Really powerful cold engine, warm not so fun.. :-/
 

Any ideas? Redoes 6 v6 1995

1 When I'm driving it in the morning the car feels really good and response fast.

When the engine is warm and after a while it feels slow and weak.. :-/


2 Also I'm thinking about getting an open airfilter to the car. Is it any special i should have?

3 Is it possible to use any chip to the car. ?

Any error codes?
Maybe the knocksensor is going to die....

Why do you think its this nocksensor?

because if the knock sensor is broken ur engine has no power.....
but if he is really broken there must be an error code in your system....

don't do that - you will lose power. the air intake is part of the VRIS-system and has been well designed by the engineers.

yes, it's possible. but what for? unless you have a turbo charger, changing the software won't give you more power. better spend the money on new spark plugs, spark plug cables etc.

cheers

I only have one faultycode 41 vris solenoid ( 4 short - paus - 1 )
Ive had this before and it was the connection.

Also i noticed when im driving with half gasoline tank it behaves like it doesnt get enough gasoline. Maby the filter inside the tank??


It feels sometimes lite the car only sound powerful but the speed is not the same. Often when its warm. I want to feel that punch when you hit the gaspedal even in slow speed.

Its a automatic gearbox!
Ive changed the oil! :)

Have you checked if the VRIS valves are working when the car/engine is warm?

Fuelpump
 

I fixed the vris 1!

But still problem with this slow reaktion and when I'm hitting the gaspedal its a quick stuttering.

I have all this time problem with a half gas tank and less that it stutter and feels weird so is it the fuel pump maby?

Is it easy to exchange? inside the car?

You really should check the Fuel Pump.

Yes, by messuring the fuel pressure in the rail.
Should be around 3-3,5 bar.

after you checked the pressure, you should also check the flow rate. it's rather simple. you need to find the return flow hose after the injection nozzles and AFTER the pressure regulator (it's a small thing in the size of a thumb with 2 connections for fuel and 1 for air pressure adjustment). detach the hose at the side of the regulator where the fuel goes back to the tank and attach another hose instead which you will run to a container (e.g. a 1.5l PET-bottle). then you need to bridge 2 pins in the "diagnose" box to make the fuel pump running continuously as soon as you switch on the ignition but WITHOUT starting the engine - follow the service manual to find the right pins. as soon as you switch on the egnition, start your chronograph. switch ignition off after 30sec. check the amount of fuel in the container. it should be 0.5 to 1.0l (therefore, the container must be big enough!!).
these instructions are "on your own risk". don't forget: fuel is easily ignitable - playing around with this stuff is dangerous and you should really know what you are doing!

best regards & good luck