84 F350 460 Auto 4x4

Im in the market for a new carb and I hate to start a new thread but I actually did search and read a ton of old threads. Anyway, yes I know I could rebuild what I have but I’d rather start fresh with maybe something different. As some of you know this is new to me. I know very little to nothing about carbs and I’m learning as I go with working on my truck. I’m looking for simplicity and reliability. I’m not looking to tinker a lot.

 

I like these. It's what I am familiar with and works well. Needs a little adjustment at the beginning, and some adaptation, but all aftermarket carbs do.

https://www.holley.com/products/fuel...parts/0-1850SA

 

I would suggest the Edelbrock Thunder AVS carburetor. IMHO, Edelbrock carburetors are more streetable than Holleys. Of course, you'll get a hundred different opinions. Let us know what you get.

https://www.edelbrock.com/thunder-se...-egr-1826.html

 

I just put an Edelbrock AVS on my engine and it runs great (1806 not the new AVS2). If you already have an Edelbrock on the truck, adaption has already been done. I had some adaption to do because I converted from 2 bbl. and that part was a PITA but all is good now.

 

I went with another edelbrock... as the last posters said all the adaption had already been done. I literally had the new one in and running within 40 minutes. I didn't get a chance to drive it b/c I need to tidy up some fuel lines but I got it tuned up and it's amazing how much better the truck sounds. Much quieter and idling with ease. Can't wait to drive it.

 

How did you get it so fast is Summit Racing just down the street from you or an old speed shop that had one in stock?
Dave ----

 

Yeah there are about 5 different autozones, Napa’s, and advance within 8 miles of my house. Yes, they had one in stock. Amazing difference. Drove it about 30 miles today. Loaded up and went to dump and then got a load of mulch on the way home. Feels like a new truck.

 

Glad you are pleased with yours as I am with mine.

Did you get your pressure regulator sorted out?

 

Yeah I threw a new one on there. I think that was playing a small part but overall it’s unreal the difference the new carb made. This is my first carbed vehicle and despite owning this truck for 5 years I had no idea it could be this quiet and smooth.

 

And this is why proper diagnostic procedures need to be followed with these vehicles. You are dealing with a dumb mechanical system that won't self diagnose. And you have to execute methodical step by step diag procedures. You likely threw a bunch of stuff at the truck that did not need to be replaced. Not only is it wasteful in both time money and resources you don't really learn anything other than component R&R.
Unfortunately, there are a lot of people on the board that advocate part swapping instead of methodical diagnostics.

With your truck, the fact that one venturi did not have an adjustment on the idle mix is an almost sure-fire indication of carb failure, but there is the possibility it was due to a severe one bank vacuum leak. the only things that can cause that are a failed vacuum accessory or a failed intake gasket and that would show up one or more spark plugs. Since you had changed the plugs this diag would no longer be a valid check.
Capping off the brake booster, (the only item that could leak enough to negate any idle mix adjustment) was ruled out. Leaving the most likely suspect, the carb, and since you were not complaining of excessive oil consumption a failed intake gasket was not a likely scenario anyway.

When you get advised that this item has failed, the next question should be how can I test it to verify it had failed this even applies to EFI vehicles as it can save you from replacing expensive and usually non returnable components, otherwise, you could just end up chasing your tail and spending time and money throwing parts at it in the hope that you get a ringer, and not actually learn anything other than component R&R.

A properly tuned and adjusted carb will run as well as EFI, a carb can start almost as good as EFI, and in certain situations a carb'd vehicle can start even better than most EFI systems.

 

My Edelbrock AVS is certainly proof of your statement on how fast a carb'd engine can start. From cold it is one pump of the peddle, turn the key and it is running. On a warm engine the drill is turn the key and touch the peddle o-so-lightly and it is running.

 

I certainly learned a lot through this process. Thank you for your help.