Bad intake gasket
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New User
Joined: Mar 2004
Posts: 8
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Bad intake gasket
Bought a fine 84 300ci manual 3 speed last week and it had a bad miss under load. After reading several hundred posts on this board and trying the low dollar things first ( plus and wires ), I found a bad intake manifold gasket with the help of some starting fluid. I removed the cats, air pump and some corroded device mounted below the pump. Replaced the gasket and ran exhaust through a used stock muffler I had laying in the garage. I also disconnected some wires that were plugged into the feedback carb. Runs like a new truck. Thanks for all the help I got from the many posts.
One question? Are the elctrical connections on this feedback carb necessary? What do they do? Fuel efficiency? Any insight would be helpful. Still have MAP sensor for timing, it wouldn't run right without that.
Again thanks for all the knowledge....MK
One question? Are the elctrical connections on this feedback carb necessary? What do they do? Fuel efficiency? Any insight would be helpful. Still have MAP sensor for timing, it wouldn't run right without that.
Again thanks for all the knowledge....MK
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
The electrical connectors are for the mixture solenoid and idle speed control motor on the carb. The mixture solenoid defaults to rich when it's unplugged, so you may have slightly lower economy, but you'll have to see what happens there. My truck ran like crap when I tried unplugging the idle speed control motor, but if yours runs fine that way, you're not hurting anything.
