mtnman38 Posted April 13, 2005 Share Posted April 13, 2005 HEY ALL, Ok so heere is my new problem 86 4wd wagon carbed (NOT EFI) 5speed D/R She runs but really rough, plugs wires, air filter, cap, rotor, and fuel filter new Timing set @ 8 degrees BTDC feels like vacume leak but cant find one So you get in fire it up and she runs but motor bouncing around in compartment after it warms up it smooths out Then you get in and drive and you romp on the throttle and it just goes blah for a few seconds then it slowly picks up speed until it oens up @ 2200 rpms back fires when shifting soooo? The only thing that i have found that remedes this is I put the timing @ 20 degrees BTDC and it still has a dead spot but runs 10 times better but still back fires while shifting Plus I really dont think that it should be timed this far out Any Ideas Thanks LT Quote Link to comment Share on other sites More sharing options...
85Sub4WD Posted April 13, 2005 Share Posted April 13, 2005 sounds like a bad carb - had similar problems on mine several times I would try running Seafoam (what many others have done with sucess), Techron additive, and/or Marvel Mystery oil (in specified amount) through the fuel system to see if that cleans it up also double-check the 1000 vacuum hoses for leaks - carb issues and vacuum leaks are what precipitated my change to SPFI Quote Link to comment Share on other sites More sharing options...
heep70 Posted April 16, 2005 Share Posted April 16, 2005 LT, Check the vac can on the disty. Sounds like a blown diaphragm. Let me know Quote Link to comment Share on other sites More sharing options...
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