4.2 258 makes 'fluttering' noise as I let off throttle?? - JeepForum.com
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Unread 09-29-2012, 02:43 AM   #1
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1988 YJ Wrangler 
Join Date: Aug 2012
Location: Flagstaff, Arizona
Posts: 1
4.2 258 makes 'fluttering' noise as I let off throttle??

I have a 4.2 258 on an 88 YJ. It's stock with most emissions taken off. I've nuttered it and removed the EGR valve then capped it. It has a Weber 32/36 DGEV. I've played with the timing by ear (have no timing light yet) and adjusted the carburetor quite a few times. As I'm letting off the gas it makes a noise, almost like lifters but not really sure what is going on. I'm sure I don't have the timing right but did change the distributor vacuum to a ported line - it was on manifold vacuum. I'm thinking of changing to a Carter 4057 fuel pump thinking fuel pressure is problem for the Weber. Any ideas or help would be appreciated.

MountainmanPaul is offline   Reply With Quote Quick reply to this message

fuel pressure , fuel pump , lifters , timing , weber carburator

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