dom123

I own a 2001 bug eye and a couple of weeks ago took it to get tuned, the bhp was 220 but was spluttering a bit and the fuel and air mixture was wrong so the maf sensor was changed. All seemed good until the car was back on the rolling road again and the bhp was around 170..... The garage which only works on scoobys has checked everything the cam belt is perfect the cat is not blocked checked the turbo checked for air leaks and so on, they say the car is is in pefect working order apart from being down in bhp.
The garage is recomended by Subaru them selves and have a good reputation.... They say this is the first time they have been stumped and just cannot seem to find the problem, has anyone ever had the same problem? any ideas?

TonyBurns

iTrader: (3)

What area do you live in?

Tony

dom123

Tewksebury near Cheltenham

serega

Do you have a boost gauge ? Is it boosting as it should ?
Is it smoking or using oil ?

dom123

All is 100% standard, does not burn or use oil, car is in perfect working order, you would not know it was down on bhp unless it was on the rolling road

Turbotits

iTrader: (2)

So from that we assume on the road the power feels normal? if so its likely the rr reading isnt correct or the ecu pulled timing etc on the rollers for some reason.

Maybe the intercooler wasnt being cooled enough? Some cars dont make the same boost on the rollers as they do on the road. This and a intercooler thats to hot will/could show a big power drop

sparkytrix

Powerstation is just down the road from you mate...

take it there, im sure they'll sort it

dom123

I dont know how it drives on the road the garage has had the car since the loss in bhp, they have had the car for three weeks now and have tried it on the r r countless times, it its powerstation it tewkesbury they say there is a definate prob in lack of bhp it is to much to loose, cheers for the help though!!

dom123

thats where it´s been livín, cheers

Mrchips

iTrader: (7)

ave they checked turbo housing for any cracks? Or even the actuator isnt stuck is it?

sparkytrix

well thats me out of suggestions

rookymatt

iTrader: (15)

Boost solenoid? They are quite poo on the bugs. My car was only making 230bhp on rollers, Changed to a 3 port and made 261!

deanos scooby

if u lost the bhp since u changed the maf try changeing the maf sens back to the 1 it was then start from there if still prob check the ecu hope it help

serega

The garage had your car for 3 weeks and you say the car drives normally while showing a loss of 50bhp on the rolling road ? They are taking you for a ride mate..

There are only 3 ways why a turbo car can be down on power -
1) turbo problems when the car is not boosting properly ( can be checked with a boost gauge )
2) electrical, ecu or sensor troubles, can be checked with an ecu code checker
3) mechanical/engine problems, can be checked for oil usage, check for smoke or check engine compression.

Any relatively good garage can find whether there is anything wrong with a car in a day, so whereever your car is now, take it home asap and take it to a proper place.

japjunkie

iTrader: (3)

i live near you and ill tell you now powerstation are a bunch of monkeys ,they have not got a clue. you are better off finding yourself a genuine subaru tuner like bob in swindon

dom123

thanx for everyones ideas, will let you all know what the prob is when we find it eventually.......

sparkytrix

Aside from OP, what makes powerstation a bunch of monkeys? Bearing in mind they worked with Litchfields for many years...

I know of many people that take their motors to them on a regular basis...me included...

IIRC Bob Rawle is much like JGM, a full time mapper?

Hope you get it fixed soon mate

dom123

cheers bud, it seems to be one of the probs which is a real bugger to find

scooby1929

iTrader: (1)

If it was me and it was driving fine then I would of just left it especially if you cant feel its down on power. Most likely the Rolling road was up the left

Midlife......

iTrader: (2)

The Bugeye has plenty in reserve when it left the factory .......if you have any spare money I'd PM Dynamix and have a simple open source re-map (Dynamix can advise on any panel filter change etc). He can re-map car and look at boost/fuelling /MAF/ Lambda / and things like the IAM

Shaun

Mifo

iTrader: (10)

If it was running 50 hp less than before Im sure it would be noticable when driving?
I mean thats over 20% of the power gone - it would seem alot slower surely?

Midlife......

iTrader: (2)

Poor batch of fuel can drop the IAM and lose power......that's why I suggested a re-map if mechanically everything seems fine as could be a faulty sensor or other related problem (like fuel / timing) that can be picked up during mapping

Not sure if you would notice the power loss due to the very early spool of the TD04 turbo masking power needed in 4th gear at WOT under load...

Shaun

Shaun

dynamix

iTrader: (3)

Can also be other things that can cause the advance multiplier to drop and put it into limp mode. Sorry haven't seen if dyno graphs have been posted - what boost was it on the dyno run ?

Midlife......

iTrader: (2)

Hmm..

Like dynamix mentioned it would be nice to see the RR Printouts

Shaun

Fuzz

AM is 16
Boost is a normal 0.9 bar
Has been on the rollers numerous times, same result.
Original MAF makes it run lean and det badly.
23-25 degs ign at high rpm and not a great deal of knock correction.
no CEL
no codes
cam timing checked
cats don't appear to be melted/blocked.
No air leaks.

Dave Y

iTrader: (52)

I think there is a company in gloucester called Ajec racing in their advert they say they work on subarus,might be worth a call

dom123

At last the mystery is solved, took the car out of the original garage after 5 weeks, and took it to another for a fresh pair of eyes... it turned out to be the pre turbo cat, it was melted and now has been changed and the bhp is spot and now in perfect working order big thanks to AJEC RACING

sonic93

iTrader: (16)

thats good mate bet it running quite a bit better now?dont look good for power station now tho does it

Midlife......

iTrader: (2)

That's unusual.....the TD04 shouldn't normally produce EGT's high enough to melt the pre-cat. In any case high EGT's should have thrown a CEL via the EGT sensor in the up-pipe.

Disintegrating cats in front of the turbo are bad news for the Turbo

Did they just stick in a de-cat up-pipe ?

Shaun

dom123

ummh... I have learnt from my mistake !!!!