Rough Idle 1999 Impreza GC8 EJ201
16 November 2020, 07:02 PM
#1
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Rough Idle 1999 Impreza GC8 EJ201
Hi everybody, I have 1999 Subaru Impreza EJ201 non turbo, she was making ticking noise so I decided to adjust valve clearences. After valve adjustment, performance increased but engine runs very rough when idle, no matter when engine is hot or cold. After that I rechecked valve clearences, if it is in right position to TDC, everything semems good. Then I tried to clean IAC sensor, check spark plug cables, changing spark plugs, reset ECU but nothing helps. I canīt access ECU via OBD2, so donīt know about any errors. What could cause this trouble? Thanks for help.
16 November 2020, 07:49 PM
#5
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Why? I checked TDC by inserting stick into the cylinder and when I turn crankshaft I feel when piston is in TDC. I use arrows just to know which cylinder I am setting. This is bad?
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16 November 2020, 08:07 PM
#9
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I see, this will be rough.
Maybe little video would help?
Check out here I uploaded engine running. https://drive.google.com/file/d/1FyB...ew?usp=sharing
Maybe little video would help?
Check out here I uploaded engine running. https://drive.google.com/file/d/1FyB...ew?usp=sharing
28 November 2020, 11:19 AM
#10
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Problem solved!
Timing belt jumped on left camshaft wheel by 2-3 teeth. This was causing rough running. Timing belt was removed, wheel alligned and now engine runs like new, nice and smooth!
Timing belt jumped on left camshaft wheel by 2-3 teeth. This was causing rough running. Timing belt was removed, wheel alligned and now engine runs like new, nice and smooth!
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