What to tune first
Thread Starter
Registered User
Joined: Feb 2004
Posts: 12
From: HOUSTON
What to tune first
Greetings all, I want to learn how to tune my 1994 Z28. The net has so much info on software, tools, techniques, etc that its kind of overwhelming.
My questions is in what order do you like to tune your PCM? Do you prefer to tune the MAF then VE then PE ,etc?
Hoping your feedback will help narrow down my focus of reading.
My Car details..
1994 z28 A4
Long tubes, straight 3" y pipe, magnaflow catback
58mm, CAI, ported ends & de-screened MAF (came that way going back to a stock MAF)
3:43, 1LE driveshaft, with stock suspension
Deleted AIR, ABS, CATs, AC, EGR
Using Cats, tunerpro, Scan9495, and AGX Wideband installed.
My questions is in what order do you like to tune your PCM? Do you prefer to tune the MAF then VE then PE ,etc?
Hoping your feedback will help narrow down my focus of reading.
My Car details..
1994 z28 A4
Long tubes, straight 3" y pipe, magnaflow catback
58mm, CAI, ported ends & de-screened MAF (came that way going back to a stock MAF)
3:43, 1LE driveshaft, with stock suspension
Deleted AIR, ABS, CATs, AC, EGR
Using Cats, tunerpro, Scan9495, and AGX Wideband installed.
Last edited by TSAEB; Feb 8, 2019 at 03:55 PM.
Registered User
Joined: Aug 2005
Posts: 39
From: Las Vegas
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Joined: Nov 1998
Posts: 71,086
From: Hell was full so they sent me to NJ
Re: What to tune first
Since your setup is basically “bolt on”, the first thing you need to do is run a data log under a wide range of operating conditions as a measure of the health of the control system, and adequacy of the stock tune.
https://www.camaroz28.com/forums/com...95-lt1-874306/
Then learn how to read the data, looking for weak points and problems, or post the data log here so one of us can help you.
https://www.camaroz28.com/forums/com...-guide-886891/
The worst thing you can do is start tuning without insuring all the sensors and actuators are good and doing their job. For example, to cure a problem with unacceptable long term fuel corrections by altering the MAF calibration is not the way to do it, until you have verified the performance of the O2 sensors, problem free injectors, absence of exhaust leaks, vacuum leaks, etc..
https://www.camaroz28.com/forums/com...95-lt1-874306/
Then learn how to read the data, looking for weak points and problems, or post the data log here so one of us can help you.
https://www.camaroz28.com/forums/com...-guide-886891/
The worst thing you can do is start tuning without insuring all the sensors and actuators are good and doing their job. For example, to cure a problem with unacceptable long term fuel corrections by altering the MAF calibration is not the way to do it, until you have verified the performance of the O2 sensors, problem free injectors, absence of exhaust leaks, vacuum leaks, etc..
Thread Starter
Registered User
Joined: Feb 2004
Posts: 12
From: HOUSTON
Re: What to tune first
Since your setup is basically “bolt on”, the first thing you need to do is run a data log under a wide range of operating conditions as a measure of the health of the control system, and adequacy of the stock tune.
https://www.camaroz28.com/forums/com...95-lt1-874306/
Then learn how to read the data, looking for weak points and problems, or post the data log here so one of us can help you.
https://www.camaroz28.com/forums/com...-guide-886891/
The worst thing you can do is start tuning without insuring all the sensors and actuators are good and doing their job. For example, to cure a problem with unacceptable long term fuel corrections by altering the MAF calibration is not the way to do it, until you have verified the performance of the O2 sensors, problem free injectors, absence of exhaust leaks, vacuum leaks, etc..
https://www.camaroz28.com/forums/com...95-lt1-874306/
Then learn how to read the data, looking for weak points and problems, or post the data log here so one of us can help you.
https://www.camaroz28.com/forums/com...-guide-886891/
The worst thing you can do is start tuning without insuring all the sensors and actuators are good and doing their job. For example, to cure a problem with unacceptable long term fuel corrections by altering the MAF calibration is not the way to do it, until you have verified the performance of the O2 sensors, problem free injectors, absence of exhaust leaks, vacuum leaks, etc..
Thank you, this is some very good reading.
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