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The mkiv Supra Owners Club

Help! Overboost!!!


BigMoistyturbo
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Originally posted by BigMoistyturbo

I'm worried because my j-spec is boosting to 1.3/1.4 bar. All it has it apexi air filter,FCD,Cat back nur spec,HKS SSQ.

What could be causing this?

Before I reach the top of the rev range I'm at 1.4 bar and the car struggles to make the top of the revs!

I still have both my cats in.

 

Get a restrictor ring off CW!

 

Check your plugs!

 

:thumbs:

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Guest Terry S

Moisty, you want to bung in a colder plug like a 7 with more than stock boost. If you can't stretch to Denso IK's then get a set of BKR7ES from Halfrauds.

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Originally posted by HISUPE

Shouldn't overboost with the stock cats in though should it? Only when decatted...................

 

Well, by that I mean to the extent you are seeing, as its possible with cats and an aftermarket cat back system to just creep above the stock fuel/boost cut in certain circumstances. Not as high as you've been boosting though.........

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