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e34 520 m20 b20 poor performance
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<blockquote data-quote="bmw4eva" data-source="post: 304678" data-attributes="member: 14423"><p>Could be several possibilities:</p><p></p><p>1.Intake air leak(usually the car backfires when you hit on the throttle if this is the problem)</p><p></p><p>2.Did you change the timing belt too? Because incorrect camshaft timing could also be the culprit</p><p></p><p>3.Check cylinder compression.If they're low, maybe head gasket blown or piston rings shot.</p><p></p><p>4.Air mass sensor improperly adjusted.(the M20 should have the flapper type AMS which is adjustable).</p><p></p><p>5.This is unlikely, but check the boots(air filter box-to-AMS and AMS-to-throttle body) to see if a wad of newspaper isn't shoved inside, blocking the airflow to the engine.I know this because its happened to my old Porsche 928 before when I had the timing belt changed(probably the mechanic's idea of a joke) and the power was effectively cut in half.</p><p></p><p>Hope that helps.</p></blockquote><p></p>
[QUOTE="bmw4eva, post: 304678, member: 14423"] Could be several possibilities: 1.Intake air leak(usually the car backfires when you hit on the throttle if this is the problem) 2.Did you change the timing belt too? Because incorrect camshaft timing could also be the culprit 3.Check cylinder compression.If they're low, maybe head gasket blown or piston rings shot. 4.Air mass sensor improperly adjusted.(the M20 should have the flapper type AMS which is adjustable). 5.This is unlikely, but check the boots(air filter box-to-AMS and AMS-to-throttle body) to see if a wad of newspaper isn't shoved inside, blocking the airflow to the engine.I know this because its happened to my old Porsche 928 before when I had the timing belt changed(probably the mechanic's idea of a joke) and the power was effectively cut in half. Hope that helps. [/QUOTE]
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e34 520 m20 b20 poor performance
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