[ModdedSS]

Last night my check engine light came on, said reduced engine power, and rev match stopped working even when turned on. There was also a red light on that was a P in a circle with a wrench under it which would have to do with the parking brake. The car will sometimes idle high as well around 1,000 RPMs. Only mods done to the car are rotofab that I put on recently and throttle controller that I've had on for months and thousands of miles. Anyone know what the issue could be?

Thanks

[Sunsnare98]

Originally Posted by ModdedSS

Last night my check engine light came on, said reduced engine power, and rev match stopped working even when turned on. There was also a red light on that was a P in a circle with a wrench under it which would have to do with the parking brake. The car will sometimes idle high as well around 1,000 RPMs. Only mods done to the car are rotofab that I put on recently and throttle controller that I've had on for months and thousands of miles. Anyone know what the issue could be?

Thanks

It's your throttle controller. The code with read too much voltage to your accelorator. The problem arises when you mess with the airflow. If you delete the secondary cats or add a cai, it causes this issue. You basically need to take the controller out or stop going WOT

Unplug and replug in your controller and then drive it for 30 miles and a couple starts and stops. The code will clear. This issue will happen over and over again.

[Megahurtz]

Originally Posted by Sunsnare98

It's your throttle controller. The code with read too much voltage to your accelorator. The problem arises when you mess with the airflow. If you delete the secondary cats or add a cai, it causes this issue. You basically need to take the controller out or stop going WOT

Unplug and replug in your controller and then drive it for 30 miles and a couple starts and stops. The code will clear. This issue will happen over and over again.

If you delete the secondary cats? Can you elaborate?

[sub_ETCS_ret]

Originally Posted by Megahurtz

If you delete the secondary cats? Can you elaborate?

This is the second thread he has mentioned deleted secondary cats and having problems but hasn't elaborated.

Originally Posted by Sunsnare98

It's your throttle controller. The code with read too much voltage to your accelorator. The problem arises when you mess with the airflow. If you delete the secondary cats or add a cai, it causes this issue. You basically need to take the controller out or stop going WOT

Unplug and replug in your controller and then drive it for 30 miles and a couple starts and stops. The code will clear. This issue will happen over and over again.

The calibration has nothing to do with air flow. It's done with pedal position/voltage. Which is why it's done with the pedal not depressed and the pedal depressed.

Originally Posted by ModdedSS

Last night my check engine light came on, said reduced engine power, and rev match stopped working even when turned on. There was also a red light on that was a P in a circle with a wrench under it which would have to do with the parking brake. The car will sometimes idle high as well around 1,000 RPMs. Only mods done to the car are rotofab that I put on recently and throttle controller that I've had on for months and thousands of miles. Anyone know what the issue could be?

Thanks

You could try recalibrating the throttle controller or removing it.

Could you have broken something or not fully connected something during the Rotofab install?

[ModdedSS]

I'm 99% positive that nothing was broken on the rotofab install, going to re-adjust and tighten everything up again just to be sure. If it's the throttle controller could redoing the programming help fix it now that the rotofab is on, or will it not make a difference

[gw6211]

why don you quit guessing and find out what the code is. THAT is the starting point. geez, could be anything....

[sub_ETCS_ret]

Originally Posted by gw6211

why don you quit guessing and find out what the code is. THAT is the starting point. geez, could be anything....

There is that.

Sent from my SM-G920V using Tapatalk

[Sunsnare98]

Originally Posted by Megahurtz

If you delete the secondary cats? Can you elaborate?

Deleting your secondary cats changes your airflow and throttle response a bit. As a result, your throttle controller causes your throttle position sensor to think there is too much juice going into your throttle. As a result, you'll get a throttle
Position voltage CEL.

the same principle can be applied to your cai. The factory throttle position sensor has a range that it can be in without throwing codes. The vitesse at WOT pushes that boundary, and any other mods that effect throttle
Response even slightly will cause issues. Especially on a higher setting on the throttle controller.

I learned this from dealing with the issue myself. go read the code at an autozone and you'll see what I'm talking about. It has nothing to do with calibrating it.

[sub_ETCS_ret]

Originally Posted by Sunsnare98

Deleting your secondary cats changes your airflow and throttle response a bit. As a result, your throttle controller causes your throttle position sensor to think there is too much juice going into your throttle. As a result, you'll get a throttle
Position voltage CEL.

the same principle can be applied to your cai. The factory throttle position sensor has a range that it can be in without throwing codes. The vitesse at WOT pushes that boundary, and any other mods that effect throttle
Response even slightly will cause issues. Especially on a higher setting on the throttle controller.

I learned this from dealing with the issue myself. go read the code at an autozone and you'll see what I'm talking about. It has nothing to do with calibrating it.

Thanks for your explanation.

Sent from my SM-G920V using Tapatalk

[Sunsnare98]

Originally Posted by sub_ETCS_ret

This is the second thread he has mentioned deleted secondary cats and having problems but hasn't elaborated.



The calibration has nothing to do with air flow. It's done with pedal position/voltage. Which is why it's done with the pedal not depressed and the pedal depressed.




You could try recalibrating the throttle controller or removing it.

Could you have broken something or not fully connected something during the Rotofab install?

My friend...I know how a throttle controller works. The new airflow is changing the throttle position outside of the operating range. Its only because he has the throttle controller though. At WOT it pushes the throttle
Position past the range.

Like I said... the code will be throttle position voltage CEL.

[Sunsnare98]

Originally Posted by sub_ETCS_ret

Thanks for your explanation.

Sent from my SM-G920V using Tapatalk

No prob my friend. That issue puzzled me for the longest time.

[ctrlz]

Originally Posted by gw6211

why don you quit guessing and find out what the code is. THAT is the starting point. geez, could be anything....

I agree. How do you spend hundreds on "upgrades" and not invest in a code reader (like $50 at harbor freight)???

[pinoyscorpion951]

Originally Posted by Sunsnare98

Deleting your secondary cats changes your airflow and throttle response a bit. As a result, your throttle controller causes your throttle position sensor to think there is too much juice going into your throttle. As a result, you'll get a throttle
Position voltage CEL.

the same principle can be applied to your cai. The factory throttle position sensor has a range that it can be in without throwing codes. The vitesse at WOT pushes that boundary, and any other mods that effect throttle
Response even slightly will cause issues. Especially on a higher setting on the throttle controller.

I learned this from dealing with the issue myself. go read the code at an autozone and you'll see what I'm talking about. It has nothing to do with calibrating it.

In my experience this is true. I have the VTC. I went to an exhaust shop to have my secondary cats removed last year. First thing I did post install was to rev the engine to see how much louder it was over stock and got a CEL. It was related to the throttle positioning. I removed the VTC and drove home. When I got home I disconnected the battery overnight and reconnected in the morning. Reinstalled and reprogrammed the VTC and haven't had any issues since. I've done plenty of WOT runs and no more codes.

[Sunsnare98]

Originally Posted by pinoyscorpion951

In my experience this is true. I have the VTC. I went to an exhaust shop to have my secondary cats removed last year. First thing I did post install was to rev the engine to see how much louder it was over stock and got a CEL. It was related to the throttle positioning. I removed the VTC and drove home. When I got home I disconnected the battery overnight and reconnected in the morning. Reinstalled and reprogrammed the VTC and haven't had any issues since. I've done plenty of WOT runs and no more codes.

Yeah I had that same issue with my corvette. The ecu takes a couple miles to adjust to the changes and in some cases, it's within the range to not throw a code and you're good. In my case, after adding a corsa x pipe which deleted my secondary cats and adding a afe cai, it was too far out of the range and I got a CEL like once a week.

The other thing I noticed is that I only got the CEL in track mode. Tour and sport were fine because it had a less aggressive throttle setting in those modes. I finally got fed up and just had my tuner tune the throttle response to my liking.