1990 Ford F250 High CO

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Posted to Emissions Forum on 9/23/2003 11 Replies

Hi EmF,

I need some advice and feedback on this CO failure. CO will be around 2% to 3% under load. CO will be around 2% at 2500 rpm no load. Here's how the AIR system appears to me.

[1990 Ford Pickup F250, N/A Drawing]

If I block the pipe going to the fr... Login to read more.

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