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Model specific boards => Golf mk4 => Topic started by: andy_airsoft on 26 August 2009, 08:43

Title: Boost Problem with a twist
Post by: andy_airsoft on 26 August 2009, 08:43

Hiya guys and gals

Me again with a question to ask.

I thought I had a boost leak but after checking all the pipes they all seam ok.

When I put my foot down to full it peaks at 16 - 18psi and then drops to 5 straight after its peaked but today I drove with half throttle and it keep its boost all the way up to 15psi and that got me thinking, could my dbw throttle need re-aligning?

Tis a bit of a weird one as to get the best performance out of my car Ive gotta drive it half cocked.

By the way its a 2001 AUM with 74k on the clock and just had a major service.

Cheers for any help.

Andy


P.S Ive not got VAGCOM yet but ive been advised to but it from Chinavasion as they are pretty cheap for the cable and software but if anyone tells me different then I'll buy it from where ever as its payday today woo hoo (more goodies for the dub)

Title: Re: Boost Problem with a twist
Post by: topher on 26 August 2009, 12:00

hmm.. N75 maybe. You can readapt the TB by opening your bonnet, opening the drivers door and turning the ignition on. You'll hear it clicking and then buzzing.. give it about 30 seconds and it'll be all done :afro:

Title: Re: Boost Problem with a twist
Post by: andy_airsoft on 26 August 2009, 13:03

yeah that does it everytime I open my drivers door, I had thoughts about the N75 needing replacing as I had recently an error code that the garage checked and that was 17963 charge pressure: maximum limit exceeded p1555 which from what I have read is the N75 needing replacing, but which one to replace with a remaped car, where from (VW Garage down near where I work) and how much and I looking at to replace.

I did a whole load of searching on this a while back but no one seems to give a definate answer.

Some people say just get a standard one, some say go for a J or H valve but not sure which one to ask for.

Would a MAF do this to the engine too as I had error code 16486 Mass air flow sensor: signal too low P0102?

Cheers Toph for any help  :wink:

Title: Re: Boost Problem with a twist
Post by: topher on 26 August 2009, 17:54

yeah the maf would certainly do that, if you're still getting the signal too low fault (same as i'm getting at the moment) then it needs replacing... i'd stick with the standard N75, the uprated ones are a bit jerky for my liking