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Rb20Det Dying Off At 5000Rpm

benoss

By benoss,
in Engines & Forced Induction

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benoss Enthusiast

benoss

Posted
Posted

Hey guys, so my r32 boosts fine up until just before 5000rpm and then I kinda just dies off and only gains revs quite slowly. It's as if it's kinda staving for fuel as it'll sometimes splutter a tiny bit like not bad but it does every now and again. I'm leaning towards fuel pump and it takes awhile to start in the morning when it first gets started like it'll fire and then stall unless I rev it up. It used to pull so much harder when I first purchasing the car around a year ago. All is pretty standard, rb25 turbo, front mount splitfire coils and that's about it. Thanks in advance!

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https://www.sau.com.au/forums/topic/451182-rb20det-dying-off-at-5000rpm/
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Leeroy94 Enthusiast

Leeroy94

Posted
Posted

If you think its a gasket, get a hose or piece of flexible pipe and put one end to your ear and with the other end scan the outsides of the manifolds. If there is a leak you will be able to hear it.

Of course the car needs to be running to do this.

Other basic things to check are:

Fuel filter

Fouled plugs (spluttering) - also check spark plug gap if you have feeler gauges

Fuel pump - as mentioned

Wouldn't hurt to do a compression test. Engine could just be tired in general.

Without tuning, the rb20det engine torque curve starts decreasing at around 5500-5700rpm anyway. Unless you're in 1st or 2nd it doesn't really pull hard past those figures.

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