[dazek]

I was driving on the motorway today and if i put the accelerator to the floor the turbo would start (just over 3000 revs)but then seem to die off for a split second before spooling up properly again - even the misses noticed it sat next to me as the power seem to drop back as well - it felt like being in an automatic when it changes gear. my misses thought i was dipping the clutch but my foot wasnt even touching it

also noticeable in other gears but most noticeable in 4th and 5th - is it having difficulty spooling up or could it be something else. if i was less aggressive with the accelerator the problem wasnt notceable

help please

 

[paulpicks21]

Have you checked your spark plugs?
Could be misfiring .
What makes you think it is the turbo?

 

[dazek]

because it was happening when the turbo kicked in and there was a momentary lapse in power - but i am clueless on such things!! i suppose it could be anything really - i hav not had spark plugs changed since ive had the vehicle which is coming up to year.....

 

[Frosty]

Do you have a boost gauge in the car? Any ideas on if the boost level actually dropped?

Could also be the dreaded fuel-cut symptom which would occur as a result of the wastegate actuator not doing its job.

 

[xlr8]

may be a small air leak somewhere....

check all your major boost hoses...make sure they are still on properly and the clips are tight e.g. on I/c & turbo
- also check all the smaller vacuum hoses etc

also, as Frosty has said...could also be a 'fuel-cut'
but that is fairly harsh effect i.e. as if hitting a brick wall & no power for a split second
- worth checking the actuator

 

[dazek]

cheers folks - the effect is far from harsh - almost just like a delay which wasnt there before - will check all hoses & clips etc. unfortunately do not have a boost gauge - been testing it today - it is virtually negligble in 1st to 3rd - but in 4th and 5th theres a definite delay before the car takes off

 

[DuncanIV]

Do the revs rise ,but the car stays at the same speed??

put it in 4th at 30 then floor it.if the revs rise and you stay at the same speed the clutch is slipping.

 

[dazek]

cheers - will try that out

 

[Evo Stuart]

have you had a look at the lambda or MAF ?

What filter you running ?

 

[Richard G]

clutch slip.........

 

[dazek]

lamda MAF????
filter is a piper cross filter - been on for a while

if it was clutch slip would it always happen at same revs when turbo is just kicking in???? is it more likely to occur when you floor it as opposed to a more gradual acceleration (still on boost though)


is the cure a new clutch!!

 

[Evo Stuart]

Could be the clutch as Rich says but the lambda sesnor can give you the described symptoms if its faulty & the MAF if it becomes clogged with oil or in your case, foam, this can give you fueling probs. The MAF measures fuel/air and is situated on the filter pipe.


how long is a while ?

 

[Evo Stuart]

check the foam on the filter isn't breaking up on the inside. Personally I wouldn't be running a foam based filter with a MAF in place.

 

[dazek]

approx 4 months. i know they were fiddling with the lamda sensor as the car would not pass MOT on emissions - i will get what you've mentioned checked out - cheers stuart (& rich!)

 

[Richard G]

the reason i said clutch slip is cos it will tend to do it more in 4th and 5th as there is more load on it.

one way to tell - drive the car in 4th or 5th get on throttle a little and press on the clutch pedal a little. if you get definate slip, ie the revs rise suddenly, then clutch is biting very high and is on its last legs.

 

[DuncanIV]

Did you try it?

 

[dazek]

yes duncan - it seems the revs do rise - feels very like someone has banged on the clutch for a second - seems to be getting more noticeable for passengers too

tried rich's suggestion of tapping clutch when driving in 4th and it doe seem as though the bite is very high

 

[Richard G]

i'd plump for clutch then mate. have a sniff under the bonnet too, see if you can smell the clutch

 

[martincarew]

check the foam on the filter isn't breaking up on the inside. Personally I wouldn't be running a foam based filter with a MAF in place.

Down to personal preference that one!! A foam filter acts to protect the turbo blades (assuming its not falling apart) unlike the Japanese ones which allow our very dusty mucky air to drag dust etc in and damage it instead!! The air in japan is very different to the UK and as such requires a better filter.

Had simailar probwith revs rising but no speed increase and yurned out to be the clutch and flywheel needing to be done. Not a cheap job but then thats not why I bought it!!

 

[Weebl]

Down to personal preference that one!! A foam filter acts to protect the turbo blades (assuming its not falling apart) unlike the Japanese ones which allow our very dusty mucky air to drag dust etc in and damage it instead!! The air in japan is very different to the UK and as such requires a better filter.

??

The foam filter remark was aimed at oilable foam filters. Generally a bad idea with a MAF as the oil gums it up. Any filter helps protect the turbo blades, thats what they do?

I take it you were jesting when saying the air in Japan is different to UK air?