When the engine is cold. Car is down on power,

2003 MG ZR
63,000 MILES
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SAM123456789
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When clutch is pressed revs fall and engine stalls. What is wrong? After stalling it restarts but will a little trouble. I have changed the spark plugs and leads. And replaced the idle air control valve. And fuel pressure is fine. But problem still remains. Car is a 2004 53 plate MG ZR 1.4
Mar 12, 2012 at 8:53 AM
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RASMATAZ
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Refer to this link:https://www.2carpros.com/articles/engine-has-low-power-output
Mar 12, 2012 at 10:59 AM
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SAM123456789
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Engine runs really lumpy when cold. But does get better as the engine warms up then runs fine once warm. And only stalls when cold. Have no problems once warm.
Mar 13, 2012 at 3:40 AM
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RASMATAZ
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Test for a vacuum leak

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
Mar 13, 2012 at 5:35 AM