Help to identify, please

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Mar 27, 2012 | 04:06 PM

scooterspal

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Tuned

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Help to identify, please

In the engine compartment of my 1999 E-350 there is, what appears to be, a tire fill-up air fitting running along side of the tranny dipstick/fill tube.

Can someone tell me what that is for?

Thanks!

Mar 27, 2012 | 04:21 PM

95e150CW

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From: Outside of Memphis, TN

I'm fairly sure that is the fuel pressure testing port, but i might be wrong. I'll have to peek under the hood of my 06 and see if its there.

Mar 27, 2012 | 08:56 PM

Bbasso

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From: infraction

a schrader valve?
sure it's not for the a/c?

Mar 27, 2012 | 09:19 PM

95e150CW

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From: Outside of Memphis, TN

Its a service port for the AC, mine has a cap and a green tag on it.

Mar 28, 2012 | 08:42 AM

scooterspal

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Are you sure?

AC ports are usually larger and look entirely different than a tire fitting.

Mar 28, 2012 | 11:24 AM

WVVan

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It may be the fuel pressure testing port. You might be interested in this posting of mine.

Mar 28, 2012 | 11:28 AM

klinquist

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Quote:

Originally Posted by scooterspal

Are you sure?

AC ports are usually larger and look entirely different than a tire fitting.

Typically there are two AC ports on vehicles - one larger and one smaller. One is the high pressure side, the other is the low pressure side. The larger one is way bigger than a tire schrader valve, the smaller is about the same size as a tire schrader valve.