I have a 1982 F-250 5.8 with a Holley Carb. list no. 80179. It also has the numbers 3499 stamped on the air horn. There is not a lot of information about this carberator online, but it seems to be a discontinued model and a replacement for the varible venturi carburetor. About a week ago it started dripping gas from the accelator pump and I figured it was time for a rebuild or for a new carberator. I opted for the rebuild in order to save money (and to ensure that I did not buy the wrong carb.!) I had some trouble with my rebuild, but thanks to this forum and others I got some of my problems solved (fuel was spraying out of the bowl vents- a needle issue it seems). The problem I am having now is that the truck has a higher idle and I can't turn it down. I did adjust the idle screw on the carb. After much trial and error, it seems to me as if my throttle cable is either out of adjustment or in need of replacement. I doesn't seem to be binding on anything. Can the throttle/accelerator cable be adjusted? Am I on the right track?
It will idle with or without the ball connected, but it has a lower idle when connected. It won't return to idle when disconnected. It is almost like something is binding, but I do not see where it would be binding. I took the carburetor off yesterday and it doesn't seem to bind at all when it is off of the engine.
I am not 100% sure about the springs, but I removed the spring that is almost directly below the throttle cable connection. The idle was through the roof with it in place, but it was, when connected, exactly where it was before I began the project.
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On Jul 2, 2019, at 9:04 PM, ArdWrknTrk [via Bullnose Enthusiasts] <[hidden email]> wrote:
It will idle with or without the ball connected, but it has a lower idle when connected. It won't return to idle when disconnected.
That's very weird, and sounds like it could be another symptom of your problem.
Are you sure you got the springs back in the right place when you reassembled it?
Lil'Red is a '87 F250, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with an Edelbrock 1826 and Performer intake.
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So, I checked for vacuum leaks with carb cleaner. I did notice some varation in idle when I sprayed on the choke side of the carburetor, but I can't see where it would be leaking from. The only thing I can think of is the wedge and gasket. Should there be a gasket on both sides of the wedge? My kit only came with one. Would this effect my idle?
Ok, one concern I have after reading this, since that carburetor is a replacement for the VV carburetor, it should be a new enough design to have a return spring on the throttle shaft, it will be what is called a torsion spring, meaning it is a "twisting" style like a clothespin spring. The spacer or as you called it wedge, probably had an EGR valve on it, if it did and is aluminum those are known to burn through from the exhaust gases.
You say that with the cable disconnected the throttle wants to stick, does it do it with the carburetor off the engine? If not, then something in the "stack" (plate to manifold, plate and plate to carburetor) is not flat. One item I have run into many times, the carburetor mounting gasket (top one under the carburetor) is usually a thick insulating gasket, many of the aftermarket ones in rebuild kits lack the hard spacers around the bolts which are put there so the gasket will only compress enough to seal, without them the corners will compress too far resulting in the throttle body warping and binding the throttle shaft.
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Gary- Yes, I am referring to the spacer (9A589). It did not look great when I pulled off the carburetor and it clearly had a gasket on both sides. However, since my kit only came with one gasket, I was hoping for the best. I can't say that I am surprised that this is an issue.
Bill- the carb. does indeed have a tension spring and it woks fine off the engine. This has been the place where I have really been stuck. I took the carburetor off the engine twice trying to figure this out- it had not occured to me that something so seemingly subtle could make it 'bind' as it were. The gasket is fine, it has four corners, but the spacer could be an issue as to why it isn't laying down flat.
Thanks, gentlemen, I will be away this week, but I am going to order a new spacer and gasket and give it another shot next weekend.