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01-21-2013, 10:01 PM | #1 |
Scooby Newbie
Member#: 193719
Join Date: Nov 2008
Location: Colombo, Sri Lanka
Vehicle:1999 Impreza WRX STI Rally Blue |
Sudden Power Loss
While I was driving last week, I felt a sudden power loss. In low and mid RPM's I notice about 25% power loss. The engine Rev's but no power even in first gear and second gear under normal driving conditions. However when I rev the car I can see the boost is reaching to higher levels but power is less. I check the fuel pressure in idle and its 3 bar (No probs with pump). No clutch slip and the clutch is new. The car runs on EMS ECU and MAF sensor is not used. Please let me know your comments.
Thanks in advance
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01-21-2013, 10:32 PM | #2 |
Scooby Specialist
Member#: 316415
Join Date: Apr 2012
Location: Elk Grove, CA
Vehicle:2006 WRX WRB |
Mods list please.
Usually lose of power is the ecu pulling timing due to knock. Can ya get a log? |
01-21-2013, 10:46 PM | #3 |
Scooby Newbie
Member#: 344430
Join Date: Jan 2013
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Are you miss firing in any cylinders?
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01-21-2013, 10:52 PM | #4 |
Scooby Newbie
Member#: 344430
Join Date: Jan 2013
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Hook it up to a code reader
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01-21-2013, 11:11 PM | #5 |
Scooby Newbie
Member#: 193719
Join Date: Nov 2008
Location: Colombo, Sri Lanka
Vehicle:1999 Impreza WRX STI Rally Blue |
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01-21-2013, 11:20 PM | #6 |
Scooby Newbie
Member#: 342331
Join Date: Jan 2013
Location: tehachapi Ca.
Vehicle:2003 wrx blue |
is it making boost ? could be a boost leak ,also ck the timing belt if it jumped a tooth that could do it ,compression ck would hurt either .
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01-21-2013, 11:21 PM | #7 | |
Scooby Newbie
Member#: 193719
Join Date: Nov 2008
Location: Colombo, Sri Lanka
Vehicle:1999 Impreza WRX STI Rally Blue |
Quote:
Mod List EMS ECU 2.5 Catless Down/Mid pipe and Exhaust K&N Filter in Stock Airbox Engine Built - wiseco pistons 93mm / Eagle Rods / Cosworth Bearing Excedy Six spring Sports clutch and plate HKS BOV HKS Sparkplugs B |
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01-21-2013, 11:31 PM | #8 |
Scooby Newbie
Member#: 193719
Join Date: Nov 2008
Location: Colombo, Sri Lanka
Vehicle:1999 Impreza WRX STI Rally Blue |
Yes its making boost but slowly, But my issue is even in very low RPM's (1~2.5) under normal driving conditions its power is less (Ex taking the car out from the gaurage). It feels like clutch plate is gone (But clutch is new and no clutch slip at all). Yeah whould check the compression but I didnt drive the car in high boost for a very long time as I was not well (set to 0.8 bar now for normal driving).
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03-23-2013, 07:29 PM | #9 |
Scooby Newbie
Member#: 79596
Join Date: Jan 2005
Location: Colorado
Vehicle:04 WRX Wagon JBP |
Any resolution to this?
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03-24-2013, 09:23 PM | #10 |
Scooby Newbie
Member#: 193719
Join Date: Nov 2008
Location: Colombo, Sri Lanka
Vehicle:1999 Impreza WRX STI Rally Blue |
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