Ok so here the issue.... for the last year or so ive had a random stutter at start up from cold.... its seems to do it for a few weeks then go away for several!
1, it only does it form cold ( e.g left over night)
2, to those who remember the manual choke (!) it feels like its either not getting enough or getting too much fuel. Starts runs for second or two then stutters almost to stall then picks up runs stutters again... sometimes stalls.
3, It also only happens during that inital 30 seconds or so when the engine runs much faster than normal. ( is thre turbo running hat this point as it seems to sound like it and then a big release as it settles back down to lower revs - 1200...approx ( once warmed it settles to about 720rpm.
4, Once this stage is gone it runs absolutely fine.
5, If you give it a bit of extra revs when its first started you can normall 'hold off' the stutter. Drive off and it will pull and cut and jump for a bit.
6, fuel filter, air filter plugs etc all been changed and no change!
7, coolant sensor is new
8, ignition coils are new
9, no codes coming up on vag when it does it .... but every so often i get the 17511 17535 codes. not alot maybe once in while
10, Normal driving is totally ok. Not hesitation etc smooth as my bum!
11, Had the pre cat o2 sensor changed as well
So reading all the posts about mafs etc..... could this be a fault maf even though no code? The car has done 108K but had a new one at 42k
could this be a boost leak..... but surely this would show on VAG when i test it after it has happened? I have had a look as be i can around the pipes and a good 'feel' but nothing seems to show... then again as it only happens during that short period its hard to check them all in that time and if there isa leak i cant feel it!
I'm happy to change the maf if there is a good chance its that as to be honest its done 70K and by what i see they dont last that long in alot of cases, but no point in spending money for the sake of it!
Oh yeah if i disconnect the maf while running it doesnt really make much difference, slight change at point of reconnection, but thats it. Is that normal?!
1, it only does it form cold ( e.g left over night)
2, to those who remember the manual choke (!) it feels like its either not getting enough or getting too much fuel. Starts runs for second or two then stutters almost to stall then picks up runs stutters again... sometimes stalls.
3, It also only happens during that inital 30 seconds or so when the engine runs much faster than normal. ( is thre turbo running hat this point as it seems to sound like it and then a big release as it settles back down to lower revs - 1200...approx ( once warmed it settles to about 720rpm.
4, Once this stage is gone it runs absolutely fine.
5, If you give it a bit of extra revs when its first started you can normall 'hold off' the stutter. Drive off and it will pull and cut and jump for a bit.
6, fuel filter, air filter plugs etc all been changed and no change!
7, coolant sensor is new
8, ignition coils are new
9, no codes coming up on vag when it does it .... but every so often i get the 17511 17535 codes. not alot maybe once in while
10, Normal driving is totally ok. Not hesitation etc smooth as my bum!
11, Had the pre cat o2 sensor changed as well
So reading all the posts about mafs etc..... could this be a fault maf even though no code? The car has done 108K but had a new one at 42k
could this be a boost leak..... but surely this would show on VAG when i test it after it has happened? I have had a look as be i can around the pipes and a good 'feel' but nothing seems to show... then again as it only happens during that short period its hard to check them all in that time and if there isa leak i cant feel it!
I'm happy to change the maf if there is a good chance its that as to be honest its done 70K and by what i see they dont last that long in alot of cases, but no point in spending money for the sake of it!
Oh yeah if i disconnect the maf while running it doesnt really make much difference, slight change at point of reconnection, but thats it. Is that normal?!
