Ive got a 2005 sti running 352bhp.. And all of a sudden theres hardly any power.. It did this before xmas and i checked all hoses an pipes and everthing was fine so i checked airfilter and that was clean so put it back together, went out later in it that night and was running spot on all the power there, absolutly fine. The only thing i can think of is a dodgy air flow meter as that was the only thing that i had touched or disturbed :/
Hope that makes sense as im not very good at explaining aha
Thanks

 

Do you have a boost gauge fitted?

 

I dont mate but a few weeks ago it made 352 on scooby clinics rollers at 22 psi..
It aint running nothin like that now

 

has it thrown up an ecu light??

 

It hasnt no

 

fuel dodgy. Someone. Selling 95oct fuel in super 98oc pump. Making a pretty packet

most cars won't notic difference but tuned car NEEDS super.

Knock correction retarding timing

Might be boost spikes
Vac pipe leak boost pipe leak

A boost gauge would help

 

Ive disconneted battery for a while and it seem fine now :/
Last couple of days ive used tesco 99 and shell vpower
Could it be fuel?
Thanks

 

check the neutral switch, had same prob

 

Whats that mate?
Thanks

 

I was driving my wrx a few months back and was say at lights pulled off fairly quick and the power suddenly died! Literally nothing there,struggeled to get me to the nearest lay by ad i was on a dual cariageway! Only bought the car a few days before so feared the worst,but pulled over had a look around in the bay and noticed the two halves of the air box were not seated properly from the day before when I checked the air filter and I obviously didn't put it back on perfect.the extra air must of been sending the MAF wild or something??? put it on properley fired her up an sweet as again! If you are running standard air box could be the same as this? Just a suggestion!

 

Sensor on the gearbox that tells ECU car is in neutral and therefore no load.

MAF sensors always dodgy on 99 model but normally run rough/uneven

Tony