Turbo problems
Discussion
Hi All,
After some advice on my car. Its an 04 A3 2.0TDI (BKD Engine) 110k miles.
Last week the turbo went, it had gone into limp mode a couple of times the week before (overboost), along with making a siren noise and being a bit smokey, and on Monday just gone it went in a cloud of smoke. So had turbo replaced at a garage, with a recon unit from eurocarparts. New oil feed pipe fitted, Cat washed out, intercooler drained of the oil that had been blown through into it (after garage had fitted turbo they started the car and it wouldn't rev, so they discovered intercooler full of oil). Garage test drove it and I collected it this morning. It was noticeably not as quick as before the turbo going, the only way i can describe it is sluggish, it feels like it doesn't want to climb through the rev range.
This evening, dropping the girlfriend off for her works party, joining the motorway and limp mode again, I wasn't even booting it, just accelerating to get up to 70. So I stop and turn it off and on again and drop her off, then on the way back, at a roundabout the car sort of bogged down for a second and then loosened up. Great i thought, maybe just burning a bit of oil out the exhaust or intake, and then for a few miles it drove just as it should, perfectly. Then limp mode again on a dual carriageway when pulling out to overtake, and now it is back to being sluggish.
So, any ideas?
I know first thing is scanning for codes to see what the car thinks is going on, but I can't do this until tomorrow, and then I will ring the garage on Monday, but they shut from Christmas Eve until the new year, so don't know what they will be able to do in a day.
Apologies for the essay, but I wanted to include as much detail as possible.
Thanks in advance,
Smithy
After some advice on my car. Its an 04 A3 2.0TDI (BKD Engine) 110k miles.
Last week the turbo went, it had gone into limp mode a couple of times the week before (overboost), along with making a siren noise and being a bit smokey, and on Monday just gone it went in a cloud of smoke. So had turbo replaced at a garage, with a recon unit from eurocarparts. New oil feed pipe fitted, Cat washed out, intercooler drained of the oil that had been blown through into it (after garage had fitted turbo they started the car and it wouldn't rev, so they discovered intercooler full of oil). Garage test drove it and I collected it this morning. It was noticeably not as quick as before the turbo going, the only way i can describe it is sluggish, it feels like it doesn't want to climb through the rev range.
This evening, dropping the girlfriend off for her works party, joining the motorway and limp mode again, I wasn't even booting it, just accelerating to get up to 70. So I stop and turn it off and on again and drop her off, then on the way back, at a roundabout the car sort of bogged down for a second and then loosened up. Great i thought, maybe just burning a bit of oil out the exhaust or intake, and then for a few miles it drove just as it should, perfectly. Then limp mode again on a dual carriageway when pulling out to overtake, and now it is back to being sluggish.
So, any ideas?
I know first thing is scanning for codes to see what the car thinks is going on, but I can't do this until tomorrow, and then I will ring the garage on Monday, but they shut from Christmas Eve until the new year, so don't know what they will be able to do in a day.
Apologies for the essay, but I wanted to include as much detail as possible.
Thanks in advance,
Smithy
Thanks for all the replies so far. I'm just about to go and collect my obd2 scanner from a mate I let borrow it.
As for the actuator, I was assuming it would come preset from the people who did the recon?
This is the part http://www.eurocarparts.com/ecp/c/Audi_A3_2.0_2004...
As for the actuator, I was assuming it would come preset from the people who did the recon?
This is the part http://www.eurocarparts.com/ecp/c/Audi_A3_2.0_2004...
Scanned the car and got P0299 underboost condition.
obd2 logger is showing no more than 8psi boost (with a correction value of 0, there was the option for +/- 14.7psi.).
I also looked at intake manifold pressure vs boost and they correlated, so does this mean less likely to be a leak?
I'm leaning towards vacuum problem?
Any further thoughts appreciated!
obd2 logger is showing no more than 8psi boost (with a correction value of 0, there was the option for +/- 14.7psi.).
I also looked at intake manifold pressure vs boost and they correlated, so does this mean less likely to be a leak?
I'm leaning towards vacuum problem?
Any further thoughts appreciated!
Well as I said, the intake filled with oil when the turbo went, as the cooler needed emptying. If the MAP sensor has been affected, could it make it read too low, hence the car thinks its underboosting and not providing the fuel to match, making it sluggish?
Average mpg is down too, but I'm assuming thats to be expected with a boost problem.
Can a MAP sensor be cleaned with contact cleaner or similar? I was intending to have a look earlier once the codes were scanned but got stuck for over an hour in traffic due to a crash and a closed road, so i've not had the chance.
Average mpg is down too, but I'm assuming thats to be expected with a boost problem.
Can a MAP sensor be cleaned with contact cleaner or similar? I was intending to have a look earlier once the codes were scanned but got stuck for over an hour in traffic due to a crash and a closed road, so i've not had the chance.
Crafty_ said:
It might be worth getting hold of a mittyvac so you can check for proper solenoid/actuator operation and the like.
I've got a mitivac, however the turbo is a pain to get at, as its between the head and the bulkhead, so can't be seen from above without removing the air intake, and from below you can't see the actuator rod move as it's on top of the turbo! So best way will be with a mirror or similar and some bendy arms! Will see what the garage says tomorrow, but if they can't help (only open for the day then shut for xmas), I guess i could connect the vac line to the mitivac to see what vacuum it is pulling? However it won't request full boost in neutral will it?
ch427 said:
someone who knows a bit more will be along soon but i believe the boost pressure should read about 14 psi less than a map sensor (atmospheric pressure)
It does, at idle boost reads 0psi and inlet manifold pressure reads 14 (+/-0.5)When driving they both rise accordingly, up until 8 at boost and 22 at inlet and then no further.
When it dumped all the oil into the cooler and intake, i'm wondering if it could have fouled the MAP sensor. Although I would have expected it to have killed it as opposed to making it read low?
Just an update to this.
Garage have rung, the fins from the intake impeller have sheared off the new turbo and got lodged in the intercooler. Luckily they got no further.
So the turbo is coming off again and is going back for a refund. I have the original turbo to prove that its not missing any bits which could have caused the new one to fail. Along with receipt for new oil feed pipe etc.
Garage are supplying and fitting a new garrett turbo, but wont be done until after Christmas.
Chalk it up to experience I guess, I won't be using a recon turbo ever again.
Garage have rung, the fins from the intake impeller have sheared off the new turbo and got lodged in the intercooler. Luckily they got no further.
So the turbo is coming off again and is going back for a refund. I have the original turbo to prove that its not missing any bits which could have caused the new one to fail. Along with receipt for new oil feed pipe etc.
Garage are supplying and fitting a new garrett turbo, but wont be done until after Christmas.
Chalk it up to experience I guess, I won't be using a recon turbo ever again.
I know, mechanic said it was lucky as it would have been an engine written off if it had got much further. Which would have meant i'd have probably got rid of the car.
I've got my fingers crossed for a warranty refund, as it had all the t&c's adhered to, new oil lines to turbo, oil/filter change/engine flush, turbo primed prior to engine being run etc. Also I have the old original turbo and everything is still intact, which means no debris from that one was left in the air intake to damage the new one.
I've got my fingers crossed for a warranty refund, as it had all the t&c's adhered to, new oil lines to turbo, oil/filter change/engine flush, turbo primed prior to engine being run etc. Also I have the old original turbo and everything is still intact, which means no debris from that one was left in the air intake to damage the new one.
Garage reckons possibly not balanced absolutely perfectly, so caused blades to foul on edge of casing.
I've also read somewhere that garret don't supply replacement parts for these turbos, so any 'new' parts used to recondition the turbo are actually likely to be copies from the far east or similar.
I've also read somewhere that garret don't supply replacement parts for these turbos, so any 'new' parts used to recondition the turbo are actually likely to be copies from the far east or similar.
Gassing Station | Home Mechanics | Top of Page | What's New | My Stuff