The car is off the road for winter, so I'm doing some stuff I've always ment to do, but never found the time.

 

Well time and no were to work, but after building a nice garage this year I now have room to work and play in the dry.

 

I had the battery out to get room to work on something else, but whilst there I noticed the passenger side turbo hose top clip was very loose, took 10 turns to tighten!

 

The car has always boosted and seemed ok, hence why I've never bothered to check for leaks, but now is the time after seeing this.

 

I have a boost leak tester, removed the MAF, installed tester, attached a small compressor I have, after a few minutes still 0 pressure....I'm thinking wither large boost leak which I cannot hear due to compressor noise, or I'm doing something wrong?

 

Any suggestions guys?

I'd start by systematically going round each intake tract checking all the jubilee clips, also checking the balance bar o-rings and any blanking caps you might have. Then get the compressor on it again

Here is a useful guide on boost leak location:

 

http://www.thumper300zx.com/z32/boostleaks/boost_leak_guide.htm

 

5 psi is considered the safe maximum when pressurising the system.

Spent about 4 hours today, tightened loads of clips, the amount of hoses with clips is mind boggling on these cars, some easy to do, some very awkward.

 

Still got 0 when trying to do the leak test though.

 

What are these?

 

It's the only thing I have found that is open, they sit just under the front of the throttle body at both sides of the plenum.

 

It's the small pipes right in the centre of the photos.

 

Do you have a boost gauge inside the car which shows that it is boosting?

What compressor are you using to blow it up?

The little hoses under the throttle body, one side feeds the carbon canister, and the other feeds the EGR solenoid

What compressor are you using to blow it up?

 

It's an electric compressor I use in the garage for inflating tyres and other stuff, not hugely powerful.

 

I suspect it isn't strong enough, though if there was no leaks I can't see how it wouldn't still increase pressure?

 

- - - Updated - - -

 

The little hoses under the throttle body, one side feeds the carbon canister, and the other feeds the EGR solenoid

 

 

There connectors in the picture do not have anything attached to them at present?

Do you have a boost gauge inside the car which shows that it is boosting?

 

 

When the car is driving it boosts and has vacuum, it just seems a bit laggy.

 

When trying to do this test no boost.

 

There is also a gauge on the compressor which shows 0 as well.

Don't think your compressor is up to it mate. If you had a leak that big, you'd hear the hiss straight off. Might be worth flicking the engine over and trying again though.

It's an electric compressor I use in the garage for inflating tyres and other stuff, not hugely powerful.

 

I suspect it isn't strong enough, though if there was no leaks I can't see how it wouldn't still increase pressure?

 

- - - Updated - - -

 

 

 

 

There connectors in the picture do not have anything attached to them at present?

 

Are you saying these two blue pipes don't have anything connected to the other end? If so, stick a bolt in the end of the hose and zip tie it there. Have you or a previous owner done any of the deletes such as carbon canister, AIV, EGR etc? If so, you'll want to trace all pipes and make sure they're capped as well

 

https://z32.wikispaces.com/Vacuum+Diagrams

Are you saying these two blue pipes don't have anything connected to the other end? If so, stick a bolt in the end of the hose and zip tie it there. Have you or a previous owner done any of the deletes such as carbon canister, AIV, EGR etc? If so, you'll want to trace all pipes and make sure they're capped as well

 

https://z32.wikispaces.com/Vacuum+Diagrams

 

 

My car is an early 93, didn't have AIVS.

 

Someone else has deleted the PRVR thing.

 

EGR and Carbon canister still there.

 

Here is the two pictures again with the little pipes circled that have nothing attached to them, anything that has a blue hose is fully attached at both ends as there are a load of little pipes in the same area but they are all ok.

 

These two pipes circled have nothing on them.

 

Sorry didn't realise you meant those two pipes. To be honest I can't help you there, I have no recollection of mine ever being there so I presume they were already deleted. I can't even check as I'm away at the moment. I'm sure someone else can clarify.

They could be the under plenum water pipes?

That's what I was thinking judging by the diameter but don't remember them being there when I did my bypass