turbo or fuel pump?

[barnsleyman]

ok guys got a megga problem,golf gt tdi 110 99 v reg,only had it a couple of weeks,under hard acceleration or crusing at moterway speeds it "goes" in to limp home mode,do have trouble starting on mornings aswell,took it to local vw specialist to check the computer it said the fuel pump,but the guy at the garage says hes not convinced and thinks its the turbo? hmmmmmm.my personal opinion before i took it was that it was getting starved of fuel,you can feel it "holding back" before it goes into "safe" mode,any thoughts would be appreciated,car has only 102 thou on clock and im surprised to be havin major issues like this

[Ben]

if the diagnostics say its fuel pump why would it be the turbo

i'd get a 2nd opinion

[Crasher]

Do you have the fault code number?

[barnsleyman]

Do you have the fault code number?

no sorry he says hes deleted them all,says hes gonna check the "arm" on the turbo says they stick sometimes,if that doesent work says ill need a turbo! mmm 4-6 hundred pounds he says and 2 hundred for fitting

[Crasher]

He could be right but I would want to see fault code 17965 first.

[ini]

Did they check the timing?

If it is very retarded this could help to cause hard starting and limp mode(quantity adjuster cant compensate for very retarded static pump timing) ?

If the pump works fine in lower gears, it is possibly not at fault? maybe maf or mechanical boost problem?

It does sound like a sticky vnt mechanism. Clean the turbo, either on the car with a long run of at least 2hrs on motorway with ballast etc, chemically by squirting carbon remover in the hotside and jiggling the actuator for a while, or remove and clean internally.

It will be apparent when it is checked by hand.

I very much doubt that you need a new turbo. I am slightly synical from the amount of times dealers and mechanics want to replace the most expensive parts on the engine for no reason (although it is just dealer policy to replace a dirty turbo with a new unit)

Could also be MAF, N75, control leak, all the usual suspects.

As Crasher suggests the fault codes would be very usefull, the DTC's are most likely to reoccur.

[barnsleyman]

Did they check the timing?

If it is very retarded this could help to cause hard starting and limp mode(quantity adjuster cant compensate for very retarded static pump timing) ?

If the pump works fine in lower gears, it is possibly not at fault? maybe maf or mechanical boost problem?

It does sound like a sticky vnt mechanism. Clean the turbo, either on the car with a long run of at least 2hrs on motorway with ballast etc, chemically by squirting carbon remover in the hotside and jiggling the actuator for a while, or remove and clean internally.

It will be apparent when it is checked by hand.

I very much doubt that you need a new turbo. I am slightly synical from the amount of times dealers and mechanics want to replace the most expensive parts on the engine for no reason (although it is just dealer policy to replace a dirty turbo with a new unit)

Could also be MAF, N75, control leak, all the usual suspects.

As Crasher suggests the fault codes would be very usefull, the DTC's are most likely to reoccur.

ok thanks to everyone for there help ill let you no how i go on,one last thing i bought the car from a garage,picked it up on 26 feb,no warrenty but it doesent say sold as seen on receipt,do you thing theres anything i could do legally?

[ini]

I believe that a UK trader is legally obliged to give you at least some kind of guarantee, even if it is "bring it back if you have trouble on the way home".

Even if the problem is fuel pump related (as fuel pressure is partly speed dependent), commencement of injection & quantity adjuster problems are generally repairable.

[Crasher]

By law you have 3 months warranty.

[barnsleyman]

By law you have 3 months warranty.

nice just what i wanted to hear! anyway picked the car up from the vw specalist says he,s freed the "arm" best he can,says give it a good blow out on moterway try to perserve he says till monday, he says you dont no how long the cars been stood,<if that fails he says i need a new turbo>, could take awhile to free it properly he says?anyway takes it for a blast first 5 mins ok then it starts again "holding back",so i pulls onto next slip road,thought ill just pull in on hard shoulder of slip road turn her off them back on,flippin battery dead as a dodo 2 bloody hours waitin for rac,bugger this im takin it straight back to where i got it from tomorrow,he should be afraid very afraid,of the wife lol even im scared of her,anyway ive got 2 pages of fault codes lol,all i gotta do now is work out how to scan em and put them back on here<im worse with pcs than cars>anyway lads and lasses thanks for all your info i will keep you updated and ill try to get the fault codes on,looks like a load of gobledi goog to me laters.....................paul