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No Turbo ?

Paul Richardson

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Only owned my RCZ two days, bought privately, did all my research, it drove perfectly, tested it four times. Took it for a long run today, first hour was fine, then on way home, feels like no turbo, no boost, but no warning lights on dash. Any clues anybody?
 

Marmite

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Have u checked all the pipe work is it burning oil ? I had mine overhauled by midland turbo not that dear ether
Is it a petrol or diesel
 

Paul Richardson

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It’s a petrol, haven’t checked anything yet. Probably take it to my garage tomorrow morning, hook it up to check error codes, but weirdly nothing has shown on the dash.
 

2retro

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I would hold off taking it to the garage straight away. Can be many things that trigger the ECU to think there may be a problem and put the car into limp mode (no turbo) to protect the engine. BUT if there is no issue after a certain period of time or miles it will figure it made a mistake and engage the turbo again. It's happened to me before but I couldn't tell you the exact criteria until it's OK again but it's something like 5 or 7 drives of X amount of miles or something like that. Hope that helps!
 

2retro

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Just checked and it's called '5 Trip Logic' - meaning if the fault was not present for 5 continuous drive cycles the fault will get permanently removed from the memory. The drive cycle depends on the type of failure. Can be just ignition on, warm up cycle or X amount of miles traveled. 👍
 

Goatz

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Have u checked all the pipe work is it burning oil ? I had mine overhauled by midland turbo not that dear ether
Is it a petrol or diesel
Just out of interest, how much did it cost?
 

Pedro

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Check the Diverter Valve it may be seals leaking or it may be failing altogether
 

Nekminute

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similar issues with mine, made a separate topic

On vacation in France right now which is lovely this time of year.
On the way here though when we hit the hills i felt i had no power at all i cant hear the turbo spool up no boost nothing. Neither did i get anything on the dashboard... After the car cools down and i drive off again it behaves like normal until it gets warm again and stops
 

Ravenous

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Similar issue with mine (1.6 THP 156) although when you really floored it uphill I was getting error code p0299 low boost pressure.

- Checked the wastegate on the turbo on startup and it wasn’t moving. (It should move).

- moved the wastegate back and forth via the rod with some pliers and it moved ok so wasn’t stuck.

- removed the vacuum hose on the wastegate. Moved the rod and held the end of the vacuum hose pipe to create pressure and thus create vacuum and then released the rod. Rod stayed where it was and moved back when I moved my finger from the end of the vacuum hose pipe. So diaphragm in the wastegate looked ok and holding vacuum.

- checked for no vacuum coming from the boost solenoid. This is in the most awkward position on these engines, back of the engine at the bottom under the intake manifold. Got under the car to take a look, luckily there is just enough room between the exhaust, engine block and sump to see it. The 3 vacuum hoses were connected.

- However, I spotted a vacuum hose not attached to anything. Turns out the hose had popped off from the vacuum reservoir just below the boost solenoid. Popped it back on (which was a bit awkward) and turbo was working fine.
 

Goatz

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Similar issue with mine (1.6 THP 156) although when you really floored it uphill I was getting error code p0299 low boost pressure.

- Checked the wastegate on the turbo on startup and it wasn’t moving. (It should move).

- moved the wastegate back and forth via the rod with some pliers and it moved ok so wasn’t stuck.

- removed the vacuum hose on the wastegate. Moved the rod and held the end of the vacuum hose pipe to create pressure and thus create vacuum and then released the rod. Rod stayed where it was and moved back when I moved my finger from the end of the vacuum hose pipe. So diaphragm in the wastegate looked ok and holding vacuum.

- checked for no vacuum coming from the boost solenoid. This is in the most awkward position on these engines, back of the engine at the bottom under the intake manifold. Got under the car to take a look, luckily there is just enough room between the exhaust, engine block and sump to see it. The 3 vacuum hoses were connected.

- However, I spotted a vacuum hose not attached to anything. Turns out the hose had popped off from the vacuum reservoir just below the boost solenoid. Popped it back on (which was a bit awkward) and turbo was working fine.
Excellent information
I have this exact error code.
I would be eternally grateful if you could help me identify the detached hose. I am not familiar with any of the components you referenced
 

Ravenous

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Excellent information
I have this exact error code.
I would be eternally grateful if you could help me identify the detached hose. I am not familiar with any of the components you referenced
No worries, have you done all the other checks to see if your wastegate is moving back and fourth on startup etc?
 

Goatz

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Yep pretty sure the waste gate is good. I can’t see any detached hoses anywhere, but I am not sure where to look
 

Ravenous

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If the wastegate is moving on engine startup then there will not be a vacuum issue (no disconnected vacuum hoses).

Might be an issue with a cracked hose from the turbo to the intercooler or from the inter cooler to the air intake so check them carefully. It could also be a loose gate inside the turbo which can only really be checked by removing the exhaust down pipe to view and inspect the gate itself.
 

Goatz

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The metal pipe that opens the waste gate seems to have a little play in it. Is that normal?
 

Ravenous

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There may be a little play in the rod itself, what you need to check is where the arm joins with the body if the turbo, if that is moving then it will be loose and moving inside the turbo and not sealing correctly. You will have to remove the heat shield from around the turbo to access it but I think it’s 4 or 5 bolts.

Check out this video, shows the same identical engine on a Mini.

 

Pedro

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You mean the Actuator ? They can get play in them but it would need to excessive to cause a issue
 

Ravenous

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I would check the simple things first like split hoses etc. Then as Pedro suggested in his earlier post check the diverter valve to ensure the seals inside it are ok (again simple to do on this turbo as it is held on to the turbo with 3 bolts - just be careful as the internals of the diverted valve may be a little fragile when taking apart). Then go on to inspect the wastegate actuator (the basics as I mentioned in my earlier post with regards to movement and vacuum - but you have done these and look ok). The actuator is a small pump that uses vacuum to move a rod outside the turbo which in turn opens and closes the actual wastegate inside the turbo. The actuator rod can have a little play but the ARM where the rod attaches to and the ARM attached to turbo casing should not move. If it does then the wastegate inside the turbo is loose and not holding vacuum so the turbo may require reconditioning. A good turbo specialist can check this for you and recon if required.
 
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