imprezapeej

Hi all, A quick question about my Turbo....I have recently replaced my 2000 MY WRX TD04 Turbo and since it has been in i have had a couple of issues that i would like help with. The car pulls hard as it should but from what i can remember, but from about 3rd gear onwards when i boot it the turbo seems to "ride" somewhat similar to a clutch being "ridden"...?? Again, it still pulls but almost "Coasts" for a while if that makes sense...?? Can any one shed any light on the issue perhaps. I have tried cleaning the MAF and the Boost Solenoid with Brake and Carb cleaner and this seems to have had no significant effect (although when i sprayed into the 2 holes on the BS the carb cleaner shooting striaght back out of where it entred !!) I have read that you are supposed to clean the Boost Solenoid when the ignition is on or something like that and with 2 green plugs under the dash as well....? Can anyone offer any advice please.ffect but li VMT. Pete

bluenose172

iTrader: (2)

Do you have a boost guage? Is it reaching the same boost as before? What year was the replacement TD04 from?

imprezapeej

Thanks for your reply bluenose172....Good question about the boost guage. It boosts well and has a pillar guage which reaches about 1 bar...the Turbo was from a 2003 WRX and i have been assured by a mate that removed it that it is 100% sound (which i trust) in terms of what it was like before...I have no idea to be fair, as i inherited the car "dead" as the previous young man ruined the heads....! Anyway, much love later...and a few quid of course and i have her back on the road. I did think of one potential issue though, For some reason the previous Turbo was a TD05 which had been doctored to (Front/Side Entry) and put on. I replaced this for the TD04 as was the standard for an import WRX i believe..? i did think that perhaps the car had been mapped for a TD05 and therefore was struggling to boost with the NOW in place TD04...?? your thoughts welcome. Like i said earlier, when I did try to flush the solenoid through it was completely removed from the car and the spray in....came straight back out of the same hole....!! so im perhaps thinking that i should have the ignition on or something...?? as i have read this in other posts.

MrNoisy

iTrader: (28)

If you've changed the turbo that was on the car and not subsequently had it mapped it will need to be mapped to cope with the new turbo mate.
There are some things you can change on these cars (fuel pump for example) without needing a remap, but the turbo ain't one of em unless you're doing a like for like.

You'd have been better off keeping the 16g that it sounds like was on the car tbh you'd have gotten better power out of it.
Cars with a 16g have been known to make around 350-360bhp, where a TD04 will max out at 280.

With this in mind, my suggestion would be to:
a) Put the original turbo back on the car, and
b) Check when your spark plugs were last changed - you get hesitation under acceleration when they start to go. Also check your coil packs aren't loose or crumbling to bits.
Personally, if you bought the car "dead" but haven't already, I'd ensure you change the spark plugs, fuel filter, oil filter and gearbox and engine oil (and possibly coolant too) unless you know each of these has been changed recently. I did the lot on mine when I bought it as this way you know where you're starting from, and if you do it yourself, it's not all that dear, just time consuming.
c) Failing that, just take it to a specialist (and/or mapper) to have the car properly checked over. Sounds like that wouldn't be a bad idea anyway given the car's history.
Any decent mapper will do you a health check for not a lot, and if you take it to a dyno they'll probably do a power and diagnostic run to check your fuelling etc for you for about £50-60.

HTH

MrNoisy

iTrader: (28)

If you've changed the turbo that was on the car and not subsequently had it mapped it will need to be mapped to cope with the new turbo mate.
There are some things you can change on these cars (fuel pump for example) without needing a remap, but the turbo ain't one of em unless you're doing a like for like.

You'd have been better off keeping the 16g that it sounds like was on the car tbh you'd have gotten better power out of it.
No offence intended here Pete, but my suggestion would be to take this to a specialist (and/or mapper) to have the car properly checked over as it sounds like it needs a once over.

imprezapeej

Thanks for the advice Bugeye..! I think your absolutely right in what your saying. Not to sound as if i know what the hell im on about anyway, after i had cleaned the above mentioend and it was still the same i too thought that perhaps it was exactly what you have said. If a TD05 came off and a TD04 went on, then naturally the balance would be slightly off....! Incedently, i have been offered a VF22 that i could replace the TD04 with which might be "Just the ticket" in terms of performance. What do you think...? Once again, Thanks for coming to the same conclusion that i did slightly suspect myself.

MrNoisy

iTrader: (28)

Wouldn't touch a 22 mate. Far too laggy and old tech.
It would be a step backwards. Just put the 16g back on and then check the above. It's a far better turbo as long as it ain't knackered. Failing that, another 16g, vf30, 34, or 35 should all get you into the 300's comfortably.
For 360, TD05 18g, and for 380-400, 20g.

I'd stick with the 16g myself until I knew what the problem was. And if you haven't had the car mapped for the new turbo don't go hammering it. If its running lean you could end up melting a piston and be back to square one!