Hi!
I have 89 s2 rs turbo and just got plates today.
Car runs quite ok when driving without no boost under 0 psi.
When i press the gas and the boost starts to rise the car goes so lean that the normal afr meter goes off the range lean so i stop immediately the boost rise. I can feel the car does not run correctly under boost.

Coupe of checks i did made:

-Ignition advance is correct
-Gas return line removed and measured in bottle, i think fuel pump ok.
-New spark plugs
-All hoses ok, no leaks.



Any ideas?

The car is stock except kent 35 cam and 2.5" free flow exhaust, standard air filter etc.

 

sound like the fuel pressure regulater is fucked its on the side of the metering unit little black or grey box

 

or your tps senser is not set correctly

 

Okay thanks for the replys.. : )

I try to get another ke-jet fuel distributor to test if will help, i will go ms-efi later this year so i i want to put car working as minimal cost as possible. I did read somewhere there is some adjustment screw in distributor under the fuel pressure regulator? Should i try adjust it first, or replace directly whole ke-jet fuel distributor unit?

Imagine what would been happen if i dont have afr meter

ps. If you have 100% sure working fuel distributor unit pm for me

 

u can do it ur self but i think it only needs a little turn not even 1/4turn

 

i did change the fuel distributor unit and the problem is now gone.

 

do u mean the little box on the side of the metering unit, fuel pressure regulator

 

I mean the whole ke-jetronic fuel distributor

http://www.southportfuelinjection.co...c_fueldist.jpg