Edelbrock 1406 fast idle adjustment . 3. The idle speed screws are located near it, as in the picture. Warm high idle of 1100-1200 RPM. To compensate for these variables, even a new 1406 should be tuned up. The first problem I had, with mine, that I found out later, was that the fast idle screw was set to high and catching on the fast idle cam and not letting it drop down on the regular idle screw. Start by setting the base idle speed screw. Oct 19, 2002 · To adjust the fast idle screw, on the 1406, the engine must be off, and you open the throttle completely, which will swing the fast idle screw head into view and allow you to access it from the front of the carb. Oct 16, 2014 · Fast idle may be adjusted to manufacturers specifications (usually 1500 rpm) during normal choke cold operation. The Edelbrock carburetor has three (3) basic systems that meter fuel to the engine: The Idle System, Primary Main System, and Secondary Main System. It is important to verify throttle linkage, and or throttle blades are not binding and have a free range of operation. The dimension C should be 3/64" between the choke valve and the air horn. By understanding the operation of each you will be better prepared to calibrate your carburetor. Back it off about one turn. It does seem to be a little rich however. This is the idle while warm with electric choke open, fast idle screw not touching linkage when open. Choke must be completely open and fast idle mechanism completely disengaged. The choke hole valve should be closed as far as it will go without being forced. Is there a simple screw adjustment to lean the carb out a little without screwing something up? If this were The Edelbrock 1406 is a four-barrel "Performer Series" carburetor fitted with an electric choke. Will idle at aforementioned speed even with throttle completely closed, idle speed screw backed out where it doesn't touch linkage, and throttle cable & kickdown May 8, 2007 · Like austin-tatious said, there's a whole chapter on choke operation and adjustment in the Edelbrock owner's manual. Nov 22, 2004 · '77 Traveler 345 T19W Carb is an Edelbrock 1406 (elec choke). May 31, 2006 · I have a 600cfm Edelbrock 1406 carb on my 350. The idle adjustment screw is not even touching the If you are experiencing excessive high idle after installing an Edelbrock carburetor, take a few minutes to watch this video and troubleshoot your problem. It also meters fuel at off-idle throttle positions; a large percentage at just off of idle decreasing to a minor influence as the throttle is opened wider. He also suggesting turning the fuel/air adjustments in 1/4 turn. Bought a brand new gas pedal, stock throttle cable and a jeg’s mounting bracket. May 3, 2006 · To get to the fast idle screw, you have to open the throttle all the way, and only then will you see it swing into view and be accessible. In this video we go over how to adjust your idle mixture screws on an Edelbrock Carburetor. Edelbrock, LLC. I am not a carb guy. Choke Adjustment. This shouldn't be an issue if it's a new out-of-the-box carb. Make sure that the fast idle cam is not causing this. Properly adjusting the idle mixture on an Edelbrock carburetor is crucial to achieving optimal engine performance and fuel efficiency. Normally when the engine starts, vacuum pulls the choke open and pulls you down off of the high-speed portion of the fast idle cam. It Carburetor Idle setup: An Edelbrock / AFB style carburetor is pictured, but adjustments on a Holley are very similar. Mar 25, 2016 · -Edelbrock provides a description of how to adjust idle mixture screws that is somewhat accurate. If you need a tach or vacuum gauge here are some links: Tach - h Mar 25, 2016 · That is some pretty good info and seems you have picked up quite a bit working on your truck but one thing though when using a vacuum gauge to get highest vacuum on setting idle mixture screws on engines with bigger cams and more overlap they require a richer mixture and for instance on my 350 with a lunati voodoo hydraulic roller cam with 272/280 219/227 @ 50 515/530 lift with a 112 lsa I get To adjust, bend rod B. It sounds like your choke m A Lean-Best Idle Set is this. Jan 7, 2011 · 1406 Alan, I too, have a Edelbrock 1406 carb on my 350 Chevy engine w/ electric choke. Have the HEI installed and it is running pretty good. Adjust the idle-mixture screws again but this time decrease the idle of the engine with the left idle-mixture screw by 20 rpm before adjusting idle speed back to normal. I recently upgraded the factory carburetor to this Edelbrock 1406 unit, now I need to adjust the idle mixture screws, and I show you how to make the idle hap Mar 28, 2024 · If the carb has a choke check to see that the fast idle cam moves freely when the choke blade is fully open and is not contacting the fast idle screw. However, hooking up a low speed tach(optional) and a vacuum gauge(not optional), you can get idle mixture screws dialed in more accurately. Pump once to set choke, fast idle cam does come on, start truck and it'll fast idle fine, but as Idle System: The Idle System delivers 100% of the idle fuel. The problem I have is my choke seems set right, but the fast idle cam knocks off as soon as I step on the gas the first time. Idle Mar 25, 2019 · Edelbrock 1406 sitting on an Edelbrock 8725 wood spacer, sitting on an Edelbrock 2732 adapter plate, sitting on an Edelbrock Performer 400 intake. If you are experiencing a high idle speed when the engine is cold, and the choke is engaged, you may need to adjust the fast idle screw. Place the fast idle screw A between the two notches on the cam to adjust the fast idle linkage. The idle setting is critical both to a smooth idle at proper rpm and to a smooth transition to part-throttle operation. To adjust bend rod B. You must correct engine idle back to normal with the idle-speed screw after each idle-mixture screw adjustment. The fast idle screw A can be adjusted with engine off and throttle held open to allow screw head access. Although Edelbrock carburetors are designed to work right out of the box, variations in temperature and altitude can affect the carburetor's performance. Fast idle may be adjusted to manufacturers specifications Aug 3, 2023 · One thing to note, depending on the specific situation, you can adjust the idle speed screws or fast idle screws. Works pefect now. To adjust the fast idle linkage (Figure 6) place the fast idle screw A between the two notches on the cam. In other words, adjusting an Edelbrock 1406 carburetor requires no prior knowledge of carburetors. Recheck fast idle speed after each adjustment. This is from Edelbrock's website: Fast idle may be adjusted to manufacturers specifications (usually 1500 rpm) during normal choke cold operation. In this comprehensive guide, we will walk you through the step-by-step process of adjusting the idle mixture on your Edelbrock carburetor, ensuring that your classic car or hot rod runs smoothly and efficiently. This adjusts the mixture (lean/rich) by adjusting the choke plate. Shown below is a view from the bottom of a carburetor with a properly adjusted base idle screw - Jun 17, 2009 · I can't get my idle below 1,000 RPM with my Edelbrock Carb? Check for correct choke operation and adjustment. If tomorrow it's still too fast, back it off another turn. Repeat the process with the right idle-mixture screw. Oct 29, 2011 · To adjust high speed idle, turn the engine off and rotate the accelerator linkage plate & standing from the front you will see a screw head rotate into view - this is the high idle adjustment, turn in for higher and out to lessen. Sep 6, 2020 · The fast idle screw will not get out of adjustment. Verify the throttle arm rests on the idle speed screw. We’ll go over how it works and the key components t Apr 20, 2024 · Are you using an aftermarket throttle cable? I had alot of trouble with the Edelbrock card and aftermarket throttle cables. Jan 20, 2018 · first you need a tach , first set 1 1/2 turns out , start truck set base idle to 800rpm , turn screws out evenly , if idle go,s up reset base idle to 800rpm , turn screws out evenly , if idle go,s up reset base idle to 800rpm ,turn screws out evenly , if idle go,s up reset base idle to 800rpm , if idle stops go,in up stop there and turn screws back in a 1/4 turn , drop it in gear and check Sep 15, 2024 · Setting the fast idle speed isn’t difficult but there seems to be a bit of confusion as to how it works. In a nutshell, the choke housing is adjusted by loosening the 3 scews holding it, then rotating it. Adjusting an Edelbrock 1406 carburetor is a relatively straightforward engine maintenance task. Close the choke valve as far as possible without forcing it. Starts fine, runs fine but it idles at 1000-1100. Idle System: The Idle System delivers 100% of the idle fuel. This carb is new. The fast idle speed is set with a screw, with the eninge OFF. Richer settings than this may tend to foul plugs rather than improve the quality or performance of the idle. I have adusted it to where it will not touch anything. First off you want your engine to idle around 700 to 900 RPM. Known for its simplicity, durability and performance, the Edelbrock 1406 requires no electronic equipment and no understanding of vacuum lines. Look for binding in the fast idle cam linkage and in the choke linkage in general. 69 Javelin with mechanically stock 84 360/727, hei distributor, edelbrock performer intake, edelbrock 1406 carb, 5-6 psi electric fuel pump. May 13, 2003 · You need to adjust the fast-idle screw. Jun 19, 2012 · I talked to a tech at Edelbrock (after waiting 10 minutes) and he said to adjust the fast idle. Other than that adjust the idle mix screws in gear and with engine warmed up. Check to make sure that the primary and secondary throttle blades haven't been drilled to provide idle air bleeds by a previous owner. If your engine is running right after the car installation but you cant get it to idle low enough, check out this video and the solutions it can offer. vcjmmrcu ifilq nzr suwf hztkon djrn ipzluiu tiichvj cllvvh eduhm yix lmyz wosq zvc dxzj