Doug,
Could be the accelerator pump, but here's an article that discusses
how the idle adjustment being off can cause 'puddling' which is a
temporary rich condition caused by idling. It bogs briefly until the
extra gas gets sucked out.
http://www.thecarburetorshop.com/Troubleshooting.htm
- Jim
Jim Altemose, Long Island, NY
'63 Polara 500 (Max Wedge)
'63 Polara 500 (383)
'65 Belvedere I (Street Wedge)
'71 Bronco
On Wed, Aug 1, 2012 at 10:07 PM, Doug J <63sprtfury@xxxxxxxxx> wrote:
> Hey all,
> This summer my car has been kind of hesitating from take-off, not real bad,
> just kinda flat for the first bit, then ran fine. Last Friday night at our
> local cruise, it started hesitating quite a bit more, and not wanting to
> idle at stops while in gear. Took it out on the highway to "clean it out" a
> bit and it acted like it was at half throttle at best. So, tonight I
> changed the fuel filter, it was bad, and took it out for a ride. Ran pretty
> good at first, but after a while, the rough idle was back and so was the
> hesitation. Increased the idle speed a bit, and the accelerator pump stroke
> as well. Same. Also, if you rev it up a bit in neutral, it takes a minute
> or so for the RPMs to go down to idle speed. Linkage is not sticking, as
> even holding the throttle lever closed doesn't make it slow down any faster,
> you just have to wait for it. At say 1500 rpm in low, you can hammer it and
> it responds nicely. It will also downshift and accelerate fine when floor
> boarded. Seems to just be low rpm related.
> Only change I have made to it was putting on a Mopar electronic ignition
> system. Starts wonderfully with it btw. It is not a kit, but all parts I
> found in my "stash". Distributor and control box are very low mileage
> though, I'd say 1000 miles or so, although they are probably 20 years old.
> Also, I haven't done any "tuning" to the igition yet, due to the rough
> running which I have been thinking was all carb probs, so it's only at 5
> degree advanced at this point.
> Here's the particulars
> 68 383 HP, stock except for "Purple Shaft" cam
> Edelbrock 800 AVS (5 or 6 years old)
> Dual exhaust off manifolds
> Mopar electronic ignition with orange box
> Automatic with stock convertor
> Fresh premium gas
>
> Any thoughts? Always put stabil in the gas for storage, but carb might be
> getting gunky inside? Could ignition timing be part of it?
>
>
> --
> Doug,
> '63 Sport Fury 'vert
>
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