r33 laging

[vic_sky33]

hi guys need some help,

my R33 is playing games again, just dropped a new clutch although the tacho is ok its the speedo that i can see the slowness .

does anyone know if its loosing power from clutch or laggin from somewhere else ?

[The Dan]

A way to test the clutch integrity is to put it in 4th gear, pull the handbrake on as hard as you can without breaking it and try to take off. You may have to accelerate a bit. The aim is to stop the car from stalling. If it tries to keep running or you can keep it going for a while (like 2 seconds) then the clutch is had it.

When the clutch is fully engaged, ie. your foot is not on it, the car should stall immediately no matter how hard you try.

If it stalls immediately, start looking at other things.

BTW. It would NOT be a good idea to rev it to 6000 rpm when performing this test as you'll end up like my idiot friend who drove his car through the end of his garage. Bloody GTS4 traction. 2000 rpm is enough.

[The Dan]

My second guess would be to start looking at Turbo and AFM. Check for end play in the shaft of the turbo, in that model there should be none at all. Check to make sure it spins freely, however, don't spin fast. Just turn it half a turn gently. If it appears ok, next thing to check would be the wastegate actuator. With an air pump or mightyvac you need to simulate boost pressure to ensure the actuator is working at the correct level.

How is the fuel pump? Do a flow and pressure test on the pump to make sure it is flowing at the correct rate.

Are there any error codes?

Check to make sure the AFM is clean.

Check to make sure there are no vacuum leaks from anywhere. Get a water sprayer (like hairdressers use) and soak all hose connections while the car is running to check for leaks (you will hear the idle change when it sucks up the water).

Start with those things and if they don't help, post a reply.