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Won't let me rev past 5000 rpm 

 

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JAYZ 400RWKW XR6T
 Post subject: Won't let me rev past 5000 rpm
Posted: Sun Apr 07, 2013 6:55 pm 
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G'day fellas just wondering if any one might know why
My xr6t won't let me push past 5000rpm if any one can help
Me pls let me know cheers and have a good 1 oh and all internals are done
And what not cheers
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SWC
 Post subject: Re: Won't let me rev past 5000 rpm
Posted: Sun Apr 07, 2013 7:19 pm 
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Does it rev ok up to 5000rpm, or is it slugish?
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JAYZ 400RWKW XR6T
 Post subject: Re: Won't let me rev past 5000 rpm
Posted: Wed Apr 10, 2013 11:52 am 
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Sorry for late reply but na the boost is fine come's on hard
But the moment u hit 5000rpm it's like it's getting to much fuel
Taken it to the shop he sed something with the computer
But could not fault it do scratching my head on this one
Thanks for your help mate
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trbo 6
 Post subject: Re: Won't let me rev past 5000 rpm
Posted: Thu Apr 11, 2013 1:00 pm 
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I had a simlar thing happen to me, would not rev passed around 4000rpm. Ended up being my fuel pump.
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JAYZ 400RWKW XR6T
 Post subject: Re: Won't let me rev past 5000 rpm
Posted: Thu Apr 11, 2013 4:47 pm 
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Well I'm gonna try that then worth a shot
Thanks for the help
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TROYMAN
 Post subject: Re: Won't let me rev past 5000 rpm
Posted: Tue Apr 23, 2013 10:20 pm 
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how much boost you running??? have the valve springs ever been upgraded??
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locknut
 Post subject: Re: Won't let me rev past 5000 rpm
Posted: Sat Jun 01, 2013 12:44 pm 
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If you've one or both mild bolt ons like an intercooler upgrade, or a catback exhaust, it will hit boost cut when it's under load, like 2nd or 3rd gear. You will need a tune to sort this, and should look at upgrading your fuel pump as stated.. I'd recommend getting some injectors, a Walbro, a cat, and go from there.

*** Just re-read your username.. guessing you have all this and more... ***

 

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BongoKongo
 Post subject: Re: Won't let me rev past 5000 rpm
Posted: Thu Jun 20, 2013 1:13 pm 
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I had that @ around 5000rpm & it turned out that the tuner had left the transmission torque reduction at the standard setting. The ECU was reading the high Revs & freaking out & it started overriding the FBW throttle, timing & fuel.
Symptoms: Vehicle goes like a Rocket up to 4500-5000rpm & then it coughs/splutters & feels like it is starving for fuel or the spark is breaking down. But if you just back off the throttle a little when it happens & then sink the boot once again it picks up & goes like a rocket as if nothing is wrong..

Took a while to sort this problem out & was only fixed when I switched to a different tuner.
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EBXR8380
 Post subject: Re: Won't let me rev past 5000 rpm
Posted: Thu Jun 27, 2013 8:56 pm 
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Tighter plug gap can fix spark blow out issues..

 

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