exfuzzyt5
Tuesday 2nd March 2010, 13:14
Some advice guy's – been following the post on IPD HD Turbo Control Valve (TCV, BCS) as thought it might solve my problem !!!
Now the problem I'm faced with is exactly the same as I had 6 months ago when I had my V70 T5 P2 mapped – subsequently had it mapped back to std due to failure of the throttle body about a week after the remap. Its run fine for 6 months post throttle body replacement and it’s been pulling full boost, no pressure related problems. Its been on the rollers prior to remap and pulled 245 bhp – so its pretty dam close to what it should be.
The reason why it was flashed back to std map was my volvo main dealer wouldn't touch it as it was mapped - so had to do this so Volvo could sync the throttle body – also replaced the MAF with a OEM unit at the same time. So like I mention it’s been running fine for 6 months so thought it was about time to have it remapped again!!!!!!!!!!!!!
Now took it back last week to have it mapped and its doing exactly the same in relation to its boost pressure - it will boost 1 bar once and hold - then boot it again it will then dump its pressure and then it will only boost 4 psi max - run around for another couple of miles boosting 4psi max - after that it will then boost again 1 bar - and then drop to 4 psi - so it seems to go full circle
I’ve a pressure boost gauge so I can see pretty well whatits doing and where its dumping its boost - it boosting 1 bar which is not excessive pressure - I've got silicon vacuum hoses etc which are pretty new.
Last night I replaced the TCV with a spare one – this does exactly the same - can't rule out that one being knacked though - but again I used it 6 months ago when the problem first occurred post remap- so again that one was fine on the STD map and that was used on the rolling road last week when it pulled 245 bhp
So on the stand map both TCV's are fine and pull full boost - so if the TCV had failed then it wouldn't do that? Its only happens post remap and hence with the increased boost pressure
So do I go back to basics and replace all the hoses again £££££ or could an intercooler hose be collapsing under boost
Also its not logging any fault codes - so the plot thickens
The bottom line is its actually more happy on a std map and when it does work its no where near as fast as my old 850 T5 post remap
One area I noticed last night which might contribute is the MAP sensor on the inlet tube – that’s held on with cable ties as on of the clips is broken off – its pretty solid and the seal seems ok – is there a direct Bosch replacement or is it a Volvo main dealer part – not sure what the other sensor is - could this cause problems - also the wires/connection block is not that great? Anyone got a dead loom with a MAP connector block and 6 inches if wiring loom I could resplice in
Any thought would be greatly appreciated – as I’m p***ed off with it again!!!!
Now the problem I'm faced with is exactly the same as I had 6 months ago when I had my V70 T5 P2 mapped – subsequently had it mapped back to std due to failure of the throttle body about a week after the remap. Its run fine for 6 months post throttle body replacement and it’s been pulling full boost, no pressure related problems. Its been on the rollers prior to remap and pulled 245 bhp – so its pretty dam close to what it should be.
The reason why it was flashed back to std map was my volvo main dealer wouldn't touch it as it was mapped - so had to do this so Volvo could sync the throttle body – also replaced the MAF with a OEM unit at the same time. So like I mention it’s been running fine for 6 months so thought it was about time to have it remapped again!!!!!!!!!!!!!
Now took it back last week to have it mapped and its doing exactly the same in relation to its boost pressure - it will boost 1 bar once and hold - then boot it again it will then dump its pressure and then it will only boost 4 psi max - run around for another couple of miles boosting 4psi max - after that it will then boost again 1 bar - and then drop to 4 psi - so it seems to go full circle
I’ve a pressure boost gauge so I can see pretty well whatits doing and where its dumping its boost - it boosting 1 bar which is not excessive pressure - I've got silicon vacuum hoses etc which are pretty new.
Last night I replaced the TCV with a spare one – this does exactly the same - can't rule out that one being knacked though - but again I used it 6 months ago when the problem first occurred post remap- so again that one was fine on the STD map and that was used on the rolling road last week when it pulled 245 bhp
So on the stand map both TCV's are fine and pull full boost - so if the TCV had failed then it wouldn't do that? Its only happens post remap and hence with the increased boost pressure
So do I go back to basics and replace all the hoses again £££££ or could an intercooler hose be collapsing under boost
Also its not logging any fault codes - so the plot thickens
The bottom line is its actually more happy on a std map and when it does work its no where near as fast as my old 850 T5 post remap
One area I noticed last night which might contribute is the MAP sensor on the inlet tube – that’s held on with cable ties as on of the clips is broken off – its pretty solid and the seal seems ok – is there a direct Bosch replacement or is it a Volvo main dealer part – not sure what the other sensor is - could this cause problems - also the wires/connection block is not that great? Anyone got a dead loom with a MAP connector block and 6 inches if wiring loom I could resplice in
Any thought would be greatly appreciated – as I’m p***ed off with it again!!!!