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Discussion Starter #1
I have owned my 1999 Forester Turbo S for 3 years and last September treated it to Whiteline F & R Anti-Roll Bars, Strut Brace and AP Racing 4 Pot Brake Upgrade together with 17" Wheels and Tyres. I am pleased with the results which as others have attested transform the handling. At the same time I had fitted the Hayward & Scott Classic Forester Centre Pipe and Back Box leaving the Cat and Downpipe to comply with emissions. The exhaust was at first noisy - I was told it would quieten with use which it has a little - but performance has dropped right off and fuel consumption has gone through the roof. The bottom end is very flat and mid range is no better than with the standard system. I assume that this is a combination of a slow spool to the turbo plus mapping that is way off - or should the ecu adjust automatically. Is any one out there using the Hayward & Scott system on their SF series and is it running OK or do I need a remapped ecu or even refit the standard back box. The vehicle which is an automatic is used only on road and I am looking for good torque rather than top end.

Chris M.
London

Other (Old) Vehicles :
1987 Subaru XT Coupe
1981 Fiat X1/9
 

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Sounds like you are running horribly rich ... which would suggest that there is a sensor fault. 02/Lambda at a guess, though the MAF can fail rich too.

Have you got a reliable local dealer/specialist that you use ?

Steve
 

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Discussion Starter #3
Thanks Steve,

I last used Marlborough Of Isleworth but now Broads Of Watford is nearer. If you are Cheam (?) then you are not too far either. Are you saying that the standard Subaru electronics should be OK providing they are working correctly. It has been suggested that I should fit a fully mappable ecu to do the job properly. Incidentally is it worth a full suspension alignment on Forester as is recommended for Impreza. As stated the handling has improved immensely with Whiteline ARB & Strut Brace kit - but do I also need the anti lift kit and steering rack bushes. The vehicle is daily driver - no track work.

Thanks again.

Chris M.
 

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I'm about 2 miles from Cheam, but I tend to get all my service work done at Subaru4You in Newbury :)

With only a center and backbox there is no reason you *need* a remap at all provided everything else is ok. I have a spare lambda you could borrow to try but it's out on loan at the moment.

Steve
 

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Discussion Starter #5
Steve - Thanks for the imput. I will book the vehicle in sometime. I thought you might be connected with Cheam Motors - but see now that you are not. Excuse my ignorance.

Chris M.
 

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Discussion Starter #7
Thanks Moose.

Might try that. Vehicle was OK initially but fault has developed over period of about two months - so reset might only be temporary solution. Mpg has dropped (around town) from 25 to 15 - and thats with just gentle throttle.

Chris M.
London
 

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98 JDM Stb Manual
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Thats not right, is your idle ok? Possible MAF

Steves right possible lamda failure

I have a full decat and am running slightly rich as a result, im fitting turbo and power fc to make full use of all the go faster bits though

Check your air filter is clean as well while your at it

If its gone all wooly sounds like its rich all the time as if choke is on permenant


Has this only happened in the cold weather
 

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97 s/tb
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Nich,
Have you booked for your remap yet?
Are you still having AndyF?
 

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98 JDM Stb Manual
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M8

Group buy on Power FC on snet

followed by remap by jolly green giant

aiming for new plugs, turbo, avcr, ecu, remap all in April

looking for parrallel fuel mod, FPR, oil and filter, and get my front spots working and MOT end of Feb ish

Phase 3 will be springs and wheels

Does it ever end?
 

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Discussion Starter #11
Thanks guys.

Idle was rock steady after initial fitment of new exhaust but is now lumpy - and no blockage at air filter. I'm sure Steve is right and this must be a lambda sensor problem but as I am no technician I will book in to workshop.

Chris M.
London
 

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2001 S-Turbo Auto
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CM said:
Thanks Moose.

Might try that. Vehicle was OK initially but fault has developed over period of about two months - so reset might only be temporary solution. Mpg has dropped (around town) from 25 to 15 - and thats with just gentle throttle.

Chris M.
London
Strange I thought it was normally to get 15mpg around town and average about 20-22mpg with the automatic Forester!

I guess I should look at trying a different lamda sensor, which Cheam Motors didn't bother to investigate when it was last in for a service :rolleyes:
 

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Discussion Starter #15
Yes mileage will drop with stop start - but my town driving is a gentle commute within 30 mph zones and usually fairly free flowing. With traffic I can almost see the needle move on fuel gauge - and I have already checked for leaks. It is definitely now using more fuel and the power is down.

Chris M.
 

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2001 S-Turbo Auto
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CM said:
Yes mileage will drop with stop start - but my town driving is a gentle commute within 30 mph zones and usually fairly free flowing. With traffic I can almost see the needle move on fuel gauge - and I have already checked for leaks. It is definitely now using more fuel and the power is down.

Chris M.
Hmmm.... fuel economy out of the window and power being down.... sounds like we are in the same boat! :eek:
 
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