Help! Low boost - new sound

[deadlast]

With the mishimoto charge pipes you're going to notice less of a "climax" with the pressure drop of the larger diameter tubing.

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[thomas.mcniven]

With the mishimoto charge pipes you're going to notice less of a "climax" with the pressure drop of the larger diameter tubing.

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Good to know. Thanks!


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[FiSTicuffs]

Here you go, the 7.04 will vary per the ford tech as this is a batch number

 

[thomas.mcniven]

Awesome. Thank you!


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[FiSTicuffs]

No problem, hope you solve your issue!

 

[FiSTicuffs]

Silly question, did you accidentally switch your map slot to eco mode? Meaning WG boost only (~4-8psi)?

 

[deadlast]

Silly question, did you accidentally switch your map slot to eco mode? Meaning WG boost only (~4-8psi)?

Good point! I always fear I'll switch to my e30 slot on accident when using cruise control.

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[thomas.mcniven]

Bummed out. Didn’t work.


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[TyphoonFiST]

Bummed out. Didn’t work.


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Turbo spent/ seized?

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[thomas.mcniven]

Silly question, did you accidentally switch your map slot to eco mode? Meaning WG boost only (~4-8psi)?

No. I’ve tried it on custom tune, Cobb OTS and with AP unmarried. Drives with less power than stock. Maybe it’s time to rebuild the turbo...


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[thomas.mcniven]

Turbo spent/ seized?

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Hope not, but maybe. Any suggestions for good value replacement?


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[thomas.mcniven]

Turbo spent/ seized?

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I would think the dealership would have caught a spent turbo, but who knows. Are there any items I can log with the AP to verify?


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[TyphoonFiST]

I would think the dealership would have caught a spent turbo, but who knows. Are there any items I can log with the AP to verify?


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Best way to check is to take the hose off the in inlet and move the compressor from side to side to check for play and move it in and out and even spin it. Look for oil also in the inlet hose....

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[FiSTicuffs]

Man that sucks... what mods are you running? Didnt see a list anywhere.

 

[thomas.mcniven]

Man that sucks... what mods are you running? Didnt see a list anywhere.

Basically Mountune MR 230 without the downpipe, Mishimoto hard pipes, FSWerks short shifter, aluminum flywheel, Spec stage 2 clutch, AP with Mountune tune, carbon fiber shift knob


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[FiSTicuffs]

Another silly question, have you inspected all clamps, elbows, piping and welds from your cold side? I have heard a few issues in the past of:

COBB charge pipe cracked weld on support bracket.
Couplers blown off due to clamps loose after a tune.
Welds cracked on support flanges for intercoolers.

All of these scenarios would give you reduced boost, a loud hissing sound and may not throw a code. After everything else and now this last bit of advice, I am at a loss. Good luck to you! Let us know what you find.

 

[thomas.mcniven]

Another silly question, have you inspected all clamps, elbows, piping and welds from your cold side? I have heard a few issues in the past of:

COBB charge pipe cracked weld on support bracket.
Couplers blown off due to clamps loose after a tune.
Welds cracked on support flanges for intercoolers.

All of these scenarios would give you reduced boost, a loud hissing sound and may not throw a code. After everything else and now this last bit of advice, I am at a loss. Good luck to you! Let us know what you find.

Didn’t check the intercooler. I’ll do that as well.


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[Quisp]

Try diverter valve. Mine wouldn't go over 16psi and that was the culprit.

 

[thomas.mcniven]

So my son hit a dip pretty hard... and all of a sudden the boost is back. I’m at a complete loss. Any guesses?


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