94 502mag efi
08-30-2007 | 08:34 AM
#2
Charter Member
Joined: Jan 2001
Posts: 7,663
Likes: 2
From: Edgerock Baby!!
What is your fuel pressure and have you scanned for codes??
08-30-2007 | 08:24 PM
#3
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Joined: Oct 2000
Posts: 543
Likes: 0
From: Sussex, WI
its your vst tank, the diapraghm in it probably has pin holes in it and your dumping raw gas into the #7 or 8 cylinders, don't remember which one. When the diapraghm goes bad there is a hose that is routed to the the cylinder and all the excess fuel dumps into it. Do a search on vst tanks and you'll find plenty of info on it.
08-31-2007 | 07:32 AM
#4
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Joined: Jan 2001
Posts: 1,070
Likes: 1
From: Baton Rouge, LA
Ditto x2
its your vst tank, the diapraghm in it probably has pin holes in it and your dumping raw gas into the #7 or 8 cylinders, don't remember which one. When the diapraghm goes bad there is a hose that is routed to the the cylinder and all the excess fuel dumps into it. Do a search on vst tanks and you'll find plenty of info on it.
08-31-2007 | 08:58 AM
#5
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Joined: Dec 2000
Posts: 194
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From: Paducah, KY
Thanks for the help and suggestions concerning this efi issue. Please keep the info coming. I will be helping torian trouble shoot this. We should probably add that the excessive rich condition appears to be from both banks of cylinders and that this boat has been sitting with VERY LITTLE use for past few years.
