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Engine Management and ECU Remapping This section is to discuss the various aspects of engine management modification for your Subaru.

Miss fire

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Old 28 December 2013, 01:57 PM
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Stidara
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Default Miss fire

Just done my head gaskets and clutch and now it's coming up with Miss fire cylinder 2 and 4 , changed the plugs but it's still the same , it's a 2003 blob sti type uk any ideas ??
Old 28 December 2013, 04:43 PM
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swaynie
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You done a compression test
Old 28 December 2013, 07:31 PM
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Stidara
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Just had the heads skimmed and pressure tested and fitted new head gaskets so can't see it being that
Old 29 December 2013, 10:20 AM
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Stidara
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Swapped the cool packs from side to side and still the same
Old 29 December 2013, 11:18 AM
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RICHARD J
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Do a compression test before you waste any more time on it.
Old 29 December 2013, 12:15 PM
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Stidara
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What should it read ?
Old 29 December 2013, 01:05 PM
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Bob99
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Compression (Hot engine, 350 rpm and fully open throttle)

Standard
981 — 1,177 kPa (10 — 12 kgf/cm2, 142 — 171 psi)

Limit
882 kPa (9.0 kgf/cm2, 128 psi)

Difference between cylinders
Less than 49 kPa (0.5 kgf/cm2, 7 psi)
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