Smoke under hard acceleration
Discussion
I recently bought myself a shed, a £1500 '57 Vectra SRI 1.8vvt with 85k on the clock
Occasionally when accelerating hard, there is a blue smoke screen from the exhaust, which only appears to manifest itself between 3-5k rpm. It doesn't do it every time I use full throttle.
There are no lights on the dash, but a pedal test shows a stored code of P0170, which appears to relate to th MAF being goosed so wouldn't cause this
The previous owner saw fit to gererously overfill the oil during its last service (it's self serviced for the last 5 years) could excess oil be getting sucked up through a PCV system and entering the combustion chambers?
If it were piston rings/stem seals wouldn't it smoke all the time, rather than occasionally within a certain rev range?
It drives fine other than this, seems to be making full power and long term average mpg is 40.
Any ideas?
Occasionally when accelerating hard, there is a blue smoke screen from the exhaust, which only appears to manifest itself between 3-5k rpm. It doesn't do it every time I use full throttle.
There are no lights on the dash, but a pedal test shows a stored code of P0170, which appears to relate to th MAF being goosed so wouldn't cause this
The previous owner saw fit to gererously overfill the oil during its last service (it's self serviced for the last 5 years) could excess oil be getting sucked up through a PCV system and entering the combustion chambers?
If it were piston rings/stem seals wouldn't it smoke all the time, rather than occasionally within a certain rev range?
It drives fine other than this, seems to be making full power and long term average mpg is 40.
Any ideas?
Why would it only do it occasionally if it was the rings?
I've been quoted 600 quid to supply and fit a similar mileage engine, inc a timing belt change so if it's likely terminal I'll just do that rather than mess about with it (similar condition cars seem to go for about 2k so happy to do this)
I've been quoted 600 quid to supply and fit a similar mileage engine, inc a timing belt change so if it's likely terminal I'll just do that rather than mess about with it (similar condition cars seem to go for about 2k so happy to do this)
I've drained to oil to mid-dipstick.
I removed the dipstick with the engine running, there is a lot of suction down the tubes and it increased the revs. I tried to remove the oil filler cap but there is too much suction to do so. Could this point to a PCV issue? I seem to recall a colleague having similar issues on a similar age Astra
I removed the dipstick with the engine running, there is a lot of suction down the tubes and it increased the revs. I tried to remove the oil filler cap but there is too much suction to do so. Could this point to a PCV issue? I seem to recall a colleague having similar issues on a similar age Astra
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