Popping noise

[northernblue]

New mounts , new tcv ,new boost solenoid new turbo.

Its been in the garage today , the fella says the fat pipe to the egr should be hard when the engine is running , which it isn't.

Can a problem with the egr cause a vacuum leak?

[davebb]

Hi what fat pipe to egr ?
Do you mean the air pipe to the EGR mixer pipe then to the engine inlet,
This pipe will only be hard when the car is making boost pressure , it will not make boost on tick over,
if it is this pipe run away do not use this garage , he does not have a clue,
Yes the egr can make a vacuum leak if not closing, the egr valve should be closed when car is making boost,
Dave

[northernblue]

Originally Posted by davebb

Hi what fat pipe to egr ?
Do you mean the air pipe to the EGR mixer pipe then to the engine inlet,
This pipe will only be hard when the car is making boost pressure , it will not make boost on tick over,
if it is this pipe run away do not use this garage , he does not have a clue,
Yes the egr can make a vacuum leak if not closing, the egr valve should be closed when car is making boost,
Dave

At a loss really , i will put that to them .

Having replaced most things and still having a problem , I'm not sure what's next.

The car has no guts down low but at motorway speeds its got power??

[davebb]

Hi you need to log the boost vs rpm, do this in 3rd gear,
is this why you have fitted a new turbo,
have you tested it for any boost leaks,
Dave

[davebb]

is there any smoke when the car is driving

[northernblue]

No smoke , btw I'm no mechanic.

[northernblue]

I fitted the turbo because everything pointed at the turbo.

My guess now is the problem is before the turbo but not sure what, most garages are clueless to this engine.

[smk70]

Had a similar problem with my 2003 D5 Manual. The cause was a low vacuum output from the vacuum pump at lower revs. Needs to be checked with a vacuum gauge to see if the vacuum is good at idle and low revs.
I fitted a second hand vacuum pump and the power at lower revs returned.

[davebb]

Originally Posted by northernblue

I fitted the turbo because everything pointed at the turbo.

My guess now is the problem is before the turbo but not sure what, most garages are clueless to this engine.

I don't know why, it is simple, I am not a mechanic,
Has a boost leak test been done ? do a boost leak test/ smoke test,
remove the plastic panel under the intercooler, is there any oily gunge under there, if there is you need a intercooler, but do a smoke test,
Dave

[davebb]

Originally Posted by smk70

Had a similar problem with my 2003 D5 Manual. The cause was a low vacuum output from the vacuum pump at lower revs. Needs to be checked with a vacuum gauge to see if the vacuum is good at idle and low revs.
I fitted a second hand vacuum pump and the power at lower revs returned.

Yes that is a very good point,
Dave