It's like its in Cruise Control.
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It's like its in Cruise Control.
Did tuning on my friends A4. After I adjusted his idle, its like on the freeway it goes into cruise control at about 60. I did it via the "Programming for Dummies" style Idle tuning. He lost me at the part where he talked about the Air Idle in Gear Table. Anyone can clarify that.
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But this is what he says to do to fix it..."Take the car for a drive and check your idle. If the car goes on cruise control reduce the Idle Air in Gear Table .2 (further if necessary). If the idle holds at 2000 RPM for extended periods of time reduce the P/N Airflow Decay table for all points above 10 MPH by 5% (multiply by 95) until this stops. Be vary careful on this table. " Where is the Idle Air in Gear Table he's talking about???
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Originally Posted by Y2K SS
But this is what he says to do to fix it..."Take the car for a drive and check your idle. If the car goes on cruise control reduce the Idle Air in Gear Table .2 (further if necessary). If the idle holds at 2000 RPM for extended periods of time reduce the P/N Airflow Decay table for all points above 10 MPH by 5% (multiply by 95) until this stops. Be vary careful on this table. " Where is the Idle Air in Gear Table he's talking about???
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You didn't answer the basic question I asked.
If you changed the TB idle set screw, you probably did it too much. Trying to change another table to cover that up is not the best starting point. See if you can turn it back a bit w/o affecting your idle. After that you can decrease the idle airflow in gear, if needed.
If you changed the TB idle set screw, you probably did it too much. Trying to change another table to cover that up is not the best starting point. See if you can turn it back a bit w/o affecting your idle. After that you can decrease the idle airflow in gear, if needed.
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#8
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if your throttle voltage is under about .65-.70 V and the iac count is between 30-50 then you are good and can start to get the iac counts inline and the idle airflow, if the counts are too high after you have adjsuted the effective area and airflow at idle, you need to open your set screw, i say about .01-.02 V for every 10 iac counts you want to go, thats a good rule of thumb i found when messing with mine, i started at .57 and went to .61 to get it right, it was 50 now its 30
#9
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Originally Posted by Y2K SS
any other ideas????
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Originally Posted by Ragtop 99
You didn't answer the basic question I asked.
If you changed the TB idle set screw, you probably did it too much. Trying to change another table to cover that up is not the best starting point. See if you can turn it back a bit w/o affecting your idle. After that you can decrease the idle airflow in gear, if needed.
If you changed the TB idle set screw, you probably did it too much. Trying to change another table to cover that up is not the best starting point. See if you can turn it back a bit w/o affecting your idle. After that you can decrease the idle airflow in gear, if needed.
The reason I ask for more ideas is because at first all I asked was for the explanation to find where the "Air Idle in Gear Table" was. I'm relatively new to this whole HPTuning thing.
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Originally Posted by Ragtop 99
You didn't answer the basic question I asked.
If you changed the TB idle set screw, you probably did it too much. Trying to change another table to cover that up is not the best starting point. See if you can turn it back a bit w/o affecting your idle. After that you can decrease the idle airflow in gear, if needed.
If you changed the TB idle set screw, you probably did it too much. Trying to change another table to cover that up is not the best starting point. See if you can turn it back a bit w/o affecting your idle. After that you can decrease the idle airflow in gear, if needed.
The reason I ask for more ideas is because at first all I asked was for the explanation to find where the "Air Idle in Gear Table" was. I'm relatively new to this whole HPTuning thing.
#12
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from a cold start lot the idle desired airflow and the dynamic/MAF airflow. if the lines do not over lap this causes problems and if they are way off then this would really cause problems. once you get those in line, tune the ve correctly and then tune the running airflow tables. then the car will react good. when you log those idle airflows look at the values per given IAC count, say at position 80 the dynamic is 8 g/sec, by the way log in g/sec, and the desired is 10 g/sec then you need to ADD about 10-15 in the cell that is closest to 100 in the effective area chart, do this until the lines overlap from a cold start, if you email me the logs and bin i can help you
then you tune the ve get it right
then you log from a cold start, after resetting the fuel trims, and after a few start ups, and adjsut the idle airflow from there, if it needs more add more to the table at the certain coolant temp...yada yada yada. do this and it will help you out, if not then you may need to adjsut the cracker tables, dont use those tuning for dummies write ups, i didnt do half that stuff for my cam just did the stuff i thought was logical and added to it, working great so far for me. let me know if you need help
then you tune the ve get it right
then you log from a cold start, after resetting the fuel trims, and after a few start ups, and adjsut the idle airflow from there, if it needs more add more to the table at the certain coolant temp...yada yada yada. do this and it will help you out, if not then you may need to adjsut the cracker tables, dont use those tuning for dummies write ups, i didnt do half that stuff for my cam just did the stuff i thought was logical and added to it, working great so far for me. let me know if you need help
#13
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It would be easier if you posted or emailed a log file of when it happens, and also at idle. If you want to do that make sure and log dynamic airflow, desired airflow, IAC position, and idle cracker airflow.
If it happens at 0% throttle, the decay tables have nothing to do with it. Ve has nothing to do with it.
If it happens at 0% throttle, the decay tables have nothing to do with it. Ve has nothing to do with it.
#14
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Originally Posted by P Mack
It would be easier if you posted or emailed a log file of when it happens, and also at idle. If you want to do that make sure and log dynamic airflow, desired airflow, IAC position, and idle cracker airflow.
never logged cracker airflow myself, what woudl that tell you?
#17
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It will show whether the throttle cracker is causing the cruise control. The RAF airflow (trimmed) plus the cracker airflow should equal the desired airflow. If they're not equal, something else is telling the IAC to open. The solution is probably in IAC vs area table, but why wonder when you can log everything?