Still got boost problems.......Please help

[andy_airsoft]

Hiya guys

After replacing 2 coil packs, MAF, N75F and checking all pipework including pancake pipe I'm still not boosting right.

It used to boost all the way up to 15 - 17psi then drop after it peaked to 5psi.

After changing the coil packs and N75F it now holds at 9 - 10psi consistantly which is nice but the car has been remaped (so I was told) and from what I have read a remaped car should boost at about 15 - 17psi.

Now Ive spent about £1200 on the car recently (major service + belts + waterpump + other bits inc 007p) so money is getting a little on the tight side as the car was only worth about £1700 so if anyone can help please do

Cheers

Andy

[Miggie]

Hello mate i have the same issue and turned out to be a cracked turbo. Seen it when upgrading cat.

Sorry for the bad news 

[dai-cymru]

check the turbo is bolted to the manifold tightly a golf turbo came into my mates garage after having spent £000's at another garage and my mate noticed the turbo hanging off bolted up and no further probs

[andy_airsoft]

The turbo is new so shouldnt be nackered but will check to see if its on ok, the garage that did all the work for me did give it a once over and said it all looked ok.

The weird thing is before I replaced the N75 and coil packs on 3 days out of one month the car would boost at 15 - 17psi all day long which was perfect.

Think i'll have to jack the car up and have a look at the turbo to make sure its all tight and if it is then a RR should tell me whats wrong.

Tis a shame I'm having to put so much damn money in to it 

[T_J_G]

Have you used genuine parts?

[andy_airsoft]

yeah all from VW down the road from me.

It is nice to hold boost as it's never done that before but I do miss 17psi

[jake]

could be as simple as a boost leak!

any engine codes?

[andy_airsoft]

checked all pipes that I know of for leaks but all seem to be ok unless Ive missed one.

Not got VAGCOM but did have a few when it was last checked at the garage but should of helped a few of those with the parts I replaced.

Really do need to get VAGCOM or find someone close to sunny Southampton.

Keep putting money into a car I know wont sell for much which is a shame.

Gunna get a Mk1 clipper in the next year or so for a little project so really want to get this one working as my day to day car and have the softtop for the weekends.

When my Mk4 is boosting back at 15 - 17psi i'll be a happy man again but cant afford putting another £500 into getting her working as that will mean I got her for £1600 and would of spent £1700 on her when I could of good a better condition one in the colour I wanted instead of one with bad bodywork in the colour I settled with.


Not a happy man today sorry 

[jake]

why dont you take it to a VW specialist and get a verdict off them , such as revo, or awesome or whatever!!

Jake

[andy_airsoft]

As money is tight after spending £1200 on it over the last 2 months so gunna have to keep searching until next payday and even then it depends on how much they will charge for seeing whats wrong with her.

One thing that came out on another forum was adjusting the N75 valve but can see how to and if that would solve the proble,???