Cuts Power after reaching 5000 RPM.

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Thread: Cuts Power after reaching 5000 RPM.

  1. #1

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    Cuts Power after reaching 5000 RPM.

    Hi,
    C20let with management,
    EDS 3.5
    Boost 1.4 with HP estimated 350-380
    Turbo stage 3 K29
    Intercooler and pipe work EDS
    Spark plugs Bosch F5DPOR
    The engine cuts power as it reaches 5000RPM.
    Thanks.

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  3. #2
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    Re: Cuts Power after reaching 5000 RPM.

    I guess you could give less information...

    has it just happened or has it developed over time, perhaps initially at higher rpm?
    Does it happen at around the same rpm under light throttle through to full throttle?
    Does it have a hard limit or lose power over a few hundred rpm?
    Is there a misfire and, if so, is it a sharp crack or a more muffled pop?
    Have you pulled the spark plugs and is one, or more, different from the others?
    Etc - the more information you can give the better.
    NOTE, these are my thoughts and opinions, sometimes I'm wrong ;-)

  4. #3

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    Re: Cuts Power after reaching 5000 RPM.

    the first start of the day is like the Instant Consumption starts from 3.3 L/Hr and comes to 1.4 L/Hr and AFR from 10 rich goes to 14.5 in about 10min before that you cannot leave till the AFR is 14+ then while staying on the spot if I push the throttle it cuts at around 5000rpm, when I start to move my car at full throttle as the boost reaches 1.2bar and rpm at around 5000 it loses power as if I am switching off the engine but when I remove my foot from throttle the car gains power again at small boost and low rpm and many few times at full throttle it cuts even before 1,2 bar boost.
    Quote Originally Posted by Gordo View Post
    I guess you could give less information...

    has it just happened or has it developed over time, perhaps initially at higher rpm?
    Does it happen at around the same rpm under light throttle through to full throttle?
    Does it have a hard limit or lose power over a few hundred rpm?
    Is there a misfire and, if so, is it a sharp crack or a more muffled pop?
    Have you pulled the spark plugs and is one, or more, different from the others?
    Etc - the more information you can give the better.

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  6. #4
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    Re: Cuts Power after reaching 5000 RPM.

    Punctuation, please - that hurts to read.
    IIRC, there is a 5k rpm limit as part of a fail-safe default - are there any error codes?
    The engine will run rich when cold, so that isn't a concern as long as it gets closer to 14/15:1 light load when warm.
    Have you replaced the fuel filter recently, while it is hard to decipher your post, a partially blocked one will cause leaning out and misfiring at higher load and rpm.
    Now, could you please address my earlier questions one by one?
    NOTE, these are my thoughts and opinions, sometimes I'm wrong ;-)

  7. #5

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    Re: Cuts Power after reaching 5000 RPM.

    -It has happened after the car stayed un moved for the time of whole winter around 5 months before this I I didnt noticed this.
    -It happens even if its in Neutral or in any gear just starts after passing 5000rpm.
    -It has a hard limit.
    -No misfire no sounds.
    -No, I havent checked the spark plugs yet.
    Quote Originally Posted by Gordo View Post
    I guess you could give less information...

    has it just happened or has it developed over time, perhaps initially at higher rpm?
    Does it happen at around the same rpm under light throttle through to full throttle?
    Does it have a hard limit or lose power over a few hundred rpm?
    Is there a misfire and, if so, is it a sharp crack or a more muffled pop?
    Have you pulled the spark plugs and is one, or more, different from the others?
    Etc - the more information you can give the better.

  8. #6
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    Re: Cuts Power after reaching 5000 RPM.

    OK, that suggests it is a default rpm limit the ECU is applying because of some error message it is getting. Check for any codes stored in the ECU that may suggest an area to look at - I would suspect something simple like a corroded connection or faulty sender unit will be the culprit.
    NOTE, these are my thoughts and opinions, sometimes I'm wrong ;-)

  9. #7

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    Re: Cuts Power after reaching 5000 RPM.

    me myself I am in doubt that the cable of Crank Sensor might be a problem because i noticed damage(the black plastic covering of cable is melted around 1cm in length because by mistake it touched the hot manifold of turbo caharger but it worked properly since then and now I am facing this problem with rpm limiting ) but I dont know then why its working till 5000rpm and not stops at all and why the Check Engine light is not appearing on dash board.
    Quote Originally Posted by Gordo View Post
    OK, that suggests it is a default rpm limit the ECU is applying because of some error message it is getting. Check for any codes stored in the ECU that may suggest an area to look at - I would suspect something simple like a corroded connection or faulty sender unit will be the culprit.

  10. #8
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    Re: Cuts Power after reaching 5000 RPM.

    Does the light come on when you turn on the ignition - a previous owner could have removed the bulb?
    The weakness of error codes is they show up when the values are outside the expected range - sometimes on or off are acceptable values - but I would have expected a crank pickup problem to be picked up, but that would depend on whether the ECU compared the camshaft/distributor sensor to the crank signal. Could be something else, of course.
    it would be worth checking for an error code, anyway, as some will be stored even if the problem seems to have cleared.
    NOTE, these are my thoughts and opinions, sometimes I'm wrong ;-)

  11. #9
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    Re: Cuts Power after reaching 5000 RPM.

    Have you checked the condition of the distributor and rotor arm?

    if there is a slight misfire then the ECU might be limiting the revs to prevent damage.

    Can you contact EDS directly, as they are still selling the 3.5 phase kit.

    Are you sure you have a genuine chip set and not a copy?
    On the road to improvements. My the Lord of motive power keep us all SANE

    294 BHP 345 LbFt Torque C20let Vectra B, Performance Vauxhall February/March 2016.

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