Will someone Help me with MAF Problem with HP Tuners?
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From: Shelby Twp. Mich
Will someone Help me with MAF Problem with HP Tuners? Ok ,I had my tuner calibrate my car for 85mm maf with no problems.Now I went back to my stock maf for a little bit.Now here is the thing ,I used to have a surging issue with the stock maf,None with the 85 mm maf.Now that I went back to my stock maf the surging problem is back.So I left my stock maf on and reflashed the pcm with the 85 maf tune ,(meaning I only changed the MAF Airflow vs. Output Frequency) and surge is now gone but yet with my stock maf 
How do I read the numbers with HP Tuners?I thought the Maf airflow vs.Output Frequency didnt come into effect until 1500 rpms What do the top numbers mean 1500 1625 1750 and so on up?I thought it was RPM's?If that was the case why is this effecting my Idle ,making it surge in park and drive ????Please help....
How do I read the numbers with HP Tuners?I thought the Maf airflow vs.Output Frequency didnt come into effect until 1500 rpms What do the top numbers mean 1500 1625 1750 and so on up?I thought it was RPM's?If that was the case why is this effecting my Idle ,making it surge in park and drive ????Please help.... 
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Originally Posted by Pro Mouse
Ok ,I had my tuner calibrate my car for 85mm maf with no problems.Now I went back to my stock maf for a little bit.Now here is the thing ,I used to have a surging issue with the stock maf,None with the 85 mm maf.Now that I went back to my stock maf the surging problem is back.So I left my stock maf on and reflashed the pcm with the 85 maf tune ,(meaning I only changed the MAF Airflow vs. Output Frequency) and surge is now gone but yet with my stock maf How do I read the numbers with HP Tuners?I thought the Maf airflow vs.Output Frequency didnt come into effect until 1500 rpms What do the top numbers mean 1500 1625 1750 and so on up?I thought it was RPM's?If that was the case why is this effecting my Idle ,making it surge in park and drive ????Please help....
How do I read the numbers with HP Tuners?I thought the Maf airflow vs.Output Frequency didnt come into effect until 1500 rpms What do the top numbers mean 1500 1625 1750 and so on up?I thought it was RPM's?If that was the case why is this effecting my Idle ,making it surge in park and drive ????Please help.... Thread Starter
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From: Shelby Twp. Mich
Here are my MAF Frequency Tables the first is 85 MM maf
1.99 2.31 2.7 3.13 3.55 4.05 4.58 5.18 5.81 6.54 7.3 8.09 8.92 9.79 10.74 11.78 12.9 14.1 15.37 16.74 18.17 19.69 21.3 22.98 24.76 26.62 28.56 30.59 32.73 35 37.39 39.92 42.58 45.37 48.32 51.4 54.62 57.97 61.47 65.11 68.89 72.81 76.87 81.08 85.44 89.95 94.61 99.42 104.41 109.57 114.89 120.44 126.19 132.13 138.27 144.63 151.18 157.95 164.86 171.99 179.33 186.91 194.74 202.85 211.25 219.96 229.02 238.44 248.24 258.48 269.16 280.34 292.03 304.3 317.17 330.68 344.87 359.81 375.52 375.52 375.52 375.52 375.52 375.52 375.52
The second one is my Stock MAF Frequency Table
2.44 2.84 3.32 3.84 4.38 4.98 5.64 6.37 7.16 8.05 8.98 9.97 10.98 12.06 13.23 14.51 15.89 17.36 18.94 20.62 22.38 24.26 26.23 28.31 30.48 32.78 35.17 37.67 40.31 43.1 46.04 49.17 52.44 55.88 59.51 63.3 67.27 71.4 75.71 80.2 84.85 89.68 94.67 99.86 105.23 110.77 116.51 122.45 128.59 134.95 141.5 148.34 155.41 162.72 170.29 178.12 186.19 194.52 203.04 211.82 220.86 230.19 239.84 249.83 260.17 270.91 282.06 293.66 305.73 318.33 331.5 345.26 359.67 374.77 390.61 407.26 424.74 443.13 442.8 442.8 442.8 442.8 442.8 442.8 442.8
The rest of the pcm is the same,What does the number above these numbers mean?Thanks!
1.99 2.31 2.7 3.13 3.55 4.05 4.58 5.18 5.81 6.54 7.3 8.09 8.92 9.79 10.74 11.78 12.9 14.1 15.37 16.74 18.17 19.69 21.3 22.98 24.76 26.62 28.56 30.59 32.73 35 37.39 39.92 42.58 45.37 48.32 51.4 54.62 57.97 61.47 65.11 68.89 72.81 76.87 81.08 85.44 89.95 94.61 99.42 104.41 109.57 114.89 120.44 126.19 132.13 138.27 144.63 151.18 157.95 164.86 171.99 179.33 186.91 194.74 202.85 211.25 219.96 229.02 238.44 248.24 258.48 269.16 280.34 292.03 304.3 317.17 330.68 344.87 359.81 375.52 375.52 375.52 375.52 375.52 375.52 375.52
The second one is my Stock MAF Frequency Table
2.44 2.84 3.32 3.84 4.38 4.98 5.64 6.37 7.16 8.05 8.98 9.97 10.98 12.06 13.23 14.51 15.89 17.36 18.94 20.62 22.38 24.26 26.23 28.31 30.48 32.78 35.17 37.67 40.31 43.1 46.04 49.17 52.44 55.88 59.51 63.3 67.27 71.4 75.71 80.2 84.85 89.68 94.67 99.86 105.23 110.77 116.51 122.45 128.59 134.95 141.5 148.34 155.41 162.72 170.29 178.12 186.19 194.52 203.04 211.82 220.86 230.19 239.84 249.83 260.17 270.91 282.06 293.66 305.73 318.33 331.5 345.26 359.67 374.77 390.61 407.26 424.74 443.13 442.8 442.8 442.8 442.8 442.8 442.8 442.8
The rest of the pcm is the same,What does the number above these numbers mean?Thanks!
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Originally Posted by Pro Mouse
Here are my MAF Frequency Tables the first is 85 MM maf
1.99 2.31 2.7 3.13 3.55 4.05 4.58 5.18 5.81 6.54 7.3 8.09 8.92 9.79 10.74 11.78 12.9 14.1 15.37 16.74 18.17 19.69 21.3 22.98 24.76 26.62 28.56 30.59 32.73 35 37.39 39.92 42.58 45.37 48.32 51.4 54.62 57.97 61.47 65.11 68.89 72.81 76.87 81.08 85.44 89.95 94.61 99.42 104.41 109.57 114.89 120.44 126.19 132.13 138.27 144.63 151.18 157.95 164.86 171.99 179.33 186.91 194.74 202.85 211.25 219.96 229.02 238.44 248.24 258.48 269.16 280.34 292.03 304.3 317.17 330.68 344.87 359.81 375.52 375.52 375.52 375.52 375.52 375.52 375.52
The second one is my Stock MAF Frequency Table
2.44 2.84 3.32 3.84 4.38 4.98 5.64 6.37 7.16 8.05 8.98 9.97 10.98 12.06 13.23 14.51 15.89 17.36 18.94 20.62 22.38 24.26 26.23 28.31 30.48 32.78 35.17 37.67 40.31 43.1 46.04 49.17 52.44 55.88 59.51 63.3 67.27 71.4 75.71 80.2 84.85 89.68 94.67 99.86 105.23 110.77 116.51 122.45 128.59 134.95 141.5 148.34 155.41 162.72 170.29 178.12 186.19 194.52 203.04 211.82 220.86 230.19 239.84 249.83 260.17 270.91 282.06 293.66 305.73 318.33 331.5 345.26 359.67 374.77 390.61 407.26 424.74 443.13 442.8 442.8 442.8 442.8 442.8 442.8 442.8
The rest of the pcm is the same,What does the number above these numbers mean?Thanks!
1.99 2.31 2.7 3.13 3.55 4.05 4.58 5.18 5.81 6.54 7.3 8.09 8.92 9.79 10.74 11.78 12.9 14.1 15.37 16.74 18.17 19.69 21.3 22.98 24.76 26.62 28.56 30.59 32.73 35 37.39 39.92 42.58 45.37 48.32 51.4 54.62 57.97 61.47 65.11 68.89 72.81 76.87 81.08 85.44 89.95 94.61 99.42 104.41 109.57 114.89 120.44 126.19 132.13 138.27 144.63 151.18 157.95 164.86 171.99 179.33 186.91 194.74 202.85 211.25 219.96 229.02 238.44 248.24 258.48 269.16 280.34 292.03 304.3 317.17 330.68 344.87 359.81 375.52 375.52 375.52 375.52 375.52 375.52 375.52
The second one is my Stock MAF Frequency Table
2.44 2.84 3.32 3.84 4.38 4.98 5.64 6.37 7.16 8.05 8.98 9.97 10.98 12.06 13.23 14.51 15.89 17.36 18.94 20.62 22.38 24.26 26.23 28.31 30.48 32.78 35.17 37.67 40.31 43.1 46.04 49.17 52.44 55.88 59.51 63.3 67.27 71.4 75.71 80.2 84.85 89.68 94.67 99.86 105.23 110.77 116.51 122.45 128.59 134.95 141.5 148.34 155.41 162.72 170.29 178.12 186.19 194.52 203.04 211.82 220.86 230.19 239.84 249.83 260.17 270.91 282.06 293.66 305.73 318.33 331.5 345.26 359.67 374.77 390.61 407.26 424.74 443.13 442.8 442.8 442.8 442.8 442.8 442.8 442.8
The rest of the pcm is the same,What does the number above these numbers mean?Thanks!
Thread Starter
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From: Shelby Twp. Mich
I am new to the tuning this kind of stuff ,I am used to a timing light and a screw driver(LOL).Will it hurt performance if I use the 85mm scale with the stock maf?and How do I go about getting some readings?Thanks again
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Originally Posted by Pro Mouse
I am new to the tuning this kind of stuff ,I am used to a timing light and a screw driver(LOL).Will it hurt performance if I use the 85mm scale with the stock maf?and How do I go about getting some readings?Thanks again
Check the axis (Hz) and be sure you didn't copy a
short table into the MAF airflow vector. Later years
start at lower Hz and go out to higher. You need to
start at the proper frequency point which may not
be the leftmost.
short table into the MAF airflow vector. Later years
start at lower Hz and go out to higher. You need to
start at the proper frequency point which may not
be the leftmost.
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TECH Addict
Joined: Feb 2004
Posts: 2,826
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Originally Posted by jimmyblue
Check the axis (Hz) and be sure you didn't copy a
short table into the MAF airflow vector. Later years
start at lower Hz and go out to higher. You need to
start at the proper frequency point which may not
be the leftmost.
short table into the MAF airflow vector. Later years
start at lower Hz and go out to higher. You need to
start at the proper frequency point which may not
be the leftmost.
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