Running rich and high!

Locosaint · 06-27-2005, 01:56 AM

1989 302 HO just put her back toghether after full rebuild, all new parts on bottom end. She runs great but runs really rich. i put new oxygen sensors, brand new ignition system, new injectors (19#). i just put a new idle control valve on and it idles at about 1800 rpm cant get it to idle lower with the valve connected. timing is 12 degrees. I am guessing it is a vacuum problem but i cannot find a leak. Anybody have a vacuum diagram other than the unreadable ones that come on the fan shroud? It is possibly a bad computer as i am unable to pull codes???(havent figured that one yet). Any ideas?

Capri306 · 06-27-2005, 10:36 PM

If it's leaking THAT bad, it's gonna be a HUGE vacuum leak. Check the PCV and canister purge lines...you know, the ones up underneath the upper manifold? The ones God would have a problem getting to?

06-27-2005, 01:56 AM	#1
Locosaint Work In Progress Join Date: Feb 2005 Location: Sarasota, Fl Posts: 1	Running rich and high! 1989 302 HO just put her back toghether after full rebuild, all new parts on bottom end. She runs great but runs really rich. i put new oxygen sensors, brand new ignition system, new injectors (19#). i just put a new idle control valve on and it idles at about 1800 rpm cant get it to idle lower with the valve connected. timing is 12 degrees. I am guessing it is a vacuum problem but i cannot find a leak. Anybody have a vacuum diagram other than the unreadable ones that come on the fan shroud? It is possibly a bad computer as i am unable to pull codes???(havent figured that one yet). Any ideas?

06-27-2005, 10:36 PM	#2
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Re: Running rich and high! If it's leaking THAT bad, it's gonna be a HUGE vacuum leak. Check the PCV and canister purge lines...you know, the ones up underneath the upper manifold? The ones God would have a problem getting to? __________________ Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco

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