# Toyota MR - 2 91 turbo

**URL:** <https://community.cartalk.com/t/toyota-mr-2-91-turbo/72965>\
**Category:** Maintenance/Repairs\
**Created:** [June 9, 2012, 8:10pm UTC](https://community.cartalk.com/t/toyota-mr-2-91-turbo/72965 "2012-06-09T20:10:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Vkays](https://avatars.discourse-cdn.com/v4/letter/v/f1d935/32.png) [@Vkays](https://community.cartalk.com/u/Vkays)\
**Post date:** [June 9, 2012, 8:10pm UTC](https://community.cartalk.com/t/toyota-mr-2-91-turbo/72965/1 "2012-06-09T20:10:14Z")

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I recently took my car to a repair shop for a leak in the water hose from the radiator to the engine. I have had a recurring problem for several years. When I had repairs done last summer, they tried to fix the problem and thought it was a vacuum issue. It was not fixed. When I drive the car and I punch the throttle in 3rd, 4th, or 5th gear. The turbo starts to wind up. At a certain point the engine acts like it is not getting enough air, I think, and starts to lose power. The spark plugs indicate too much gas.The repair people do not have a solution yet.  
One MR - 2 person who has worked on his car, says it could be the TVIS butterfly (it has 8 air ports?) when the MR-2 starts up only 4 of the 8 ports are open. When the turbo reaches 3500 to 4000 RPM, it is supposed to open the other 4 ports to put more air into the system.

Does that seem reasonable?

Vernon