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#1
09-15-2004, 02:05 PM
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1994 Suburban fule consumption
I have a 1994 GMMC suburban 4X4 with a 5.7 l (350 ) v8 engine, I had to replace the engine because of a broken rist pin. Ever since the rebuilt engine has been installed it has been a real Gas consumer. Recently I pulled a boat for several hours, I noticed a great deal of unburned fuel residue on the hull of the boat. The catalic converter is running very hot. I am wondering if my bad fule consumption is the result of the fuel not being properly burned. The rebuilt engine has never performed like the old engine, Idles rough. I have replaced the "Throtle Position Sensor" and the "Anti Knock Sensor" I have tough of replacing the TBI, but I don't just want to keep shooting in the dark!! Does anyone have any ideas what is going on????
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#2
09-17-2004, 12:39 PM
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Have you checked/changed the O2 sensor?
Check your charging system too. Too weak of a charging system will give your engine a weak spark, and leave much unburnt fuel to burn off in the cat, which is dangerous. I wouldn't do anymore towing, and as little driving with your rig until you can get this worked out. Best of Luck!
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93 Suburban 2500 203,000 miles on engine still running like a champ! Tranny rebuilt at 197,000 My Daughter calls it the bus, and sits in the third row seat praying for potholes and speedbumps!  Just Horsin' Around Equine Services http://www.JHA-Trans.com
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