low boost

lexusdave · Apr 8th, 2012, 21:55

hi all my s60 t5 is only boosting at 0.4 bar wont go any higher any ideas anyone could the electronic boost controler cause this
cheers

princepugh · Apr 9th, 2012, 12:11

Could be a boost leak - check all plumbing from the turbo outlet to intercooler to ETM.

Could also be your TCV hoses or TCV so you shoudl check the plumbing in that area too.

And 0.4 bar isn't much above 'base boost' so the TCV could actually have failed and gone into bypass mode.

lexusdave · Apr 9th, 2012, 13:31

How do i check for leaks

princepugh · Apr 9th, 2012, 20:28

First thing probably to check/ tighten all of the jubilee clips on the hoses and visually inspect.

There's a short hose from the turbo outlet behind the engine which connects to the plastic hose running over the top of the engine, which the goes to the intercooler etc. You can trace it all the way around to the intake manifold.

The TCV is clipped onto the side of your airbox, these smaller diameter hoses can be traced an checked for connectivity.

Hope that helps

Apr 8th, 2012, 21:55	#1
lexusdave New Member Last Online: Jan 15th, 2013 13:24 Join Date: Feb 2012 Location: sunderland	low boost hi all my s60 t5 is only boosting at 0.4 bar wont go any higher any ideas anyone could the electronic boost controler cause this cheers

Apr 9th, 2012, 12:11	#2
princepugh Senior Member Last Online: May 29th, 2013 23:24 Join Date: Jul 2010 Location: Sheffield	Could be a boost leak - check all plumbing from the turbo outlet to intercooler to ETM. Could also be your TCV hoses or TCV so you shoudl check the plumbing in that area too. And 0.4 bar isn't much above 'base boost' so the TCV could actually have failed and gone into bypass mode.

Apr 9th, 2012, 13:31	#3
lexusdave New Member Last Online: Jan 15th, 2013 13:24 Join Date: Feb 2012 Location: sunderland	How do i check for leaks

Apr 9th, 2012, 20:28	#4
princepugh Senior Member Last Online: May 29th, 2013 23:24 Join Date: Jul 2010 Location: Sheffield	First thing probably to check/ tighten all of the jubilee clips on the hoses and visually inspect. There's a short hose from the turbo outlet behind the engine which connects to the plastic hose running over the top of the engine, which the goes to the intercooler etc. You can trace it all the way around to the intake manifold. The TCV is clipped onto the side of your airbox, these smaller diameter hoses can be traced an checked for connectivity. Hope that helps

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