DIY Fix Common EvoX Idling Problem

[johnsonlam]

This applied to EvoX and It might be applicable to other Evos with the same symptom...

Symptom : Rough Idling after spirited drive, Boosts or when is engine hot...

What to do? : Check the Fuel Pressure Regulator Vacuum Hose

http://www.zerotohundred.com/newforums/members/johnsonlam-albums-diy-fix-common-evox-idling-problem-picture10035-disconnected-vacuum-hose-to-intake-manifold.jpg

I searched in Google on this symptoms and was surprised to find more than 20 EvoX owners having this issue...

Here is the zoomed out view. It is located under the engine cover... So just remove the plastic cover for a better view.

http://www.zerotohundred.com/newforums/members/johnsonlam-albums-diy-fix-common-evox-idling-problem-picture10034-evox-vacumm-hose-to-intake-manifold-disconnected-by-itself.jpg

A simple fix will be just to cable tie it...
however, I take an additional step to ensure it will not happen again.

I realised the hose was hardened, probably due to the heat, so... I am replacing it with Silicon Hose.

http://www.zerotohundred.com/newforums/members/johnsonlam-albums-diy-fix-common-evox-idling-problem-picture10033-using-a-better-quality-silicon-vacuum-hose.jpg

Just cable tie it back to the original positions, and it's DONE!

http://www.zerotohundred.com/newforums/members/johnsonlam-albums-diy-fix-common-evox-idling-problem-picture10032-fixed-using-silicon-vacuum-hose-to-replace-faulty-old-one.jpg

Definitely fixed my Idling problem... and I think.. will get better mileage on my full tank too... we will see!

Share to all your EvoX, Ralliart, 4B11T friends... !

 

[Izso]

You mean that vacuum hose just pops out after a hard drive or high boost?

Wah

 

[johnsonlam]

You mean that vacuum hose just pops out after a hard drive or high boost?

Wah

Yeah.. Kinda silly right?
I think the 2011 EvoX onwards fixed this problem.

 

[johnsonlam]

Seen the same problem in 4 x 4B11T already...
all fixed with either cable ties or change hose.

Good Job guys!

 

[pengyu]

yeap..happened to me as well before..
cable tied it.