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Misfire

achillies
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achillies Member

achillies

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Posted

Hi all....I have a 2000 996 w/6speed. Over the weekend in order to replace a vacuum hose I removed the TB, Alt, and Oil Fill tube. Now it has a erratic idle with a misfire. I cycled the DME twice but no better. The Durametric is showing P0300, 0301 and 0304 which are misfires. As I read the manual it appears that the TB crosstube needs to have arrows lined up? Could this cause a misfire? Is a misfire caused by a leak somewhere? Any direction to look would be helpful as it appears that everything is reattached correctly. Thanks in advance.

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Loren Member

Loren

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Ok..I will replace the coil packs. But I see 3 numbers possible.

99760210700

99760210400

99660210101

I have a 2000 996.

Do I order the 996 part number or 997 part number?

Thanks

You do not need to replace any coil packs that are not cracked or pass the resistance test.

A good coil should read: Resistance between terminal 1 and terminal 15 at 20°C: 0.3 - 0.7 ohms

Obviously a higher (or lower) resistance is a bad coil.

The (current) correct coil pack for your car is: 997.602.107.00

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