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John_C

posted on 9th Nov 03 at 12:08

a car gettin pissed :boggle:

alright stu, can't help u but thought i'd say hello :wave:


J da Silva

posted on 9th Nov 03 at 10:39

and your sure there's no lagging?


vibrio

posted on 9th Nov 03 at 10:21

it might not show up on the dash


StuartVRS

posted on 9th Nov 03 at 10:13

Vibrio, it just feels slower to be honest, doesnt seem to feel rough. An MAF fault should show up in the ECU fault codes wont it, might call the AA out and get them to plug their computer in to check.


vibrio

posted on 9th Nov 03 at 09:46

I suspect a doggy MAF. when you accelerate in high gear does it feel funny. not smooth. I very much doubt it's the actuator.


StuartVRS

posted on 9th Nov 03 at 01:24

using bailey dump valve, should be boosting to 15/16 psi and its not getting anywhere near, its hitting a peak of 9, sometimes 10. My first thought was the actuator, but i really dont know :( I thought a dodgy actuator would just make the boost tail off as drew said, not stop it from hitting its peak boost


Drew

posted on 9th Nov 03 at 01:05

quote:
Originally posted by DAYZEE
Actuator spring may be getting weak, opening the wastegate too early.
Thats what I'd go for first.


dont know much about turbos even thou i got one - but this was my thought - heard about people who boost to ??psi then drops off, and its been cause of wot Dayzee says


A1EX

posted on 9th Nov 03 at 01:01

just out of interest what dv are you using?


StuartVRS

posted on 9th Nov 03 at 00:07

ok mate, is it easy to test or will it be a case of change it and find out if that was the problem? Also, are they expensive?


DAYZEE

posted on 8th Nov 03 at 23:49

Actuator spring may be getting weak, opening the wastegate too early.
Thats what I'd go for first.


StuartVRS

Icon depicting mood of post posted on 8th Nov 03 at 23:05

Hi Guys, need some help and advice.

After we had our A3 1.8 turbo chipped, we had it rolling roaded at a little over 200 bhp. After a while, we changed Dv's and had it rolling roaded again after the service, again, at a little over 200 bhp. Anyway, 2 months later we had it on a rolling road as it felt a bit sluggish and as we were off to santa pod, thought it best to check it out first. It came out at 187 bhp and the bloke put it down to the high temperatures. It was boosting to 15psi and dropping to 11 psi. Well, now, we have noticed even less power and on our boost guage we are peaking at 9 psi and dropping away. Could you guys give me any reasons as to why it would do this?

I know it isnt the DV, cant see or hear any boost leaks. Only thing i can think of is actuator, MAF sensor, or the turbo is giving up. What do you guys think?