dcpwhit

Changed left cam sprocket and crank sprocket. They were both a little rusty.

Went for a drive and got a P0302. No P0301. Hurray for progress?

Might try and get an oscilloscope. Unless anyone else has any ideas?

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I'll look into the crank sensor teeth. What am I looking for?

I do have access to an oscilloscope. Will have to look into that this week.

Currently going to replace his camshaft gear. It's slightly rusted.

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This is NOT a Legacy, this is a question a out my friends Impreza. I own a Legacy and have been lurking in this forum for years. You guys are fantastic and never lead me wrong. Hoping you guys are willing to help.

My friend let the original ej253 die in his 2006 Impreza. He bought a JDM ej253 to replace it. Install went easy enough. At high rpm (5000+) the car throws P0302 and P0301 and goes into gimp mode.

We've tried everything random thing we can think of-

Changed Spark plugs/wires

Changed coil pack

Changed cam angle sensor

Changed crankshaft sensor

Changed fuel pump

Changed VVT valves

Cleaned MAF sensor

Used 2 bottles of sea foam to clear the carbon build up. Cylinder 2 had the most.

Valve cover gasket

Adjusted valves

Checked for vacuum leaks

Replaced PCV Valve

Replaced O2 sensors (pre/post cat)

Compression test results-

C1: 155

C2: 170

C3: 160

C4: 155

Originally had the USD wiring harness, switched to the JDM harness.

Still throwing codes! And I've exhausted my idea bank. Is there something I'm missing?

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