Help me Pass Emissions!

[godsmack]

I'm wondering why everyone is saying vacuum leaks when HC's are high?

Of course check those but he's getting too much fuel in there or not enough spark. Vacuum leak will cause a lean condition not a rich one.

What is a pair valve?

[S14DB]

Originally Posted by godsmack

I'm wondering why everyone is saying vacuum leaks when HC's are high?

Of course check those but he's getting too much fuel in there or not enough spark. Vacuum leak will cause a lean condition not a rich one.

You can get a lean misfire condition where the engine is to lean to fully burn or even ignite also.

Originally Posted by godsmack

What is a pair valve?

AIV