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Loss of power at 6,000 RPM

Posted: Sat Apr 05, 2014 1:50 pm
by mndc5
2005 RSX-S
KPRO SN# 5439
KManager version 3.3.1.0
purchased in 2008 ClubRSX
Race header/ 2.5 exhaust/ RBC intake with ram air/ RDX 410 inj./ deatchwerks 265 lph pump

Over the last year and a half i have noticed my car not pulling through the RPM range like it used to.
I have gone through some datalogs and replaced some parts along the way and no results.
I have replaced both oxygen sensors, MAP, plugs, and most recently pump and injectors.

I originally thought there was a problem when my car would struggle to rev past 7,500 RPM. It has gotten worse since then. Now it has no power past 6,500, and really struggles at 6,000 to even get to there.

I noticed the cycle duty maxing out at 50% about a year ago and it has been going down further since. It now will only go to 25-30% at WOT. I hoped that a new pump and injectors would solve the problem, but it wasn't the case.

Any help would be greatly appreciated.

Re: Loss of power at 6,000 RPM

Posted: Sat Apr 05, 2014 5:31 pm
by Hondata
Was that a full throttle run? The TPS is only 38% and the MAP around 60 kPa.

Re: Loss of power at 6,000 RPM

Posted: Mon Apr 07, 2014 11:43 am
by mndc5
Hondata wrote:Was that a full throttle run? The TPS is only 38% and the MAP around 60 kPa.
yeah. i had it floored.

Re: Loss of power at 6,000 RPM

Posted: Mon Apr 07, 2014 12:05 pm
by mndc5
i just did some reading with TPS calibrations and scaling.
If this is the problem, what is the best solution.
New TPS or just calabrating.

Re: Loss of power at 6,000 RPM

Posted: Mon Apr 07, 2014 12:46 pm
by Spunkster
First try calibrating it.

Re: Loss of power at 6,000 RPM

Posted: Mon Apr 07, 2014 1:38 pm
by Hondata
If the MAP is 60 kPa then the throttle is not opening. With the engine off get someone to floor the throttle and check the throttle body.

Re: Loss of power at 6,000 RPM

Posted: Sun Apr 13, 2014 10:57 pm
by mndc5
here are some TPS tests. they seem alright.
i will have someone do it while i look at the TB.
thanks for the helps.