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2010 R3 powerloss 4500-8000 IDEAS?

Old 07-11-2019, 07:02 PM
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2010 R3 powerloss 4500-8000 IDEAS?

Hi All,
my 65000km 2010 R3 has just suddenly developed a considerable power loss from 4500 up,
no codes
car has no Cat, near full tank of fuel
have BHR coils, and plugs done about 3000ks ago
Idea for cause are
SSV solenoid?
Fuel pump ?
coils?

is there a best way to differentially diagnose between these possibilities?

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Old 07-11-2019, 10:00 PM
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Sounds like your car may be in "limp mode"...perhaps d/t an OMP issue. M/b worthwhile to search it on the forum. Good luck.
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Old 07-12-2019, 07:10 AM
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If it was in limp mode it wouldn't go over 4k or 5k rpm.

The SSV and VDI solenoids can be tested. Remove them, put a MityVac hand pump on the port that connects to the vacuum accumulator (opposite side of the solenoid from the connector). Pull 10 psi vacuum and see if it holds. If it does, apply 12v across the pins and see if the vacuum is vented to atmo.
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Old 07-12-2019, 10:52 AM
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Check your MAF sensor?
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Old 07-14-2019, 08:47 PM
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Originally Posted by t-run/8 View Post
Check your MAF sensor?
cheer,
will do,
seem likel the easiest thing to do
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Old 07-14-2019, 09:18 PM
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Originally Posted by NotAPreppie View Post
If it was in limp mode it wouldn't go over 4k or 5k rpm....
True... somehow misread that...
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Old 07-14-2019, 09:41 PM
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Engine Power Loss
  • chokes as revs increase
    • O2 sensor failure (too rich)
    • MAF failure
    • MAF disconnected
    • e-shaft sensor fouled
    • accessory belt fraying
  • high end power loss (hard fuel cut)
    • Rev limit reached
  • high end power loss (jerky and stumbling)
    • Ignition failure
    • fuel pressure loss
    • e-shaft sensor fouled
  • high end power loss (smooth)
    • Catalytic converter clog
    • air filter clog
  • low end power loss (smooth)
    • Engine compression loss
  • low end power loss (stumbles)
    • Ignition failure
    • front O2 sensor failure
  • revs slowly but smoothly
    • O2 sensor failure (too lean)
    • catalytic converter clog
    • air filter clog
  • sudden power drop at a specific rpm
    • Intake valving actuation problem
  • trouble getting to redline
    • Ignition failure
    • front O2 sensor failure
    • catalytic converter clog
    • air filter clog
    • e-shaft sensor fouled
    • fuel pressure loss
    • MAF failure
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Old 07-15-2019, 02:50 AM
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Still not had time to look at it,
but today it thew a pending P0302 code, on cold start,
started v badly,
but was fine once warmed
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Old 07-17-2019, 06:39 PM
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another bad start yesterday,
still same pending code,
ill change the leading rear coil on weekend,
hope that sorts it
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