no boost, help!

[__B3NNY__]

thats wierd . so its bennys car you got isit mate .

yeh is my old one mate.

copy and pasted from the vag-com section...

I said to him about unplugging the MAF, apprently it made no difference, im going to rescan and check the actuator tonight.

unless the N75 is totaly goosed i cant see it being that as there is no boost what so ever. As far as the coil goes i heard it this morning and it didnt sound like it was running on 3 cylinders although it wouldnt suprize me as 2 of them are over 3 years old.

It really did stink of rotton eggs this morning which brings me onto the cat... never heard of a miltek failing tho?

 

[mr_D]

i would be looking at the turbo and not any wiring. the turbo should boost without any help from any electrical part or fuse. the boost is only controlled by the electrical parts and if one fails then there should still be some sort of boost there. check everything linked to the tubo. as benny said take off the inlet and see if the turbine spins freely! check acurator and if you want some fun take the vac pipe of the acurator and block both off. see if you boost then

 

[__B3NNY__]

A blocked cat would reduce the boost to 0 tho wouldnt it? And also cause the eggy smell?

 

[Big_daddy]

A blocked cat would reduce the boost to 0 tho wouldnt it? And also cause the eggy smell?

so what is it exactly boosting at? is dead zero on load?

 

[__B3NNY__]

Dead zero, IE no spool the only time i had this was when a washer landed itself in my old k03s.

 

[Big_daddy]

any smoke from the exhaust?
what cat do you have?

 

[mr_D]

yeah a blocked cat would cause alot of back pressure and this would in turn jam the spool (or the turbine from spining for the non understanding ppl) but i dont see how this would give 0 boost. to see the car would be alot of help but i aint travelling miles> where is the car now?

check what i have stated above and see if that gives any results. i will also start rattling my brain to see if i can get it to work!

 

[Big_daddy]

yeah a blocked cat would cause alot of back pressure and this would in turn jam the spool (or the turbine from spining for the non understanding ppl) but i dont see how this would give 0 boost. to see the car would be alot of help but i aint travelling miles> where is the car now?

check what i have stated above and see if that gives any results. i will also start rattling my brain to see if i can get it to work!

x2, i suspect the actuator . have you had looked at top ic piping for excess oil?

have you tried adjusting the actuator to see any different?

 

[Spud_G40]

You looked at the actuator arm/rod yet to see if its loose? I'm almost certain its that.

Then like Mr D says I would be looking at the turbo itself next.

 

[mr_D]

do yo know anyone who has a vacum/pressure tester! i used on on my old acurator and this helped my diagnose that i had a fault with it. might be worth it is you can get hold of one

 

[__B3NNY__]

any smoke from the exhaust?
What cat do you have?

Its a 100cell miltek race cat its the first I`ve heard if it has failed?

When he drove off this morning there was a tiny swirl of smoke but nothing excessive or blue.

yeah a blocked cat would cause a lot of back pressure and this would in turn jam the spool (or the turbine from spining for the non understanding ppl) but i dont see how this would give 0 boost. to see the car would be alot of help but i aint travelling miles> where is the car now?

check what i have stated above and see if that gives any results. i will also start rattling my brain to see if i can get it to work!

Cars still in Oxford mate as he lives just down the road from me, I think it was monday that the boost dropped to around 10-12psi and now has gone to 0 which makes me think the cat started to collapse which reduced the boost but has now totally collapsed and completely blocked the cat?

Sounds alot louder and a different tone too.

 

[__B3NNY__]

You looked at the actuator arm/rod yet to see if its loose? I'm almost certain its that.

Then like Mr D says I would be looking at the turbo itself next.

No, im going to look at this tonight, also i have got Dale to whip the TIP off and make sure the turbine is still spinning free and next to no movment in the shaft.

I`ll check the IC pipes tonight for any oil.

Only reason im thinking the cat is due to the fact it stunk of eggs this morning when he left my work. Also the fact that fuse 8 blew, lambda over heated and blew the fuse?

 

[__B3NNY__]

You looked at the actuator arm/rod yet to see if its loose? I'm almost certain its that.

Bag of nobbys nuts for you SIR!

I`ve just got back from the test drive and im glad to say its now back to the way it should be!

It seemed that the locking nut on the actuator had worked its way loose and the rod slackend itself off to the last thread! Wastegate CLOSED!

Happy days, Dale is over the moon and i dont look like i sold a duff car!

 

[Big_daddy]

Gald you got it sorted now. lol

 

[Spud_G40]

Good stuff mate, glad its all sorted. Exact thing happened to me, must just be heat over time. 0 boost has to be mechanical like the turbo itself.

 

[mr_D]

i would be looking at the turbo and not any wiring. The turbo should boost without any help from any electrical part or fuse. The boost is only controlled by the electrical parts and if one fails then there should still be some sort of boost there. Check everything linked to the tubo. As benny said take off the inlet and see if the turbine spins freely! Check acurator and if you want some fun take the vac pipe of the acurator and block both off. See if you boost then

^^^^^^^^^^

 

[Spud_G40]

You won Mr_D?

Nope... I posted it on the first page

 

[mr_D]

not about winning mate!

lol

but we both know what was wrong.

 

[Spud_G40]

I know mate, just a bit of banter! haha

 

[mr_D]

I know mate, just a bit of banter! haha

i know dude.