bucking at high rpm

2011 SUBARU WRX
63,000 MILES • 2.5L • 4 CYL • TURBO • AWD • MANUAL
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JORELK
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having an issue at approximately 3500 rpm under acceleration where the car will buck and flash the CEL however record no code. if held at this approximate rpm the tachometer will bounce between 3500 and 6000 rpm. I have had the spark plugs, coil packs, injectors and fuel pump all replaced with no avail. The shop seems to think it is the camshaft position sensor, is this the case?
Mar 22, 2016 at 10:28 AM
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HMAC300
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  • 48,601 POSTS
we can't tell you but have the shop freeze frame it with a scanner and read voltages one may be low or out of range. then maybe check for a vacuum leak
Mar 22, 2016 at 1:08 PM