[Z06] 1st - 4th Skip Shift Engagement
Safety Car
Joined: Jan 2008
Posts: 4,797
Likes: 52
From: Boise
Add engine has to be warmed up to that list....at least that's what I've noticed
seems like it's between 2200 and 2700 rpm for me....really sucks when you are making a left turn with oncoming traffic
seems like it's between 2200 and 2700 rpm for me....really sucks when you are making a left turn with oncoming traffic
Le Mans Master
Joined: Dec 2001
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From: Winchester TN
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St. Jude Donor '03-'04-'05-'06-'07-'11
Hi 2003Z06LS6 -
CAGS stands for Computer Assisted Gear Selection and is on 1994 and on cars with 6 speed transmissions. It's purpose is to improve gas mileage and avoid the "gas-guzzler" new car tax. CAGS comes into play under the following conditions:
* you're in 1st gear (of course)
* you're at 35% throttle or less
* you're between 15 and 21 mph
* engine coolant temperature is greater than 171 F (77 C)
This will energize the skip-shift solenoid and force a 1st to 4th shift. What happens is you'll be moving happily along when suddenly the "Skip Shift" light goes on in the dash. At this point you will be locked out of 2nd and 3rd. You simply cannot shift into them. At this point several options are available to you:
* shift into 4th
* shift into 5th
* shift into 6th
* coast in neutral until the RPMs drop and CAGS is disengaged
* open up the throttle a bit more and shift into 2nd or 3rd
Interestingly, 1st gear is determined by the PCM calculating from the speed sensor input and the RPM values. Disconnecting the solenoid connector disables CAGS but an error code 84 WILL be set if the PCM does not measure voltage at the solenoid connection to the computer for a period of 26 secs. This code is stored but will NOT light the Service Engine light. Apparently Chevy correctly anticipated the rush for owners to disable this function. A resistor inserted in the connector will allow voltage to the PCM input and prevent this code setting but who cares since the code is reference only.
If you install the CAGS defeat device (or fashion one yourself) you will still see the 1-3 shift indicator light on the instrument display.
If you intend to have the car professionally tuned (or have HP tuners etc.) you can eliminate the CAGS by taking one of the parameters out of range (such as taking the specified trigger mph to 300 etc). In this way you will no longer have to endure that nag-light on the dash.
best regards -
mqqn
Originally Posted by f-body.org
CAGS stands for Computer Assisted Gear Selection and is on 1994 and on cars with 6 speed transmissions. It's purpose is to improve gas mileage and avoid the "gas-guzzler" new car tax. CAGS comes into play under the following conditions:
* you're in 1st gear (of course)
* you're at 35% throttle or less
* you're between 15 and 21 mph
* engine coolant temperature is greater than 171 F (77 C)
This will energize the skip-shift solenoid and force a 1st to 4th shift. What happens is you'll be moving happily along when suddenly the "Skip Shift" light goes on in the dash. At this point you will be locked out of 2nd and 3rd. You simply cannot shift into them. At this point several options are available to you:
* shift into 4th
* shift into 5th
* shift into 6th
* coast in neutral until the RPMs drop and CAGS is disengaged
* open up the throttle a bit more and shift into 2nd or 3rd
Interestingly, 1st gear is determined by the PCM calculating from the speed sensor input and the RPM values. Disconnecting the solenoid connector disables CAGS but an error code 84 WILL be set if the PCM does not measure voltage at the solenoid connection to the computer for a period of 26 secs. This code is stored but will NOT light the Service Engine light. Apparently Chevy correctly anticipated the rush for owners to disable this function. A resistor inserted in the connector will allow voltage to the PCM input and prevent this code setting but who cares since the code is reference only.
If you intend to have the car professionally tuned (or have HP tuners etc.) you can eliminate the CAGS by taking one of the parameters out of range (such as taking the specified trigger mph to 300 etc). In this way you will no longer have to endure that nag-light on the dash.
best regards -
mqqn
Racer
Joined: Sep 2007
Posts: 480
Likes: 0
From: Laredo Texas
Hi 2003Z06LS6 -
If you install the CAGS defeat device (or fashion one yourself) you will still see the 1-3 shift indicator light on the instrument display.
If you intend to have the car professionally tuned (or have HP tuners etc.) you can eliminate the CAGS by taking one of the parameters out of range (such as taking the specified trigger mph to 300 etc). In this way you will no longer have to endure that nag-light on the dash.
best regards -
mqqn
If you install the CAGS defeat device (or fashion one yourself) you will still see the 1-3 shift indicator light on the instrument display.
If you intend to have the car professionally tuned (or have HP tuners etc.) you can eliminate the CAGS by taking one of the parameters out of range (such as taking the specified trigger mph to 300 etc). In this way you will no longer have to endure that nag-light on the dash.
best regards -
mqqn
Le Mans Master
Joined: Dec 2001
Posts: 7,788
Likes: 6
From: Winchester TN
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St. Jude Donor '03-'04-'05-'06-'07-'11
Tech Contributor
Joined: Oct 1999
Posts: 41,044
Likes: 9,808
From: Charlotte, NC (formerly Endicott, NY)
Or you can shift to second before 15 or after 20 and avoid skip shift altogether. That way you don't have to spend any money. Just takes a little training of the right foot.
Bill
Bill
Safety Car
Joined: Jan 2008
Posts: 4,797
Likes: 52
From: Boise
This is true but every now and then when you arent thinking it will catch you off guard and then you look like a tool as people almost rear end you.
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