was not getting any signal at all. A few days ago i ran into this issue but assumed it was a hardlimit issue (512 g/s) so i scaled the tune 50%. I'm still running into the issue and its driving me insane. Here's a run down of the car below.
99 C5 Z06 M6, Full time on E85, has Alky control meth kit with 100% methanol but its not turned on yet.
Thompson forged 370
227/242 .637/.626 118+4 cam
LSA heads/ls9 gaskets
stock ls3 intake manifold
stock ls2 throttle body with casper ls1 to ls2 conversion harness
slot style maf ( yellow maf signal wire clipped)
longtubes full corsa exhaust
FIC (clinic) 1200s brand new
full return system -8/-6
stock new intank
255 aux kit on hobbs switch
Novi2200R 10 rib with flip drive 2.75 pulley
A&A bracket setup
ECS race intercooler
The initial pcm was only capable of a 2 bar OS. Being he should make 20-22psi per ECS I did a 3 bar OS 02 c5 z06 file (write entire) on the p01 he had. I got all the idle, partial throttle pretty much nailed down but when trying to go WOT I found issues. No matter what i did with airlfow correlation and map codes i kept hitting REP at 4800 (pre scaling). I maxed them all out in the CAL and even set the REP code (p1514) to no error reported but when it hit 4800 it was the same issue like hitting a wall.
For scaling i did half VE/Half IFR/ scaled timing table (brought 1.2g/s to .60) and doubled the QC tq factor to bring the reported tq back in line.) luckily its a manual car so i didn't have to mess with trans stuff.
Today i loaded the scaled tune really hoping the BS at 4800 was gone but now it happens at 4k. Im totally lost here as to what the issue is. The car currently has a BR7EF gapped at .20 which i feel like shouldn't be too cold but with full time E85 i could be wrong. Attached is the tune and log. ANY help is GREATLY appreciated!!
P1514/P0068 tables maxed, cyl air maxed, max delta airflow maxed, calc MAP max maxed. MAF has been zerod out, failed, and confirmed off. I even cut the yellow wire to make sure it was not getting any signal at all. A few days ago i ran into this issue but assumed it was a hardlimit issue (512 g/s) so i scaled the tune 50%. I'm still running into the issue and its driving me insane. Here's a run down of the car below.
99 C5 Z06 M6, Full time on E85, has Alky control meth kit with 100% methanol but its not turned on yet.
Thompson forged 370
227/242 .637/.626 118+4 cam
LSA heads/ls9 gaskets
stock ls3 intake manifold
stock ls2 throttle body with casper ls1 to ls2 conversion harness
slot style maf ( yellow maf signal wire clipped)
longtubes full corsa exhaust
FIC (clinic) 1200s brand new
full return system -8/-6
stock new intank
255 aux kit on hobbs switch
Novi2200R 10 rib with flip drive 2.75 pulley
A&A bracket setup
ECS race intercooler
The initial pcm was only capable of a 2 bar OS. Being he should make 20-22psi per ECS I did a 3 bar OS 02 c5 z06 file (write entire) on the p01 he had. I got all the idle, partial throttle pretty much nailed down but when trying to go WOT I found issues. No matter what i did with airlfow correlation and map codes i kept hitting REP at 4800 (pre scaling). I maxed them all out in the CAL and even set the REP code (p1514) to no error reported but when it hit 4800 it was the same issue like hitting a wall.
For scaling i did half VE/Half IFR/ scaled timing table (brought 1.2g/s to .60) and doubled the QC tq factor to bring the reported tq back in line.) luckily its a manual car so i didn't have to mess with trans stuff.
Today i loaded the scaled tune really hoping the BS at 4800 was gone but now it happens at 4k. Im totally lost here as to what the issue is. The car currently has a BR7EF gapped at .20 which i feel like shouldn't be too cold but with full time E85 i could be wrong. Attached is the tune and log. ANY help is GREATLY appreciated!!
04-01-2020, 07:57 PM
#2
In the log, I see the TPS go to 0 right after the rpm limits.
Is that you lifting? Or is it closing the throttle for you?
You might add pedal position to the channels.
I know you said LS2 TB. It is silver blade correct?
I tuned an 03 at the shop that wasn’t scaled. 15psi no issues. I’ll see if I can get that tune file to compare.
Is that you lifting? Or is it closing the throttle for you?
You might add pedal position to the channels.
I know you said LS2 TB. It is silver blade correct?
I tuned an 03 at the shop that wasn’t scaled. 15psi no issues. I’ll see if I can get that tune file to compare.
04-01-2020, 10:43 PM
#4
Also...
- If you cut the yellow wire why is the MAF frequency not zero?
- Why does your injector pulsewidth in the log not match up duty cycle?
- Don't log MAF airflow or any MAF pids, it will skew g/s, etc in the scanner
- Don't scale for torque, especially with that table
- Don't zero out the MAF table, weird stuff can happen
- Don't turn off any throttle DTCs
- You said you did a write entire with a 3 bar OS 02 c5 z06 file, but it sure doesn't look like a C5 Z06 file?
- If you cut the yellow wire why is the MAF frequency not zero?
- Why does your injector pulsewidth in the log not match up duty cycle?
- Don't log MAF airflow or any MAF pids, it will skew g/s, etc in the scanner
- Don't scale for torque, especially with that table
- Don't zero out the MAF table, weird stuff can happen
- Don't turn off any throttle DTCs
- You said you did a write entire with a 3 bar OS 02 c5 z06 file, but it sure doesn't look like a C5 Z06 file?
04-02-2020, 11:33 AM
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RON: damn thank you for pointing out the the throttle position volts being 0! idk why I didn't catch that. I verified the car indeed does have a gm delco ls2 silver blade throttle body on it.
NicD: so prior to scaling the car was going into REP but I assumed it was due to hitting the 512g/s hard code limit. I disabled the code when I scaled the tune. now Im going to re enable and give it another shot. also I apologize the log I posted was right before I clipped the yellow wire to maf. I just verified in the latest log that the maf does show 0. I can put the stock values back in the maf just to see if that helps but ive tried both and get the same issue. The owner is having a brand new casper harness sent to me just to eliminate variables. here is the 02 vette file I used to write entire onto the 99 pcm for reference as well.
NicD: so prior to scaling the car was going into REP but I assumed it was due to hitting the 512g/s hard code limit. I disabled the code when I scaled the tune. now Im going to re enable and give it another shot. also I apologize the log I posted was right before I clipped the yellow wire to maf. I just verified in the latest log that the maf does show 0. I can put the stock values back in the maf just to see if that helps but ive tried both and get the same issue. The owner is having a brand new casper harness sent to me just to eliminate variables. here is the 02 vette file I used to write entire onto the 99 pcm for reference as well.
04-02-2020, 12:11 PM
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okay guys. the last log is crazy jerk log lol why it was lean on this one i dont know bc the previous log only showed it being 5% off so i added 7%. im logging fuel pressure on the next go around just to make sure all is well.
base tune 5 scaled is my newest file to try. i made some adjustments to the start up modifier since this was the only table that had less than my requested rpm cutoff (it was at 4800)
in the ETC limits instead of the whole table being 100% i put it back to stock, also drivetrain abuse i put at 7k bc i had a tbss that went apeshit killing peddle signal bc i maxed that table in the past so i figure why not with what im dealing with right now. i re enabled P1514 as well so that if it does go into REP it will atleast show it.
One thing that was adjusted that i know 100000000% i did not adjust was speedo calibration tab, all values were doubled and i have absolultey no idea how or why. i restored all of them back to the stock settings.
base tune 5 scaled is my newest file to try. i made some adjustments to the start up modifier since this was the only table that had less than my requested rpm cutoff (it was at 4800)
in the ETC limits instead of the whole table being 100% i put it back to stock, also drivetrain abuse i put at 7k bc i had a tbss that went apeshit killing peddle signal bc i maxed that table in the past so i figure why not with what im dealing with right now. i re enabled P1514 as well so that if it does go into REP it will atleast show it.
One thing that was adjusted that i know 100000000% i did not adjust was speedo calibration tab, all values were doubled and i have absolultey no idea how or why. i restored all of them back to the stock settings.