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Engine / Exhaust problem!?
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Old 09 Jul 2008, 01:17 AM   #1 (permalink)
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Engine / Exhaust problem!?

Hi all,

Currently got my WRX in the garage for investigation into excessive soot around the exhaust area (by excessive I mean the entire back end of the car is covered in a sooty black (non-oily) deposit, especially around the exhaust pipe.

Garage (specialist japanese car performance place) seem to think that there's nothing wrong with the car and the soot is normal, given that the car has some mods (New Motec ECU, STI intercooler, HKS SSQV B.O.V, Blitz Nur Spec R cat-back exhaust and an upgraded fuel system) Excuse they've given me is that it's sposed to be sooty as it 'protects' the engine from detonation which would be caused if they reduced it's fuel supply. (surely that's one of the jobs of engine sensors / ECU?) Their suggestion was to wash back of the car more regularly.........

One of my friends who's very into his cars, but has no Scooby experience, thinks it's simply a case of it over-fueling and that in time this will damage the engine?

I'm starting to wonder just how good this 'specialist' garage actually is and if I'm being fobbed off with a complete pile of crap to cover the fact they fitted the ECU and maybe didn't map it correctly, or the ECU they've used isn't compatible with all the engine sensors? Does this sound like a load of crap, or does anyone have any ideas?

I've spent a fortune with this particular garage over the last year just to keep the car on the road as the local Scooby garage won't touch it due to the mods it has and it's getting to the point that the car is gonna break me - this specialist japanese place isn't cheap and I'll be rather upset if I'm being ripped off - trouble is, whilst I know how drive the thing and enjoy having a car with some power behind it, I don't know the first thing about how it works. Getting to the point where I'm gonna have to pay to take it somewhere else and get them to look at it too, as I'm not sure I can trust the place I'm using atm

Anyone got any ideas?

If anything else goes wrong, it'll have to go as I'm running out of cash! Spent fixing it, what I spent buying the sodding thing now! EEK!

Cheers!
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Old 10 Jul 2008, 07:13 PM   #2 (permalink)
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Re: Engine / Exhaust problem!?

Anyone?
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Old 10 Jul 2008, 07:14 PM   #3 (permalink)
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Re: Engine / Exhaust problem!?

isn't Bob Rawle in your area?? might be worth a conversation

it does sound like over-fuelling but how bad/detrimental is difficult without actually checking the lambda, etc..................it also depends on use as a track/competition type car will often be mapped slightly richer due to more extreme temps
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