I changed my BOV to TIAL 50mm and now the mill goes on.

DTC P0121: Throttle Position Circuit Range/Performance Probl


From what I searched its the spring on my BOV.

Does anyone know why this happens and whats the best spring...............???

2.3L 35R

Thank you.

 

Bump, I'm having the same problem

 

so am i and it only happens some times

 

weird... I have the exact same problem. TiAL 50mm valve... randomly sets this code.

 

what spring do you have?

 

I'm also getting the same code even when I changed the spring to the 11/10psi Gray/Un-painted one. I have the Tial 50mm Q, dunno if i'm supposed to get the Pink one instead.

 

what springs and who has what tune. also are you running stock line or a 1/4" ID reinforced line like the instructions say all the way to the manifold

 

I run the unpainted spring, v7 tephra mod tune w/MAF, 1/4" ID super thick fiber reinforced vacuum line... all the way to the Magnus IM.

 

Really? The vacuum line could cause this code to appear?

I'm running the stock line so what? and no, mine's is not connected to the manifold, it follows the same tube as the stock bov.

Sorry, I didn't get to read the instructions because the mechanic installed it liked that and I thought it was just fine.

 

He might be thinking that the valve isn't opening because the vacuum line is collapsing under vacuum

 

stock line restricts the heck out of the flow it needs to pull open, change that out asap

 

Could I get a copy of the instructions from the Tial Sport website???

 

yes, but i can give you the cliffs

1/4" ID reinforced line directly to the manifold from the BOV, no T's in the line
remember the flange o-ring otherwise you will have leaks

 

Allright, thank you guys!

 

i have the 9 lb spring, and i dont have any problems. Im changing it to recirculation because im running maf, so wether or not you feel problems it still is hurting it. But im using the nine lb spring and its fine.