hi guys i got my dezod s1 turbo kit installed and tune..... but after tune my car rpm go up down by himself... this is making me crazy ... i take it back to the tuner they try to fix it but car still the same .... for examplo im in 5 gear when i get to the light that i put my car in neutral it start to go up and down and sometimes it turn off.... this is making me crazy....
how should i solve this problem....

 

check all your vacuume lines make sure they are nice and tight. sounds like you have a vacuume leak. also make sure your engine managment system is running on its own vacuume source and it doesnt have anything T'd into it mid line.

 

i have my engine management connected to the dezod vacuum manifold but in the middle of the engine management vac line i have a conector that take the line frim skiny to a little more fat so i can plig it into the dezod manifold vacuum

 

You're changing diameter of the line?

 

sounds like it.

 

Yes I'm changing diameter of the line cus the line that connect to the fix is very skinny to plug it into the dezod vacuum manifold ... So I have a conector in the middle that change it from skinny to a little more fat

 

many things can do this, leaks (boost and vac), maf damaged or not seated, and so on.
Have you had a cel pop up on ya?

 

yes i have check engine i take to autozone and it could be
maf problem
02 sensor
catalytic converter
fuel system
thats the things that i remenber when i take it to autozone

 

ask them for the code..

 

i thought u can T off the map sensor for vac. on the vac. block..

 

p0420

 

p0420 is common...nothing big to worry about really, this code comes up when you have removed the cat. stick on an antifouler on the secondary o2 sensor (search scionlife for "antifouler trick") and that should keep that code away.

was that the only code?
have you done a boost leak test (search on youtube "boost leak test")

 

You're not supposed too the map sensor should have an un interrupted vac sorce coming off a vac block is fine but nutting something mid line isn't the best idea.

Sent from my DROID incredible

 

oh... you mean just dont use the map sensor line to tap into another line ex. bov and etc thanx i dont think i have done that but... it was good to know lol

 

I recommend sourcing the correct fitting for the vac manifold and not stepping the diameter down at all first off.

Secondly, make the FIC have it's own independent vac line too.

Third, the CEL for lack of a cat is normal as you removed the stock one.