Wastegate stuck open
Discussion
Hi guys my turbo blew up on a Astra h 1.7cdti mk5 I have replaced the turbo and then I got a new turbo wastegate solenoid my mechanic replaced that now and told me the wastegate is stuck open and he thinks it's a ecu issue? Do you guys have any idea if it could be the ecu? His telling me that he thinks the ecu is making the wastegate stuck open
OP, in case you hadn't noticed this has been moved into the technical section. All your other threads on your turbo problems were also moved into the technical section, just as all of your what car threads were moved into car buying.
You can post directly into the correct section of the forum.
You can also try updating your existing thread on your turbo problem rather than keep starting new ones so that other posters have the background information.
You can post directly into the correct section of the forum.
You can also try updating your existing thread on your turbo problem rather than keep starting new ones so that other posters have the background information.
MrPetrolHead said:
I wonder if the car was previously remapped? And when i replaced the turbo it decided to keep the wastegate open?
No, your mechanic is a moron.The wastegate can is very easy to see, and it's also very easy to test. So before throwing money on new parts like this mystical "pressure converter"...he should have tested such things.
As said before....these threads often go the same way, because idiot mechanics throw parts at cars at the owners expense because they are idiots ( the mechanic )
Yes some faults can be hard to diagnose, this one should be bloody easy.
So....why exactly was the turbo replaced in the first place ?
Was the replacement unit sourced from a reputable turbo place ? and sold as a complete unit ? ie with wastegate fitted and intact ?
Has the idiot tested the wastegate ? has the idiot tested for vacuum on the line to the wastegate when driving ?
etc etc etc, all very basic stuff.
stevieturbo said:
No, your mechanic is a moron.
The wastegate can is very easy to see, and it's also very easy to test. So before throwing money on new parts like this mystical "pressure converter"...he should have tested such things.
As said before....these threads often go the same way, because idiot mechanics throw parts at cars at the owners expense because they are idiots ( the mechanic )
Yes some faults can be hard to diagnose, this one should be bloody easy.
So....why exactly was the turbo replaced in the first place ?
Was the replacement unit sourced from a reputable turbo place ? and sold as a complete unit ? ie with wastegate fitted and intact ?
Has the idiot tested the wastegate ? has the idiot tested for vacuum on the line to the wastegate when driving ?
etc etc etc, all very basic stuff.
i dont think he tested out anything lol the turbo was blown so i got a refub turbo from ebay he slapped it on but it had no power so he told me to get a new wastegate solenoid he replaced that today then revved it and said its got a problem with the ecu its telling the wastegate to be open at all times he disconnected the vacuum pipe and said the wastegate is closed so the wastegate is working im gonna get it towed to a auto electrician on monday so they could check out the ecu The wastegate can is very easy to see, and it's also very easy to test. So before throwing money on new parts like this mystical "pressure converter"...he should have tested such things.
As said before....these threads often go the same way, because idiot mechanics throw parts at cars at the owners expense because they are idiots ( the mechanic )
Yes some faults can be hard to diagnose, this one should be bloody easy.
So....why exactly was the turbo replaced in the first place ?
Was the replacement unit sourced from a reputable turbo place ? and sold as a complete unit ? ie with wastegate fitted and intact ?
Has the idiot tested the wastegate ? has the idiot tested for vacuum on the line to the wastegate when driving ?
etc etc etc, all very basic stuff.
MrPetrolHead said:
i dont think he tested out anything lol the turbo was blown so i got a refub turbo from ebay he slapped it on but it had no power so he told me to get a new wastegate solenoid he replaced that today then revved it and said its got a problem with the ecu its telling the wastegate to be open at all times he disconnected the vacuum pipe and said the wastegate is closed so the wastegate is working im gonna get it towed to a auto electrician on monday so they could check out the ecu
Holy F.....Bulls
t, the ecu will not tell the w/g to be open at all times. And are you saying he hasnt even driven the car ? he's just revving it expecting it to make boost ?It doesnt need an auto electrician, it doesnt need an ecu. It needs taken to a mechanic who isnt a complete and utter f
ktard to diagnose what is a very very simple problem.And is this the same idiot who said is "special" computer was getting nothing from the car....but suddenly it's telling him little stories ?
FML.
and of course the gate is at a rest position ( which is actually open in terms of ability to make boost ) with no vac....it needs vacuum to operate to allow the turbo to make boost.
stevieturbo said:
Holy F.....
Bullst, the ecu will not tell the w/g to be open at all times. And are you saying he hasnt even driven the car ? he's just revving it expecting it to make boost ?
It doesnt need an auto electrician, it doesnt need an ecu. It needs taken to a mechanic who isnt a complete and utter fktard to diagnose what is a very very simple problem.
And is this the same idiot who said is "special" computer was getting nothing from the car....but suddenly it's telling him little stories ?
FML.
and of course the gate is at a rest position ( which is actually open in terms of ability to make boost ) with no vac....it needs vacuum to operate to allow the turbo to make boost.
his been my dads mechanic for 20+ his been 10/10 mechanic so far i think he is getting old lol well the auto electrician is also a mechanic so he should sort it out hopefully theirs nothing wrong with it Bulls
t, the ecu will not tell the w/g to be open at all times. And are you saying he hasnt even driven the car ? he's just revving it expecting it to make boost ?It doesnt need an auto electrician, it doesnt need an ecu. It needs taken to a mechanic who isnt a complete and utter f
ktard to diagnose what is a very very simple problem.And is this the same idiot who said is "special" computer was getting nothing from the car....but suddenly it's telling him little stories ?
FML.
and of course the gate is at a rest position ( which is actually open in terms of ability to make boost ) with no vac....it needs vacuum to operate to allow the turbo to make boost.
MrPetrolHead said:
his been my dads mechanic for 20+ his been 10/10 mechanic so far i think he is getting old lol well the auto electrician is also a mechanic so he should sort it out hopefully theirs nothing wrong with it
Certainly from what you're described so far....I'd say more like 1/10None of this is in any way complicated so far to resolve. How long someone has been doing anything is meaningless really. Although the fact he's been this clueless for so long is perhaps more reason to avoid in the future. Who knows what other stupid things he has done in the past and cost customers huge amounts of money !
Although if the new guy has maybe 3, 4 brain cells it should be an easy fix for him, or at least a very easy diagnosis.
stevieturbo said:
They are a VNT turbo. Not a VVT engine.
Either way, very basic stuff.
Got it towed to a different mechanic today hopefully he would solve it. Worst thing is i do deliveries with my car i couldn't work for 1+ month Either way, very basic stuff.
This car caused me nothing but stress and emptying my pocketOldGermanHeaps said:
Pretty sure the turbo on those does not have a wastegate, and as such doenst have a wastegate solenoid either. Certainly the last 1.7 astra i worked on had a vnt arrangement.
If I am right that tells you all you need to know about this particular mechanic.
Not a wastegate persay, but it does still have a typical vacuum canister as per an old wastegate setup to control the VNT mech inside the turbine housing. And as such it has a boost solenoid as has already been shown to control vac to this in order to control boost.If I am right that tells you all you need to know about this particular mechanic.
No vac, no movement at the can, no boost ( or very minimal boost )
stevieturbo said:
Not a wastegate persay, but it does still have a typical vacuum canister as per an old wastegate setup to control the VNT mech inside the turbine housing. And as such it has a boost solenoid as has already been shown to control vac to this in order to control boost.
No vac, no movement at the can, no boost ( or very minimal boost )
They usually work in the opposite direction to each other, wastegate will boost until positive pressure tells it not to, whereas vnt wants vacuum to generate boost. If the mechanic is getting the 2 confused he will be seeing the opposite of what he expects.No vac, no movement at the can, no boost ( or very minimal boost )
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