Micro-Tech MAF: More observations
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 3,393
Likes: 392
From: Lakeville MI
Micro-Tech MAF: More observations
Rich in the morning, lean in the afternoon.
I've posted previously regarding the calibration issues with a Micro-Tech MAF and calibration settings that work. Lately I've been seeing some additional temperature sensitivity.
With the same MAF calibration, I'm seeing slightly rich BLMs (typically low 120s) in the morning when the ambient air temp is in the 50s, and slightly lean BLMs (low-mid 130s) later on when it warms to the 60-70 F range.
This is primarily occurring in BLM cells 7, 11 and 15 while in a steady cruise.
This behavior isn't completely undesireable, but can be annoying when dialing in the MAF calibration in an attempt to nail the BLMs.
I guess I'll wait for a nice 75 degree day to normalize my calibration for this temperature.
Due to these issues with the Micro-Tech MAFs, I would avoid them, unless you can stay on top of the calibration.
The lifetime guarantee is nice, and the price is relatively low for a new MAF, which makes them attractive. However, expect to have some issues if you choose to go this route.
I've posted previously regarding the calibration issues with a Micro-Tech MAF and calibration settings that work. Lately I've been seeing some additional temperature sensitivity.
With the same MAF calibration, I'm seeing slightly rich BLMs (typically low 120s) in the morning when the ambient air temp is in the 50s, and slightly lean BLMs (low-mid 130s) later on when it warms to the 60-70 F range.
This is primarily occurring in BLM cells 7, 11 and 15 while in a steady cruise.
This behavior isn't completely undesireable, but can be annoying when dialing in the MAF calibration in an attempt to nail the BLMs.
I guess I'll wait for a nice 75 degree day to normalize my calibration for this temperature.
Due to these issues with the Micro-Tech MAFs, I would avoid them, unless you can stay on top of the calibration.
The lifetime guarantee is nice, and the price is relatively low for a new MAF, which makes them attractive. However, expect to have some issues if you choose to go this route.
Burning Brakes
Joined: Apr 2004
Posts: 762
Likes: 2
From: Huntington ma
Try using one year round! I've been fussing with one of these for nearly two years now, and Believe me - trying to make it work during the Really cold temperatures of winter is a challenge. It's like the ambient air correction in the thing (assuming that it has anything like that at all..) is ridiculously inaccurate. Buy an OEM replacement - save yourself the headaches...
Racer
Joined: Dec 2003
Posts: 454
Likes: 0
From: Double Oak TX
Rich in the morning, lean in the afternoon.
I've posted previously regarding the calibration issues with a Micro-Tech MAF and calibration settings that work. Lately I've been seeing some additional temperature sensitivity.
With the same MAF calibration, I'm seeing slightly rich BLMs (typically low 120s) in the morning when the ambient air temp is in the 50s, and slightly lean BLMs (low-mid 130s) later on when it warms to the 60-70 F range.
This is primarily occurring in BLM cells 7, 11 and 15 while in a steady cruise.
This behavior isn't completely undesireable, but can be annoying when dialing in the MAF calibration in an attempt to nail the BLMs.
I guess I'll wait for a nice 75 degree day to normalize my calibration for this temperature.
Due to these issues with the Micro-Tech MAFs, I would avoid them, unless you can stay on top of the calibration.
The lifetime guarantee is nice, and the price is relatively low for a new MAF, which makes them attractive. However, expect to have some issues if you choose to go this route.
I've posted previously regarding the calibration issues with a Micro-Tech MAF and calibration settings that work. Lately I've been seeing some additional temperature sensitivity.
With the same MAF calibration, I'm seeing slightly rich BLMs (typically low 120s) in the morning when the ambient air temp is in the 50s, and slightly lean BLMs (low-mid 130s) later on when it warms to the 60-70 F range.
This is primarily occurring in BLM cells 7, 11 and 15 while in a steady cruise.
This behavior isn't completely undesireable, but can be annoying when dialing in the MAF calibration in an attempt to nail the BLMs.
I guess I'll wait for a nice 75 degree day to normalize my calibration for this temperature.
Due to these issues with the Micro-Tech MAFs, I would avoid them, unless you can stay on top of the calibration.
The lifetime guarantee is nice, and the price is relatively low for a new MAF, which makes them attractive. However, expect to have some issues if you choose to go this route.
I'll return the favor and still sorting it out, but we got a bad batch of GM 02 sensors. Upon changing headers the mufflers shop I used did a really crappy (looked nice) job on the off road pipes and we were haunted by leaks that was killing 02 sensors. After three trips back and forth the leaks were finally fixed but the 02’s were killed again. Bought two Delco 02 sensors from a dealer and the Tech II acted like there was another leak but we couldn’t find another leak. We switched sides and the lazy sensor followed doing the same thing on the other side.
Returned the 02 to the dealership and got another and I’ll be damned, it did the same thing. Went to an O’Reillys purchasing a Delphi 02 sensor (same thing) and it was bad also. Finally after buying two bosch 02’s the problem went away.
The parts guys at the dealership seem to be standup guys saying they had never heard of the problem but I’m going to follow-up more with GM on the issue. This is more than a little strange but it has to be the 02’s.
Racer
Joined: Dec 2003
Posts: 454
Likes: 0
From: Double Oak TX
Rich in the morning, lean in the afternoon.
I've posted previously regarding the calibration issues with a Micro-Tech MAF and calibration settings that work. Lately I've been seeing some additional temperature sensitivity.
With the same MAF calibration, I'm seeing slightly rich BLMs (typically low 120s) in the morning when the ambient air temp is in the 50s, and slightly lean BLMs (low-mid 130s) later on when it warms to the 60-70 F range.
This is primarily occurring in BLM cells 7, 11 and 15 while in a steady cruise.
This behavior isn't completely undesireable, but can be annoying when dialing in the MAF calibration in an attempt to nail the BLMs.
I guess I'll wait for a nice 75 degree day to normalize my calibration for this temperature.
Due to these issues with the Micro-Tech MAFs, I would avoid them, unless you can stay on top of the calibration.
The lifetime guarantee is nice, and the price is relatively low for a new MAF, which makes them attractive. However, expect to have some issues if you choose to go this route.
I've posted previously regarding the calibration issues with a Micro-Tech MAF and calibration settings that work. Lately I've been seeing some additional temperature sensitivity.
With the same MAF calibration, I'm seeing slightly rich BLMs (typically low 120s) in the morning when the ambient air temp is in the 50s, and slightly lean BLMs (low-mid 130s) later on when it warms to the 60-70 F range.
This is primarily occurring in BLM cells 7, 11 and 15 while in a steady cruise.
This behavior isn't completely undesireable, but can be annoying when dialing in the MAF calibration in an attempt to nail the BLMs.
I guess I'll wait for a nice 75 degree day to normalize my calibration for this temperature.
Due to these issues with the Micro-Tech MAFs, I would avoid them, unless you can stay on top of the calibration.
The lifetime guarantee is nice, and the price is relatively low for a new MAF, which makes them attractive. However, expect to have some issues if you choose to go this route.
I'll return the favor and still sorting it out, but we got a bad batch of GM 02 sensors. Upon changing headers the mufflers shop I used did a really crappy (looked nice) job on the off road pipes and we were haunted by leaks that was killing 02 sensors. After three trips back and forth the leaks were finally fixed but the 02’s were killed again. Bought two Delco 02 sensors from a dealer and the Tech II acted like there was another leak but we couldn’t find another leak. We switched sides and the lazy sensor followed doing the same thing on the other side.
Returned the 02 to the dealership and got another and I’ll be damned, it did the same thing. Went to an O’Reillys purchasing a Delphi 02 sensor (same thing) and it was bad also. Finally after buying two bosch 02’s the problem went away.
The parts guys at the dealership seem to be standup guys saying they had never heard of the problem but I’m going to follow-up more with GM on the issue. This is more than a little strange but it has to be the 02’s.
