Sunday, November 04, 2007 - 08:12 pm, by: Luke Burt(Burt)
Hey all, Please take the time to read this, i would really appreciate any responses!
OK, so my car has been off the road for a good month now as i was waiting for my T3G's to come in, I got them earlier this week and fitted them today. I took it for a test drive, and i't won't boost over 7psi.
My fuel pump ecu seems to have died, the car won't run unless i have the FP and B+ diagnostic terminals joined, so thats one of my questions, with the terminals joined like that, is the fuel pump not given enough power to provide enough fuel?
Also, i am using just a manual boost controller, hooked up the exact same way as my standard turbo's. Now i tried winding it all the way up, and all the way down, no change in boost, 7psi max.
So im thinking it could be a small boost leak somewhere? as my boost controller is doing nothing, but i'd assume if i wound the boost from 10psi to 15+ psi, that the leak could only release a certain amount of pressure, so raising the boost would, despite the leak, still raise the boost slightly. So a leak seems not really possible..
I can't think of any ideas so maybe you guys can help me?
Monday, November 05, 2007 - 01:27 pm, by: Luke Burt(Burt)
Also, does anyone know what the T3G actuators are set at? I was thinking my wastegate could be jammed open, or my boost controller isnt working properly so my actuators are operating.
Will disconnect and plug the actuator hoses, see if it will allow me to boost over 7psi.
Monday, November 05, 2007 - 07:27 pm, by: Luke Burt(Burt)
Another update..
One of my wastegates was jamming open, fixed that problem. Went for a run with the actuators disconnected. it is maxing out boost at just under 15psi or so, i hold it at the floor all the way through 2nd let it shift to third, no boost cut. with actuators disconnected.. buggered if i know how there is a boost restriction happening, but anyway, it was good like that for a while, then went back to the 7 odd psi max.. gave it a few runs, wouldnt go over 7, pulled over, both wastegates were closed... went for another run, still wouldnt go over 7.
Quite clueless as to whats happening, though the wastegates may be opening of their own accord somehow. I've just reconnected both actuators and removed my boost controller, will go for a drive tonight and see how that goes, at least neither of the turbo's will max themselves out this way..
But yeah, if anyone can explain whats happening that would be great..
Monday, November 05, 2007 - 07:53 pm, by: Andrew Stewart(Daboom)
do you have the boost controller vacuum tap running the right way. i have a turbosmart 2 stage boost controller, and i know if you have the arrow facing the wrong way, it will practically open the wastegates straight away and only run at the wastegate actuator. generally the arrow points from the turbo to the inlet manifold (or any line you are tapping into just as long as the arrow points away from the turbo). hope it helps
Tuesday, November 06, 2007 - 08:00 am, by: Luke Burt(Burt)
Will get Pics this arvo Mustafa, Although you won't be able to see much. What do you mean by twin ports on the wastegate? each actuator only has one outlet on it. Will a bleed valve still work to control the boost? i may put that back on tomorrow to see how i go. But i still don't understand why with the actuators disconnected it would only run a max of 14-15psi, and then it dropped back to a max of 10psi.
Tuesday, November 06, 2007 - 05:55 pm, by: Luke Burt(Burt)
OK, the first picture is showing the hose thats joining my actuator to the nozzle in my turbo outlet.
The second picture is a close up of the nozzle in my turbo.
Other turbo is set up exactly the same. With this setup it will not boost over FIVE psi.
You mention the t3g's have twin ports on the wastegate, what does that mean? do you mean a twin port actuator? if so, im pretty sure my actuators are single port...having only one connection on them.
Also note that my car has been fairly slow to boost up in all the above situations, bar the few times it hit 15psi, it seemed to spool quite quickly then.
Wednesday, November 07, 2007 - 10:34 am, by: Cihan Aday(Cihan)
Luke, sorry for not replying to your email i've been busy.
If you've used gasket goop around the pressure outlets on the turbo's, this needs to go. Either use a Toyota metal gasket or apply a very very thin film of silicon gasket with a razor blade and bolt together.
Your actuators are fine in principal (my set had similar single port items also, different revision of the turbos perhaps?) but the wastegates might not be sealing completely/ ie stuck open for some reason. It happens if the actuator rod has been bent during assembly etc.
Since you're seeing random behavior my guess is its a blockage of sorts, or the standard BOV is not closing. On the rear of the engine, on the left hand side of the block there is a metal vacuum hose to rubber hose connection - make sure it was plugged up after the turbos were swappped. It is the vacuum source that keeps the BOV closed under boost.
Anyways let us know how it goes. I can get those parts in for you BTW, will email you this arvo.
Wednesday, November 07, 2007 - 11:07 am, by: Luke Burt(Burt)
No Worries Cihan, thanks for getting back to me. I am going to be pulling all the piping off this weekend to adjust the actuator rods and check that both wastegates are closing properly etc, so i will scrape all the gasket goo off. I have the toyota metal gaskets just didn't think they would seal all that well. I considered the standard BOV, The metal to rubber vacuum hose is connected to my Blitz BOV, if its the one im thinking of. I will update again when i get home..
Thursday, November 08, 2007 - 03:58 pm, by: Luke Burt(Burt)
Yeah Cihan, the metal to rubber hose is connected to my Blitz BOV, was like that on the standard turbo's also. Over the weekend im gonna pull the piping off again and adjust both actuator arms, and i will plug the hose that goes from the stock BOV back to the inlet piping so that way if it is opening, it won't leak boost..
Upon further inspection of my old turbo's, they wouldnt have stood a chance even if they weren't DD ones, the guys used lots of gasket goo around the oil lines, the oil feed on both turbo's was pretty much completely blocked by gasket goo, minus a tiny pin hole, and the actuator arm on my back turbo was hitting the oil lines before coming anywhere near opening the wastegate, i couldn't beleive how dodgy the install was.
Friday, November 09, 2007 - 09:06 am, by: Luke Burt(Burt)
Yeah, ill keep updating this thread anyways lol, that way if someone gets T3G's and comes accross a similar problem, they can read all my bullshit and possibly fix the problem
But yeah with the stock BOV now blocked it seems to have made a difference to spool times etc, will adjust those actuator arms this weekend and then go for a run with the bleed valve back on.
Saturday, November 10, 2007 - 08:08 am, by: Luke Burt(Burt)
Hooked up the boost controller again yesterday, success! Although, with my actuators having 5psi springs in them, i have a feeling that my bleed valve even wound fully out won't be able to bleed enough boost to stop the wastegates opening, would i be correct?
Anyway, still have to adjust the actuator arms when i get time as they are definately not tight, once that is done will try the bleed valve wound fully out. But yeah, at 10psi the car is producing a fair bit more power than before. I used my mates car as an example, a supercharged vx running extractors exhaust, chipped n tuned, and a smaller pulley on his charger running 10psi.
With old turbo's at 14psi, i was about neck and neck(and apparently his knock sensor was going off at 4500rpm). So his car is all fixed and i Did a few runs against him last night at 10psi, and pulled away nicely.
Happy with that
But yeah, If your not coming up to queensland any time soon ill road trip it down to you Cihan..
Will need to get in touch with you again soon to know what else i'll need and what boost you think i should run the car at etc. Will need to know if im gonna need 440's or not.
Friday, November 16, 2007 - 12:49 pm, by: Braden Murdoch(Ribfeast)
Just put a plug in the stock BOV and run with no BOV, see if it boosts better. BOV is just there to stop the flutter noise down the intake. If that fixes the problem, then make the plug permanent and fit an aftermarket BOV. The stock ones are known to leak.
Friday, November 16, 2007 - 12:59 pm, by: Luke Burt(Burt)
Thanks Braden, But if you read, I've already blocked my stock BOV, and it did make a little difference to spool times etc, i put a 52mm welch plug and tapped it in with a bit of loc-tite, fits prefect, and i have always had an aftermarket one, if you read my posts.
But thanks anyway.
PS. I've pretty much fixed this problem if you read through, so no need for anyone to spend time replying anymore. Thanks for the help.
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