Toyota MR2 Message Board - View Single Post - 4A-GE MK1 Engine TVIS, not sure if tis my Culprit or not.

Xenon676 · 09-19-2009, 07:05 PM

As i am not sure how to test the TVIS or what its operational parameters are, I am not sure if its my problem.

1985 MK1 - 4AGE n/a

My problem is this, in throttle I get sketchy response from the engine until about 2900 RPM. at that time the throttle response is what it should be. But, (LOL there always is a but) If I still get to much into throttle its response returns to sluggishness. In other words at 2900 RPM if the throttle is partially applied it accels very nicely. If i try and accelerate it even harder it returns to the slug state. If the TVIS is not the problem then I am almost sure its the throttle position sensor. But I'd like input from someone that knows more about the TVIS then I do. Anyone got some awesome advice?

09-19-2009, 07:05 PM	#1 (permalink)
Xenon676 Cage Fighter Join Date: Sep 2009 Posts: 140 Thanks: 2 Thanked 2 Times in 2 Posts iTrader Rating: (0/0% )	TVIS, not sure if tis my Culprit or not. As i am not sure how to test the TVIS or what its operational parameters are, I am not sure if its my problem. 1985 MK1 - 4AGE n/a My problem is this, in throttle I get sketchy response from the engine until about 2900 RPM. at that time the throttle response is what it should be. But, (LOL there always is a but) If I still get to much into throttle its response returns to sluggishness. In other words at 2900 RPM if the throttle is partially applied it accels very nicely. If i try and accelerate it even harder it returns to the slug state. If the TVIS is not the problem then I am almost sure its the throttle position sensor. But I'd like input from someone that knows more about the TVIS then I do. Anyone got some awesome advice?