MY 02 WRX
i am getting high boost levels 17.9/ 18.3 psi etc, then obviously start to get fuel cut, turbo is td04fe, running no cats what so ever, sti7 IC, silicone hoses, these mods have been on for 2 years,and i have had no problems at all,
the high boost started last night but the other weak i did here small rattle in the exhaust, i have checked the hoses from turbo compressor to EBV and back to waste gate actuator, no splits etc, i cant here any leaks of boost, there are no CEL displayed, the waste gate actuator rod has the usally amount of restriction, the question i have is, isi it possibly the waste gate penny in the mouth of the turbo to exhaust at fault, is it a common item to fail.

 

come on guys give me some help

 

You could try connecting the compressor bleed nipple directly to the actuator, thereby eliminating the existing pipework and boost control solenoid.

Car should only run 7-8psi with direct actuator pressure. If so then you need to try a different solenoid (assuming the pipework is OK).

If it still overboosts then try a different acuator.

Andrew...

 

Check your boost solenoid pipework first. If it's full of oil and crud, there's your answer. It doesn't allow a clear boost signal through to the actuator and then you hit overboost/fuel cut. Once cleaned out with carb cleaner, 9 times out of 10 that fixes the problem.

 

andy c yes your right it was SSO, will try both suggestions, just to add the more i drive the car, the tone of the exhaust just doesnt seem right or normal, i am begining to wonder if i have an exhaust gas leakage prior to the turbo, it just seams a little bit raspy, i know i had a hell of a job sealing the manifolds and upipe several month ago when fitting a new up-pipe due to the first one cracking (graham goode one piece ) certainly recommend the two piece slip joint type from other retailers instead of one piece, would a leakage prior to the turbo cause this fault?? many thanks

 

checked the pipe work yep full of crap blocked up full of black carbon, cleaned it all now seams fine but guess i will have to reaeal the upipe or replace it for a 2 piece one which doesnt crack all the time

 

guess what its back, i have noticed the fault isnt there immediately, it seems to develop itself after about 20 miles of hard driving, basically you can warm the car up take it for a damn good thrashing and all will be fine for the first 20 miles or so, then it will misbehave itself, the fault usually shows in 4th/5th gear foot hard down, will recheck the boost solenoid pipework again, and try to get some more brake cleaner into the solenoid itself, just wondering about MAF, what symptons do the seam to have on a newage car when they are failing,

 

more help needed please, the fault is better described as loss of boost then huge amounts of overboost to 18 psi

 

well this forum is not very helpfull, i post problem and not many people seem to help

 

Brunny

As you are in teeside I'd suggest some professional help from a specialist

Try Alyn at www.asperformance.com ..well regarded by many including the TTS Scooby crew

Shaun

 

midlife thanks for that advice i may just have to do that, its annoying as i as i am in the trade but are quite new to the scoobies so not that clued up on them but know a reasonable amount, i have spoken to alyn a few times before about 2 years ago about some other matters which are resolved now, he basically could not help me at all it was only a simple matter too about o2 sensor values, he indicated i had more specialist diagnostic equipment than himself, he said he mainly did motorsport engines and didnt get involved with road cars that much, well i guess i will give him another try

 

Brunny

I apologise if my post was patronising as I didn't know you were in the trade or had dealings with Alyn in the past......sorry

Like you I have a Bugeye MY02 WRX and over the 4 years or so I have had it I have tried to fathom the workings of the damn thing !!

I had a Toyota MR2 for 16 years before the scooby and apart from putting petrol in the thing and changing the tyres it never failed me ..LOL

Alyn has worked on my car in the past and I value his no nonsense approach hence my recommendation.

As an aside, for the time I have had my Bugeye (from new) I have noticed a change in how the "motorsport" side has merged into the "road" side of things. Roger Clark Motorsport / Teg Sport etc.

I seem to recall that Harvey has used a Scooby place off the A69 near Hexham for some of his work, I might be completely wrong but maybe a PM to Harvey would help

Shaun

 

midlife you werent patronising me at all dont worry about it, i since buying the 02 bugeye 2 years ago have done nothing but complain about drivability issues, i have had several other turbo charged cars including a fiat coupe 20 valve turbo, the fiat was by far the quickest of the cars but unfortunately they dont go round the bendy things we call corners, i love the scooby but i think they are too qwerky, always going wrong, the fiat like you with the toyota all i did was put fuel in, saying that i had just rebuilt the car for the previous owner, i had replaced the engine, turbo (upgraded it) flywheel, clutch exhaust manifold, injectors etc etc so there was nothing really left to go wrong

 

Brunny

I must admit owning my MY02 bugeye has been a bit of an eye opener in terms of what goes on under the bonnet of a Subaru......especially our MY02 WRX "random CEL generator" !!

To temper that I have met a lot of real nice people on SN, even to the point of having one as my Baby Dominic's Godfather !!

Reliability of new cars was not something I used to worry about......Our Escort (last of the breed) ferried the kids and wife about for years...I used to put washer fluid in every now and again to keep the windscreen clear but as I had the MR2 it was "the wife's car".

When we came to trade it in for the Picasso the salesman looked towards me for info about servicing etc. (as I was a man) but I pointed him to the service book as it wasn't my car and it was .......................


Blank since we bought it !! LOL years of dealer free motoring !!


Err..was your Fiat Turbo yellow ??

Back to Your scooby, My car hasn't suffered the particular problem you have so I'm not sure what the problem is I've got my OEM 2 port bost solenoid in a small box somewhere in the garage. If you PM me your address I'll pop it in the post

Cheers

Shaun

PS I'm sure the garage Harvey mentioned was Pye Motorsport

 

what boost solenoid are you running now, a 3 port, or boost controller, dawes device, with a remap etc, the fiat coop was a scotts green one, believe me it was quick, even on a 1/4 mile she was running a 13.851, where as my scoob is still only running a 14.002 ( have done few more mods since that time and never rerun it), the fiat did well over 160 mph went off the clock at 160, where as the scoob only hits 156,

do you mean john pye over near bishop aukland or durham area, i know of them

 

Brunny,

Midlife's setup is the same as mine.

Original 2 port was 'dumped' in favour of a 3 port at the first Tek3 remap. This was subsequently replaced by the AVCR.

Martin (The Godfather)

 

now martin how you doing, these scoobs man always faulting lol, you might have an insight, will be going for hell for leather in 4th 5th gear, the boost level drops off then kicks back in at 17/18 psi, its not all the time but after about 20 30 miles of good fun, after its faulted i can reduce my speed down to say 50 leave it in 4th, put foot hard down and boost shoots upto 18 psi, in general when the car is running right it is driving really well nice and smooth, steady boost etc, i recently checked my fueling with LM1 motorsports wideband afr, was running absolutely fine, checked before fault developed so i am confident fuel pump is ok, any ideas martin, suppose i can rig fuel pressure gauge up and check delivery pressure when fault apparant, will eliminate tired worn fuel pump

 

Brunny

By "Godfather" I think Martin means he is baby Dom's real Godfather rather than Don Corleone !!

Like Martin I run an AVCR along with the Apexi boost controller The upside is that the boost happens no matter what the ECU thinks, the downside is that if the ECU thinks there is a problem and decides to cut boost it can't !!

Are you are running the Original ECU Map without any changes ?? I'd have thought the bugeye MY02 OEM Denso map would have struggled to cope with the de-cat and the very efficient STi top mount.

Bob Rawle at BRD has EcuTeK mapped both Ninnybobs and my Bugeye......it may be more a mapping problem as the sensors and ECU have finally failed to compensate??

PM or e-mail Bob, I'm sure he might offer some suggestions

Shaun

 

still on original ecu map, been absolutely fine for 2 years, full decat including up pipe, egt sensor removed and bypassed with resistor, rear o2 has cell fix in it, k+n pannel filter, sti 7 tmic, silicone ic hose and dump valve hose, originall fuel pump, i am constantly checking fuelling with LM1 wideband afr, always spot on at 10:1 or 11:1 ratio right upto to max speeds

 

Hi Brunny

Should't be too much there to fool the OEM ECU as it won't "recognise" many changes but the potential to re-map the ECU and release some STi killing performance seems to hard to resist


Personally I'd contact AndyF (pretty local) for a re-map and to check out what the OEM sensors are telling the ECU. It might be something like a faulty intake sensor telling the ECU to drop boost if it thinks the temps are too high !!

Shaun