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Old 12-10-2013, 10:16 AM   #1
giorgiotersen
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Problem in startup

Hello to everybody i am George from Greece i have small problem and i want share it with you and maybe you can help me.

My Ford focus 2001 benzine 1.4 zetec-s. I change engine two months ago it was zetec-se and now is zetec-s, its work perfect but the problem i had on my old engine(zetec-se) remain in the new engine.
The problem is when i turn my key to start up, for seconds i hear sound like soft explosion (paffff) from the front of engine is not appear every time but 2 times in the week, its appear only when i start the engine and many times in the cold engine. one time happen when i start up i hear that sound and i see a white smoke coming from the front. after that the engine take start and works perfect and nothing suspicious i cant see and hear. i dont know what it is but i have my air-con fault, my battery i think is ok and dynamo is ok. i change a week ago ignition coil so its works very good and fast without misfires. If anybody had the same problems or same sound please send me message.


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Old 12-10-2013, 10:20 AM   #2
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Are you giving it gas when you start it up? Back fire thru the thottle body perhaps? Do you have a sri or a cai intake?
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Old 12-10-2013, 10:37 AM   #3
giorgiotersen
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no i never give gas at start up. i have original intake manifold is cai intake i think i dont change anything is all mother industry. is possible backfire in intake manifold? its dangerous yes? if is backfire how can i fix it?
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Old 12-11-2013, 06:00 PM   #4
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Moved to "General Technical Chat".
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