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08-23-2013, 07:38 AM | #1 |
Scooby Newbie
Member#: 359107
Join Date: Jun 2013
Location: Orono, Maine
Vehicle:2007 Impreza |
2007 Subaru Impreza shaking at startup
Hey guys. I'm trying to figure out what is wrong with my car. Cylinders 2 has been misfiring for a while, but it only seems really noticeable at startup. I've replaced my plugs, wires, coilpack, valve cover gasket, head gasket, and timing belt with no luck. A little bit of white smoke comes out the tailpipe when I first start it up. Could it be a dirty fuel injector? Any opinions are welcomed!
Thanks
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08-23-2013, 10:35 AM | #2 |
Scooby Newbie
Member#: 313989
Join Date: Mar 2012
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sounds like a good place to turn to next. looks like you have knocked out a bunch of the usual suspects, but perhaps with a miss-fire, it could be due to not getting enough fuel?
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08-23-2013, 02:09 PM | #3 |
Scooby Specialist
Member#: 165749
Join Date: Dec 2007
Location: Detroit, MF'er!
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White smoke could be an indication of an internal head gasket leak. You may be able to confirm this with a hot leak down test.
What is the coolant level at? Is the coolant dark in color or does the oil have a light, milky tint to it? |
08-23-2013, 06:22 PM | #4 |
Scooby Newbie
Member#: 359107
Join Date: Jun 2013
Location: Orono, Maine
Vehicle:2007 Impreza |
The coolant level is at the same spot when I had the head gasket replaced a week ago. The coolant looks normal colored. Maybe it's running lean?
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08-23-2013, 08:22 PM | #5 |
Scooby Specialist
Member#: 165749
Join Date: Dec 2007
Location: Detroit, MF'er!
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Yes, that is certainly plausible. You could test the injector theory by swapping injectors with another cylinder and see if that misfire follows the injector. I would use new orings and a light smearing of fuel fitting lube, oring lube, silicone grease or anything that is for fuel systems. Would suck if the old oring rolled or leaked and fooled your diagnosis.
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