scoobydoo101272

Hi my WRX isnt running smooth (standard car)

The main problem is when changing down through the gears i get a shuddering as i let the clutch out, could this be a clutch problem? and also when booting it, she misses a beat sometimes. Any ideas would be helpful.

Thanks..

Dark Blue Mark

May well be the dump valve stuck, although if its when the clutch bites it will be a clutch problem. Have you checked the fluid level? It may be a bit sticky and springing closed. Take the DV off and give it a clean... Is it standard or aftermarket?

Hesitation when booting it could be the o2 sensor. Is it when building boost or flat out?

MB

scoobydoo101272

The car has done 88,000 the clutch was last changed at 55,000, hesitation is usally when building boost. Just got the car so dont know much about um, havent checked the levels yet, doesnt have a dump valve yet.

Thanks for the help..

Dark Blue Mark

Your car does have a dump valve as standard, all turbo cars will. I suspect its not that but worth cleaning anyway

If its when building up boost, more than likely the lambda / 02 sensor needs replacing. Do a search on this. On your car, its located in the exhaust headers under the front bumper, on the drivers side. Its a couple of inches long and has 3 wires coming from it, threaded into the exhaust.

It controls fuelling off boost, and they quite frequently break

Could be a number of things. Not sure on the clutch.

MB