Reduced Engine Power
10-13-2008, 07:24 PM
#1
FIXED: Reduced Engine Power
Been doing some tuning while cruising and decided to hit some upper rpms for a change.
Got up to about 5500 or so and triggered "limp mode". Not really sure why.
Posting Log of the run. it's obviously toward the end of the log. And posting the tune I had in.
Trims where off for tuning.
(yes corey, trims are working now).
Maybe I hit PE mode? could that do it?
Got up to about 5500 or so and triggered "limp mode". Not really sure why.
Posting Log of the run. it's obviously toward the end of the log. And posting the tune I had in.
Trims where off for tuning.
(yes corey, trims are working now).
Maybe I hit PE mode? could that do it?
Last edited by viciousknid; 10-25-2008 at 10:24 PM.
10-13-2008, 11:05 PM
#6
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If it is just put in fail mode and still plugged in then it is still giving readings, although they aren't being used to control the engine they are still active for diagnostics. Ask me how I know this...
I don't know EFI live but, what I would look for is a table in the Diagnostic section having to do with (Calculated airflow vs. TPS vs. RPM). In HPT the button is called "Calc Airflow-P1514/P0068 error" under TPS in the Diagnostics section.
After you find it raise the values up by 10% and run it for a while. If you don't get limp mode anymore then all good. If you do raise it another 5-10% until you no longer get limp mode. Some people just max this table out, but I don't suggest that as it would completely disable a safety feature.
With the addition of the cam and some tuning you have probably exceeded some of the values in this table which makes the pcm think the TPS is faulty.
I don't know EFI live but, what I would look for is a table in the Diagnostic section having to do with (Calculated airflow vs. TPS vs. RPM). In HPT the button is called "Calc Airflow-P1514/P0068 error" under TPS in the Diagnostics section.
After you find it raise the values up by 10% and run it for a while. If you don't get limp mode anymore then all good. If you do raise it another 5-10% until you no longer get limp mode. Some people just max this table out, but I don't suggest that as it would completely disable a safety feature.
With the addition of the cam and some tuning you have probably exceeded some of the values in this table which makes the pcm think the TPS is faulty.
10-14-2008, 07:25 PM
#7
I think I figured it out. I triggered it again and got a TPS code, but seems odd. so I loaded my other tune and was able to go all the way.
Compared the two VE tables and the Table that was throwing it into limp mode (tuned with AUTOVE) had set the upper rpms too high. Maybe I went into PE mode during the drive and gave it false readings?
Compared the two VE tables and the Table that was throwing it into limp mode (tuned with AUTOVE) had set the upper rpms too high. Maybe I went into PE mode during the drive and gave it false readings?
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10-25-2008, 10:28 PM
#8
Had Tyler loadCOS3 and do an SD tune but when I hit 5200 RPM I triggered the damn REP again.
after a while of Tyler digging and searching for the problem he finally found a solution on the EFILIVE Forum, while I ate my BBQ Burritos.....mmmmmmmm.
I changed C5501 (MAP Rationality Test RPM HIGH from 5000 to 6500
and added 50% to C6101 (ETC Predicted Airlfow)
Loaded those changes and everything is Hunky Dory.
after a while of Tyler digging and searching for the problem he finally found a solution on the EFILIVE Forum, while I ate my BBQ Burritos.....mmmmmmmm.
I changed C5501 (MAP Rationality Test RPM HIGH from 5000 to 6500
and added 50% to C6101 (ETC Predicted Airlfow)
Loaded those changes and everything is Hunky Dory.
Last edited by viciousknid; 10-25-2008 at 10:34 PM.
10-25-2008, 10:35 PM
#10
Had Tyler loadCOS3 and do an SD tune but when I hit 5200 RPM I triggered the damn REP again.
after a while of Tyler digging and searching for the problem he finally found a solution on the EFILIVE Forum, while I ate my BBQ Burritos.....mmmmmmmm.
I changed C5501 (MAP Rationality Test RPM HIGH from 5000 to 6500
and added 50% to C6101 (ETC Predicted Airlfow)
Loaded those changes and everything is Hunky Dory.
after a while of Tyler digging and searching for the problem he finally found a solution on the EFILIVE Forum, while I ate my BBQ Burritos.....mmmmmmmm.
I changed C5501 (MAP Rationality Test RPM HIGH from 5000 to 6500
and added 50% to C6101 (ETC Predicted Airlfow)
Loaded those changes and everything is Hunky Dory.
It's there..... plain as day.....