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#17526 of 19336 Re: Turbo starvation [kurtamaxxxguy]
Dec 06, 2007 (7:28 pm)
There are two banjo bolts - one on each side of the engine, near the camshafts. They are used to provide oil flow to the AVCS system, not the turbo. There is a service bulletin by Subaru to remove the small filters inside the bolts because sometimes they break and clog the line, causing problems with AVCS, most common of which is rough idle. These filters are not needed and can be removed before they break. You can either do it yourself of have the dealer do it.
Reference service bulletin TSB 02-97-05 AVCS Union Screw Filter Removal. This applies only to 2004 Turbo Forester XT. Later models don't have these filters anymore.
Look on scoobymods for more info.
#17527 of 19336 Re: Any No.VA folks confirm Weak 08 Legacy A\C? [fendertweed]
Dec 06, 2007 (7:38 pm)
Especially with the large glass area in the wagons, tinting the windows makes a big difference. Dark tint or light tint, it's all good... any tint helps tremendously.
Dec 06, 2007 (9:13 pm)
forcedinduction was pretty specific in their 12-1-07 post, but yes, they did comment that removing the screens in the banjo bolts would help.
part of the doc text follows:
"Turns out that there is an oil filter screen built into the factory oil feed banjo bolt at the cylinder head, and Subaru wants it either serviced regularly or removed completely in order to avoid turbocharger oil starvation and failure. The Subaru Service Technicians (from dealerships) we interviewed on this subject reported recurring turbocharger failures even on completely stock 2.5 WRX, STi, Forrester and Baja vehicles due to this problem, prompting an Official Subaru Service Bulletin in October 2007.
This turbo screen is not to be confused with the screen that filters the oil for the AVCS valve which does not affect turbo oil supply since it is after the "tee" that splits off the oil supply line to the turbo."
so should I get a subie with turbo, I'll keep that, as well as using synthetic oil, fully in mind.
#17529 of 19336 Re: a bit of info [kurtamaxxxguy]
Dec 07, 2007 (4:01 am)
Yeah, I've seen blown turbos on subies, but 100% of them were due to either:
A) Poor maintenance (10k oil changes w/non-synthetic)
B) Poorly done upgrades (higher boost levels, ECU upgrades w/o proper supporting upgrades, etc)
On stockers taken care of properly I haven't seen any failures. If you drive it hard you should be doing 3k-4k oil changes anyway. If you drive it like a little old lady to church on sunday then 7k is probably ok, but who buys a turbo to drive like a little old lady?
#17530 of 19336 sporadic idle on 93 subaru legacy
Dec 07, 2007 (6:00 am)
I have a 93 Subaru Legacy.It started to have problems with the idle while stopped at a light. The RPM's will fluxuate from 500 to 1500 rpms sometimes to the point of killing the engine.
The maddening thing about this, is that it is very sporadic. It happens usually when engine is hot.
Anyone have any suggestions? These are the things that I have tried:
Changed plugs and cables
Changed fuel filter (2x's)
Any suggestions would be great! Thanks
#17531 of 19336 Re: sporadic idle on 93 subaru legacy [ensino]
Dec 07, 2007 (7:46 am)
I have a 93 Legacy as well and had the same problem. I had my oxygen sensor replaced and that solved it. Are you also having trouble starting up the car at times?
Hope this helps.
#17532 of 19336 Re: Any No.VA folks confirm Weak 08 Legacy A\C? [fendertweed]
Dec 07, 2007 (12:29 pm)
I can ease your concerns...
It's not so much the cooling capacity, which is actually fine, it's the temperature controls and especially the defrost.
People don't like that the auto climate control takes control away from them basically. Also, the temp sensor aren't always consistent.
Dec 07, 2007 (1:07 pm)
One other forum I've visited had a lengthy topic regarding Subaru Hesitation due to, in 2005, their adopting the "throttle by wire" (electronic control of throttle) approach.
Is this fact or fiction? Is it more acute with Turbos? That's the last thing I need when driving in heavy traffic.
FYI, My Malibu Maxx also uses throttle by wire, and has no hesitation issues.
#17534 of 19336 Re: Hesitation [kurtamaxxxguy]
Dec 07, 2007 (4:04 pm)
I have noticed that stomping the pedal extracts a slower response from the vehicle than easing into it. Easing into it, the thing will take off like a rocket. When passing, a quick punch about 1/2 - 3/4 down will elicit a fast response to shift down 2 gears, but stomping it to the floor causes a short delay before it performs the same action. I am not sure if it is caused by TBW, but I never experienced delays with my old '96 Subaru, even though it also performed better with more controlled movements of the pedal. Because of this, I expect it likely is related to TBW.
Intuitively, I doubt it would be any different for the turbo versions save for the added power punch when the turbo itself kicks in, making it feel like there is some extended lag even if there is not.
#17535 of 19336 Re: Hesitation [xwesx]
Dec 07, 2007 (8:00 pm)
No TBW issues or hesitation in my 05 LGT Wagon, even on the race track.