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Hey there,
I purchased a V1 Mamo from a friend for my 2016 Z06 (auto) and it worked well for about a week. On cold startup the car runs really rough spitting and popping for about 30 seconds. HPTuners shows it pulling -20 degrees of timing and relatively high kPas (40-70). Is there a sensor in the TB that could be bad? Is There a learning procedure needed? Any help appreciated.
I reinstalled the original OEM TB and have had no problems.
Well for one thing your engine isn't even warmed up yet. Did you disconnect the negative battery terminal before switching throttle bodies? There is a learning procedure involved, I'm surprised the TB seller didn't tell you about it.
Just use the throttle cleaned function in HP tuners. No need to go through the procedure if you have HPTuners. Although, this wouldn't explain why it was working properly and then stopped working properly. Seems more like it could be a loose intake tube.
I don't know about that. Maybe we need to get together and go over this cleaning procedure. I was not told by Tony when I bought this TB that there was a learning procedure or any additional steps needed when installing. The symptoms you are getting did not occur on my 15 Z06. Maybe tuning changed on the 16 making it more sensitive. IDK
The only real procedure is the "cleaned throttle" procedure in HPTuners or the MDI2 tool. Pulling the battery cable for a while allegedly resets this as well. I never do any "re-learn procedures" for any of the cars that I tune and use the Mamo TB.
I did have one car where swapping the throttle body motor and gear from the stock unit to the ported unit was required to solve the same kind of issue reported by the OP. But I think this was actually due to a bad motor on the TB that I received from the porter. The swap fixed it and I never looked back. But that was only one time and never again have I seen that issue.
One thing that I notice with extreme ported TB's is that the ECU will throw an airflow correlation error and set the CEL. Sometimes doing the throttle cleaning procedure(or battery pull) will fix this because it seems to reset the tolerance. However, there is a hard limit in the ECU to how much airflow is allowed at a given throttle percentage before it throws the code. I always tune this on cars with ported TB's so that there isn't any issues in the future.
Last edited by Internets_Ninja; Apr 27, 2021 at 10:36 AM.
The only real procedure is the "cleaned throttle" procedure in HPTuners or the MDI2 tool. Pulling the battery cable for a while allegedly resets this as well. I never do any "re-learn procedures" for any of the cars that I tune and use the Mamo TB.
I did have one car where swapping the throttle body motor and gear from the stock unit to the ported unit was required to solve the same kind of issue reported by the OP. But I think this was actually due to a bad motor on the TB that I received from the porter. The swap fixed it and I never looked back. But that was only one time and never again have I seen that issue.
One thing that I notice with extreme ported TB's is that the ECU will throw an airflow correlation error and set the CEL. Sometimes doing the throttle cleaning procedure(or battery pull) will fix this because it seems to reset the tolerance. However, there is a hard limit in the ECU to how much airflow is allowed at a given throttle percentage before it throws the code. I always tune this on cars with ported TB's so that there isn't any issues in the future.
Thanks again for the info! There were no codes thrown. I will reinstall the unit and run the procedure from HP Tuners and see what happens ;o).
I have Tony Mamos newest ported throttle body “v2” for sale for LT4 off my 2019 z06. Never had any issues with my car. Selling because going back to stock. If your interested. It’s better than the original style
OK. Reinstalled the Mamo and tried the TB learn procedure and got a basket full of codes. Disconnected the battery, reinstalled the OEM TB and let her sit all night. Reconnected the battery, cleared the codes and tried the relearn procedure (run for 3 min, off for 1 minute, run for 3 minutes). Idle was erratic and many codes were thrown.
WTF? Any ideas?
WOW. I don't know. BUT, it looks like after the battery was disconnected the ECM is back to testing the various systems and needs to be driven to complete the emissions testing. Yes?
Sounds like you need to update your HP tuners, I just added an Aem gauge and had issues after that because we added it to the HP tuners log column. Had to do an update on HP Tuners website to get it to read correctly. Once you do that you'll need to resync your Hp Tuners for the new updates.
Those are some of the codes I had also, fuel system, etc. I cleared everything, did the HP Tuners update, resynced, reflashed my saved tune and everything was fine. No issues since then and that was just last week.
Last edited by 99vetteran; May 6, 2021 at 01:59 PM.
Mamo ported throttle body issue...
