rough running 302
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Freshman User
Joined: Aug 2001
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rough running 302
hey guys need hep badly .I replaced the accelerator pump diaphram on this 84 ford 302 w/motorcraft carb 2bbl.Now the engine is running so rough I can't drive it .I did adjust idle mixture screws .Tried adjusting again but nothing helps .F**&&ing thing sucks I need this van for work.It was running just fine before I put this accelerator pump on .Please help need input...RJLB....
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From: Southern California
rough running 302
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horsepuller, volunteer moderator
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horsepuller, volunteer moderator
Posting Guru
Joined: Sep 1999
Posts: 2,297
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From: Indiana
rough running 302
RJLB, What kind of problem led to you putting an accelerator pump on the van? What kind of dissasembly did you do here? Did you just pull the cover from the front of the carburetor? Give a little more info on what was going on and we'll see if we can help.
Superdave
94 Ford Aerostar XL 3.0L
82 Ford F250 4x4 XLT,400 CID,C-6 A/T,8700lb GVWR. Black & Silver
Superdave
94 Ford Aerostar XL 3.0L
82 Ford F250 4x4 XLT,400 CID,C-6 A/T,8700lb GVWR. Black & Silver
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Freshman User
Joined: Aug 2001
Posts: 26
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rough running 302
Sorry for the language I appoligize for that.I replaced the accelerator pump because it was leaking at the diaphram.There was fuel on the piston that works in and out.I found a small pin hole in that diaphram.Also replaced fuel filter while I was in there.Thks RJLB.......
Posting Guru
Joined: Sep 1999
Posts: 2,297
Likes: 1
From: Indiana
rough running 302
Did you change the setting on the pump arm for the accelerator pump? Does it just idle bad or does it smooth out after you gas it? If it does not run good on either idle or acceleration I would recommend you pull the carburetor and check it out. Pull the upper body off, remove the float and look to see if anything is plugging the jets. Did you change the elastomer valve in the front of the carb main body (lays right behind the accelerator pump diaphram)? You may want to just take it all apart and clean it, then blow out all orifices and put a rebuild kit in it.
Superdave
94 Ford Aerostar XL 3.0L
82 Ford F250 4x4 XLT,400 CID,C-6 A/T,8700lb GVWR. Black & Silver
Superdave
94 Ford Aerostar XL 3.0L
82 Ford F250 4x4 XLT,400 CID,C-6 A/T,8700lb GVWR. Black & Silver
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