Jan 18 2010

Ford emissions melt down

Published by bqdayrr at 4:55 pm under Articles, Auto Repair

I have a 1989 f250 5.8 the hose that hooks to the check valve blew out and where the deverter is connected it melted and the connection came off and hot air from it melted the top of the oil cap am I right in thinking the check valve is clogged and where can I find a diagram of the California emissions system for 1989 f250 5.8

Response:

I’m guessing you are referring to the PCV valve that plugs into a grommet on the valve cover.  This is a 2 buck item, but if you shake it and hear a rattle, it’s working.  Just replace the melted stuff, and connect it back together.  As for the CA stuff, Google works for me.  Or the dealer should have a copy of it.
 check valve allows air or liquid to pass in one direction only.  Remove it, blow in both ends.  If you can blow thru it from both ends it’s bad, if you can’t blow thru it from either end it’s bad.  If you can blow thru it in only one direction, it’s good.  As far as the second valve, don’t know what it is. 

Maybe he is talking about the EGR valve. Vacuum controlled valve to allow exhaust gas to enter the intake.
The diagram of the emissions control system should be under the hood on a sticker. A dealer can supply a new sticker or photocopy from their manual.

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