Overboost? Pop, funky smell!
Thread Starter
Burning Brakes
Joined: Oct 2003
Posts: 790
Likes: 29
From: Norfolk, England
Overboost? Pop, funky smell!
Nice cold day today, car has been pulling like a train. A couple of times, under hard acceleration in third gear I had a 'pop' kind of misfire followed by a funny smell! I could feel a little stutter.
This happened a few other times in various gear through out the day under hard accel.
My mechanic friend suggested it may have been a touch rich and the smell was fuel in the cat?
I thought it sounded like an intake 'pop'.
Either way she's going like a missile. Perhaps I need to wind the wastegates in a bit to ease the 'on boost' transition!
This happened a few other times in various gear through out the day under hard accel.
My mechanic friend suggested it may have been a touch rich and the smell was fuel in the cat?
I thought it sounded like an intake 'pop'.
Either way she's going like a missile. Perhaps I need to wind the wastegates in a bit to ease the 'on boost' transition!
Thread Starter
Burning Brakes
Joined: Oct 2003
Posts: 790
Likes: 29
From: Norfolk, England
I've just read this on a subaru forum - kind of ties up with what my friend (mechanic of 25 years) suggested!
Ignition and rich-running misfires tend to stink, like sulfur or rotten eggs, because of unburned fuel dumping into the exhaust.
Lean-running misfires are not so distinctive in smell.
Too much cold air creating too much overboost I guess then :O)
Ignition and rich-running misfires tend to stink, like sulfur or rotten eggs, because of unburned fuel dumping into the exhaust.
Lean-running misfires are not so distinctive in smell.
Too much cold air creating too much overboost I guess then :O)
Rennlist Member
Joined: Nov 2004
Posts: 2,934
Likes: 35
From: Vancouver BC
have you had the battery off recently? particularly cool weather? You have the rs tuning motronic if I recall. It might be the ecu detecting detonation/ignition cut out under load if your ecu is relearning its limits? I've been instructed to take things easy for a bit after the battery has been disconnected.
