will not idle
Senior User
Joined: Jan 2010
Posts: 285
Likes: 1
I think I'll look at some used carbs to rebuild as suggested. Not sure about the fuel pump. I did have it off of the truck because I couldn't remove the fuel filter canister without a fight. I put a new filter and canister housing on it and a new gasket. Seemed to be pumping okay. Was yours leaking on the inside and you couldn't detect it? So far everything on the outside of the pump looks dry.
Elder User
Joined: Apr 2013
Posts: 640
Likes: 1
From: Buda
Not sure if you still need it but. This is the PDF I used for my 2100 rebuild. I printed it out and still have it in the garage.
http://www.therangerstation.com/tech..._2150_carb.pdf
http://www.therangerstation.com/tech..._2150_carb.pdf
Senior User
Joined: Jan 2010
Posts: 285
Likes: 1
Salty that is the best set! I was going to throw that up this morning too. I printed them out last year on a referral from you and have done 3 carbs with it. Gave a set to my bud here for his 69 too. Small differences here and there but definitely a Bible for 2100 carbs!
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 95
Likes: 1
From: MA
I bought a used Autolite 2100, 1.14 venturi. Seems like a solid core to rebuild. If I'm not mistaken the jets are marked 57's. When I buy the rebuild kit I would like to order the correct jets for my 352 FE. What would be a good jet size to use?
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
What do the plugs look like now? Have to experiment a little bit. What size carburetor was specified in the manual versus what are you using now? Jet size is based on the particular engine/carburetor combo, and elevation. A bit smaller carb may need a bit larger jetting all things being equal. Usually... You should be reasonably safe starting with those jets. The idea is always to start out on the rich side of things and work down not the other way around!
Jets aren't expensive but they aren't giving them away either. Figure $10 a pair. Jump two sizes at a time.
Keep in mind jetting has absolutely nothing to do with idle, the original subject of this post. If you know someone with a selection of jets you could borrow for testing that would be the way to go. If one is picky jetting could take several different pairs and testing to get right. The old school way was to keep jetting down in size until lean surge or misfire was found at steady level cruise, and then jet back up two sizes. An O2 sensor is really the way to go here, takes all the guesswork out.
Jets aren't expensive but they aren't giving them away either. Figure $10 a pair. Jump two sizes at a time.
Keep in mind jetting has absolutely nothing to do with idle, the original subject of this post. If you know someone with a selection of jets you could borrow for testing that would be the way to go. If one is picky jetting could take several different pairs and testing to get right. The old school way was to keep jetting down in size until lean surge or misfire was found at steady level cruise, and then jet back up two sizes. An O2 sensor is really the way to go here, takes all the guesswork out.
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 95
Likes: 1
From: MA
I just ordered the rebuild kit for the carb so when that is all done and back up running I'll take a look at the plugs for a reading. I've seen some recent posts about people using an O2 sensor for jetting/mixture. The sensor would obviously not be like today's cars/trucks with computer controls and such. Is this just installed and metered for testing purposes? What is used to check the sensor output readings?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Yep, an O2 sensor is installed in the exhaust. It's just used for tuning and can be removed, installed in a different vehicle, whatever. They include a portable "gauge" or controller, or a dash gauge can be installed permanently to monitor. They really take a lot of the guesswork out of tuning a carburetor.
Logistics Pro
Joined: Jan 2011
Posts: 4,762
Likes: 54
From: Antelope Valley ,CA
tip on O2 sensor
Mount it as close to exhaust manifold as possible, it has to heat up crazy to work , if you don't have enough heat then you have to buy the more expensive Heated O2 sensor(s) and run 12v to them .
Mount it as close to exhaust manifold as possible, it has to heat up crazy to work , if you don't have enough heat then you have to buy the more expensive Heated O2 sensor(s) and run 12v to them .
Logistics Pro
Joined: Jan 2011
Posts: 4,762
Likes: 54
From: Antelope Valley ,CA
here's the link to my Air fuel ratio install .
some photos are gone thanks to Photobucket (see thread Photobucket)
https://www.ford-trucks.com/forums/1...tio-gauge.html
some photos are gone thanks to Photobucket (see thread Photobucket)
https://www.ford-trucks.com/forums/1...tio-gauge.html
Thread Starter
|
Junior User
Joined: Sep 2016
Posts: 95
Likes: 1
From: MA
I am going to look into getting one when I get the carb rebuilt and installed. Does it have to be TIG welded or can I MIG weld it. I don't have a TIG setup. If it needs to be TIG I can probably remove the pipe after the exhaust manifold and take it to a shop to have it welded.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
The bung can be installed however you want just so long as there aren't any pinholes or leaks. The O2 sensor itself must be powered whenever it's in the exhaust stream, so a dummy plug is installed when not in use.
