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Old 08-07-2017, 08:28 PM
SteveH SteveH is offline
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Default Using E85 to pass emissions

A buddy of mine in Idaho called me for advice. He was trying to get an '82 F150 (straight 6, carb) to pass emissions. Failed CO, but ok on HC. I told him to check the air pump, and to run down the fuel tank and add 4-5 gallons of E-85 and re-test. He did this, and it passed by a fairly wide margin.

The best part he saved for last - the air pump had been removed by the PO and the lines capped off. Obviously, the E-85 provided enough oxygen to get the emissions down.

This has to be the most extreme case I have heard of, but reinforces what I have seen in other cases.
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Old 08-07-2017, 08:36 PM
SteveH SteveH is offline
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The actual test sheets - look at 2500 RPM test.
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Old 08-07-2017, 10:11 PM
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nakman nakman is offline
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CO went down a lot also, that is interesting.
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Old 08-08-2017, 05:18 AM
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MDH33 MDH33 is offline
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My old FJ60 with a tired air pump used to burn a lot of oil and wouldn't pass, but the E85 trick worked for me too. Eventually the CAT wore out and then it failed consistently.
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