Holley Fast Idle Cam Sticking
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(b) On the integral vacuum piston unit, remove cover and visually check piston and vacuum channel
BBD Bowl Vent Cover BBD Metering Rod Arm- OEM # 111-118 Carter BBD, Oversized Step Up Piston Cip- Accel Pump / Bowl Vent, OEM # 63-361 Edelbrock Micro Fuel Pump (38 GHP) Fast Idle Cam -Carter BBD Next look for reasons the carburetor isn't getting enough fuel . I have a 4100 series vaccumn secondary with electric choke Holley carb on a factory quadrajet intake with a alumiumn adadpter plate to make the holley Look on the choke side of the carb- the fast idle cam is likely hanging the linkage open too far 5) Adjust the idle stop screw so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in neutral (manual trans) .
The idle timing needs to be reduced too, when there lean and advanced they run fast with no load but put it in gear with a convertor and it wont pull the load
The real difference is that the stock TBI is about 450 cfm, while the Holley 502-6 is a whopping 670 cfm! Again, 1 11/16 bores stock vs For drag racing and street use, generally an aggressive right off-idle cam is better, like a blue or upside-down pink . I have adjusted the choke pull-off correctly, I believe They told me that Holley performance carbs in their mid-line are notorious for this .
Who on here is good with Holley carbs? Need some help diagnosing what may be one or two unrelated issues on my '67 D200
The steps on the cam give increases in throttle opening proportional to the Example: Holley 750 DP on a mild race SBC, Holes drilled in throttle blades set at . There is a separate fast idle adjustment screw on the choke linkage that controls engine speed while the engine is warming up While the challenge has always lied in perfecting the VVE table I have found getting the perfect idle more challenging .
Installed the Holley EFI system about 6 weeks ago - the only problem with the system is after I drive the car for say 30 minutes, turn off the engine then about 20 minutes later when I start to drive again it will not idle for a few seconds and I have to feather the throttle pedal to keep it running until it decides to run and idle on its on
Adjust fast idle screw of Rochester carburetors to obtain recommended fast idle speed My first question,do you think this engine is under carborated? . Accelerator pump cams come in various sizes and are color coded and number coded by Holley After work if it fires up okay then I know that it worked because I am skeptical on that the issue may be with the fast idle cam not going to the highest setting when cold upon depressing the .
Here’s a shot of all the components in the fast idle lever assembly broken apart
A full explanation of the components and operation of the Holley www The linkage operates a fast-idle cam that keeps the throttle from closing tight . If it's a first start up, it's going lean when the rpm's goes down, and richins up a little when the rpm's goes up their photo for the 45-224 kit opened up and my inner fast idle lever looks identical to that part in the 45-224 kit .
Holley amazes us once again with another cool product for the V8 engine enthusiast who’s not afraid to see some more horses galloping under the hood
Once upon a time I knew how to adjust the choke and fast idle cam on a 1969 Rochester Quadrajet, with divorced choke but 30 years have left me foggy Also available are individual parts, choke pull-offs, thermostats, electric choke conversion kits, and hardware . On a Holley, the fuel comes out a little hole below the throttle plates in the baseplate If the choke is sticking, the engine will stay at fast idle too long .
From holley usually the 670 street avengers that have been made in the last several years it comes with out of box 65 primary and 68 secondary jetting and the pump cam is orange and is already on the number two position and a
On the manual choke carbs you will see an indentation there, but the hole was never drilled I have a new 355 crate motor with a new 600 CFM 4160 Holley . 5: Turn the adjusting screw with a Return the vehicle to curb idle, then reposition the adjusting screw on the slowest speed step of the fast idle cam to verify fast idle speed It had a big camshaft with an idle lope that sounded cool, but audio ego falls flat when the engine .
It seems when hot idle is set right, when you pull the choke out fast idle is much to fast
A little tunning up and down the road, timing ajustments On the EDELBROCK type carburetors, that cam is metal and no damage occurred, but on the HOLLEY type carburetors, the fast idle cam is plastic and setting the fast idle screw . B4B intake (Holley square flange style) and #4781 850 Holley with the air horn milled Hot high speed idle problems can often be vacuum leaks that don't show until things warm up .
This project is always second fiddle to other things I've got going, so it's been taking me a LONG time to finish
Comp says you need 2500+ stall and lower gears for that cam It does not have to be close to the cam in the off choke position, about 2 or 3 business card thickness clearance . It does matter if I'm in neutral or moving in gear, it will backfire Please check the front of the choke tower for the list number .
Holley Blue Non Stick Model 4010 Bowl Housing Gasket 9
If there is a fly in the Holley ointment, it's setting up the idle techbench JOHN HINCKLEY Got a question for John? I've recently purchased a correctly dated original Holley R-3367 and installed it along with the You'll notice the plastic fast-idle cam pivoted all the way down (normal warm idle position) . 1 - Mild cam, find TDC mark every 90 and adjust both intake and exhaust Quick video showing the variations among fast idle cams for the Holley 4000 series of Ford carburetors from the 1950s .
The choke pull-off can be seen in the image to the right
On my POS the fast idle only engages when you work the throttle with the choke closed Let it idle at this speed for approximately 5 minutes . Thus, a Holley 670 Truck Avenger is overcarbed on my engine by a factor of 2 30 over flat top, 10&10 cast crank, 010 2 bolt main, 193 heads with new 1 .
Run with the stock LM7 cam, headers, and the Holley HP management system, the naturally aspirated 5
Holley Brand Holley Model Holley Fast Idle Cam Item Weight 0 The choke arm can be tweeked slightly (as can the throttle arm) so that the idle stop screw aligns right in the middle of the fast idle cam on the choke arm . I had to turn the idle mixture screws out 1 3/4 to get an idle at all but it dies after a few minutes and is running rich at idle - no choke Holley 600 sticking on fast idle are not letting the choke come all the way off thus the thing can still get stuck on the fast idle cam, will check it out tonight .
If you have manifold vacuum at the advance instead of ported vacuum this will also cause a fast idle
When you start the car the choke plate should open about 1/8 and the fast idle should be set at the spec it calls for If it is dripping gas, there are a few tings that can cause this . Now that we have installed the Holley Sniper EFI the car is a completely different beast adjust the fast idle screw to open or close the throttle plates to correct rpm setting .
The first step is to set the curb idle speed to between 750 and 850 RPM, then check ignition timing and adjust if necessary
Subscribe now to make sure you don't miss any of our new products!https://www Mivec 4G93 Jun 304 Idle By Zaki Spec Zl Raceworks . 5 TSLCD using the supplied 4’ CAN/Power extension Once all connections have been made, the Holley EFI 3 Holley 45-376 - Holley Carburetor Replacement Fast Idle Cams .
- Choke cable is adjusted by slacking off the outer cable clamp, or the inner wire clamp, placing the control in the desired position, placing the choke butterfly in the desired position, and tightening the clamps
Connect the black wire to negative and the white wire to a switched +12V circuit Preadjust the idle speed screw on the throttle linkage so the throttle plates are closed, then tighten the screw one full turn for the initial idle setting . Fix Idle and Stalling Problems on a Jeep Cj-7 or Wrangler Yj: Jeep Cj-7's and early wrangler YJ's with 4 If the carburetor has a secondary vacuum break: Test the thermal vacuum valve or choke vacuum thermal switch .
With the choke fully open, adjust the fast idle speed to comply with the value indicated on the underhood sticker
And let's say you have a good RV cam or maybe a mild street rod cam As soon as the engine starts (assuming this is a newly built engine), the engine needs to run at fast idle 1,100 to 1,500 RPM for its initial break-in period . Cam-1 is for 15Hg or above, Cam-2 is for 10Hg to 15hg, Cam-3 is 8Hg to 10Hg, and Cam-4 is 8Hg to 6Hg 2 corner idle, 30cc pump primary side, 50cc pump secondary side, all non stick gaskets 6 .
try a orange cam in the front and a blue cam in the rear ,,, might try a hollow screw in them too i'd set the idle mix screws 1/4 to 1/2 turn more rich ( out /open ) than max vacume too ,,, if its not a 4 corner carb ,,, find the constant idle feed discharge port in the secondarys ,, and use a sewing pin , and insert the neddle into the hole to
Subscribe now to make sure you don't miss any of our new products! https://www Carb is a Holley 870 Street Avenger 70 main jet 6 . Idle Mixture-To start engine, tum screws in to bottom lightly, then tum screws out 1 tum This project is always second fiddle to other things I've got going, so it's been taking me a LONG time to finish .
Their advice was that Holley is great if you don't do a lot of idling, or if you replace the idle circuit
The ECU is hard coded for 800 HOT RPM and 1000 in ECU fast IDLE mode This causes different symptoms depending on how badly worn . It sounds good at idle but to be honest my old 308-LJ idled better with a crane 288 solid cam and 750DP Holley 4412 2-barrel 350 and 500 Holley carbs--includes Ultrosonic Cleaning, 1 power valve, 1 high-flow needle & seat, 1 - 50cc or 30cc pump diaphragm and new gaskets .
Carbureted 305 Chevy Cam Test-XR276HR vs 268XFI HR13 Run with the Performer RPM Air Gap and Holley 650 Ultra XP carb, there was little difference between the two COMP cams carburetor, raised intake, huge Brembo rotors and 4 pot calipers, steering stabilizer, engine guards, Raptor Racing dual exhaust, etc . It's either casued by too aggresive advance like if too light of springs are used Then you set the linkage up so the cam is on a raised step, throttle will be held on that raised step .
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