So my issue comes when accelerating. Under very light throttle pressure (between 1%-10%, like the amount you'd give it when trying to maintain speed) my car will kind of stutter through for moments, my afr will run rather lean, and then it'll fix itself after five to ten seconds. It's really annoying. In evoscan my throttle position is 13%, so where it should be. I have no idle issues or WOT issues. I have no engine codes or anything. The only other thing I tried was swapping on an extra maf I had laying around from an Evo 6. I believe it's a tps, as I've seen a similar issues on a few customers cars. Thanks for any input folks.

 

My evo 8 does this also and I am waiting for my laptop to do some logs I have heard it's an I jector scaling thing but I need to look into it more

 

I don't really see how it could be injector scaling. I'm currently back on the stock 6 rom with 560cc injectors hoping it was a tune issue. Problem still persists.

 

Hi Ferp

Read this thread here that discusses TPS issues /EVO scan & the percentages that are normal & out of range

Also, heres a portion of manual that shows how to test the TPS sensor using a voltmeter


https://www.evolutionm.net/forums/ev...djustment.html

 

the dvom will help but to better diagnose a tps you need to graph it and perform a snap throttle test. the sample rate of a dvom is slow.