Speed Density MAF Question???
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Pro
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From: Northfield Center Ohio
Speed Density MAF Question???
My 01 C5 was tunes in speed density. When I unplug the MAF the car dies as soon as I touch the throttle. If I leave it plugged in and remove the air bridge so I can see the throttle plate, it is the same. I thought a speed density tune allowed you to not need the MAF?
Former Vendor
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From: Trenton NJ
Originally Posted by SCannon
My 01 C5 was tunes in speed density. When I unplug the MAF the car dies as soon as I touch the throttle. If I leave it plugged in and remove the air bridge so I can see the throttle plate, it is the same. I thought a speed density tune allowed you to not need the MAF?
Melting Slicks
Joined: Jun 2004
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From: Newark, DE
St. Jude Donor '06
Originally Posted by SCannon
I thought a speed density tune allowed you to not need the MAF?
Former Vendor
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From: Trenton NJ
Originally Posted by Mr. Lucky
True, but 2001 was the year they switched to integrating the IAT sensor into the MAF. You can run w/o the MAF, but not w/o the IAT sensor.
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From: Northfield Center Ohio
Pro
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From: Richmond Hill Ontario
Speed Density Tuning means you should be using the commanded fuel when in open loop table as the basis for fueling as opposed to the MAF sensor readings. If your car was tuned this way then the MAF sensor should have been disabled but the harness should not be disconnected as the IAT sensor is part of it (5 pins). Disconnecting the harness removes the IAT parameter that is used for speed density calculations so your car will not run right.
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From: Northfield Center Ohio
The only thing that got me is the MAF sensor Air Flow vs. Output Frequesncy is still there. Even without the AIT sensor plugged in that is not enough of a reason that the engine will not run once the throttle is touched.
Burning Brakes
Joined: Jul 2006
Posts: 968
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From: Regina Sask
On my 2001 ZO6 cam/header car, I removed the MAF and installed a 3.5" muffler tubing that I expanded to match the stock 85mmMAF.Then I
installed an IAT sensor, wiring pigtail and a grommet from a 2000 Corvette.
If you want to keep the MAF, then just set the MAF fail freq to 0 hz.
Russ Kemp
installed an IAT sensor, wiring pigtail and a grommet from a 2000 Corvette.
If you want to keep the MAF, then just set the MAF fail freq to 0 hz.
Russ Kemp
Former Vendor
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From: Trenton NJ
btw guys...i took a second look at his tune and it appears as if they set his maf codes to "no error reported" meaning if he removes the maf the computer will think the maf is still there & working fine...so the problem was it wasnt in SD mode after all.
Former Vendor
Joined: Dec 2004
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From: Trenton NJ
Originally Posted by Russ K
On my 2001 ZO6 cam/header car, I removed the MAF and installed a 3.5" muffler tubing that I expanded to match the stock 85mmMAF.Then I
installed an IAT sensor, wiring pigtail and a grommet from a 2000 Corvette.
If you want to keep the MAF, then just set the MAF fail freq to 0 hz.
Russ Kemp
installed an IAT sensor, wiring pigtail and a grommet from a 2000 Corvette.
If you want to keep the MAF, then just set the MAF fail freq to 0 hz.
Russ Kemp
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Pro
Joined: May 2005
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From: Northfield Center Ohio
In tunercat the only options I have are ---No Error Reporting (type X), No Mil (Type C), Mil on 2nd Error (type C), and Mil on 1st error (type A)
Im an still unsure what to do here.
Im an still unsure what to do here.
Former Vendor
Joined: Dec 2004
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From: Trenton NJ
Originally Posted by SCannon
In tunercat the only options I have are ---No Error Reporting (type X), No Mil (Type C), Mil on 2nd Error (type C), and Mil on 1st error (type A)
Im an still unsure what to do here.
Im an still unsure what to do here.
Burning Brakes
Joined: Jul 2006
Posts: 968
Likes: 12
From: Regina Sask
Originally Posted by SCannon
In tunercat the only options I have are ---No Error Reporting (type X), No Mil (Type C), Mil on 2nd Error (type C), and Mil on 1st error (type A)
Im an still unsure what to do here.
Im an still unsure what to do here.
And the P103 was set to no error reported (type X) Check code P0102 for being set to no error reported as well.
Russ Kemp