Hi I'm having an intermittent problem with my 04 subaru Impreza wrx. When I drive the car under normal driving conditions it's great no problems at all. When I drive it under full load it gets to between 2500 and 5000 rpm I get 1 or 2 pops from the exhaust and it's good again go into the next gear and same again but it doesnt happen all the time when driving like this. I've replaced the spark plugs all the coils and a test on the maf sensor came back working as it should. Theres no lights on the dash no flashes of lights when it does this and a diagnostic machine test came back with no faults on the engine.

 

Is the car standard?

 

No. All was done by previous owner performance cams fully decatted full 3inch custom exhaust performance panel filter all silicone hoses stage 1 remap and walbro 255 fuel pump

 

Are you sure its mapped for the mods correctly.

 

That my friend has been in the back of my mind awhile now but dont wanna waste £200 plus

 

Get it on a rolling road, they will be able to check afr`s and see any issues.

 

Will get that done and see the outcome. Thanks

 

DET,as above get it checked before you kill the engine!

 

You can do afrs with a laptop, cable and romraider free version can't you?
I'm sure that's what I used a few years ago.

 

Check I mean

 

No
you need a wideband o2 sensor and gauge/software