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I got a 1985 international bus with a holley 4160 carb. it only seems to start with starting fuel. How can I get it to start by turning the key?

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  • Cars & Trucks Master
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Hi Shirley, I think that the problem may be, incorrect ignition timing, or possibly low compression or the accelerator pump which is part of the carburetor. Before doing any work on the carb, check the ignition timing. If there is no improvement, carry out a compression test. If it gives good results work on the carb. It will need removing, stripping, cleaning, re-jetting, assembling and then adjusting. The job is far more difficult than reconditioning an engine and requires expertise and experience. Hope this info is a help? Regards John

Posted on Oct 13, 2013

Testimonial: "Since the carb caught on fire, wrong person helping to start with start fluid...I have pulled carb and cleaned it. will check ignition timing this week. accelerator pump??looking it up now. Thanks John"

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Posted on Jan 02, 2017

  • 6 Answers

SOURCE: Gas engine starts then stalls

The shop should have adjusted your air/fuel mixture on the carb. considering the year of the vehicle, you may need to replace the carb with a factory re-manufactured unit. Even if you replace the carb with a re-man, it will still need to be adjusted to optimum performance for your particular vehicle.

Posted on Sep 09, 2009

  • 182 Answers

SOURCE: Bronco Wont Start (help please)

Your cam could be flat.

Posted on Aug 24, 2008

mgbstyle65
  • 2 Answers

SOURCE: 1985 VW Cabriolet

Possibly a clogged catalytic converter. Even if it is clogged it can be irratic. I had a muffler shop check it by cutting a hole before it with a torch, changed it out and i was good to go.

Posted on Aug 06, 2008

jswizzzzzle
  • 74 Answers

SOURCE: I have a 1985 Mustang 5.0 with a holley 4180 carb.

google search this. "1985 Mustang 5.0 vaccum diagram" all the info is there, I checked

Posted on Feb 05, 2010

  • 373 Answers

SOURCE: My Dodge 1985 d150 won't start. New starte,

if you hear a loud click from starter it could be the motor contacts in the starter have gone bad. you will have to remove starter and have it repaired or replaced. check again to make sure that the battery is charged up on truck. also check for a loose ground wire to starter or engine block.

Posted on May 01, 2010

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1 Answer

I have 2 holley 4160 450cfm carbs on tunnel ram. Electric fuel pump. And after winter storage the front carb is leaking fuel at the top of the back float bowel.


you might try tapping on the top of the carb as it sounds like the float is stuck or run some gum out through the carb and it might remove the varnish in the carb. If not you will need to remove it and rebuild the carb.

Apr 12, 2017 | Cars & Trucks

1 Answer

Thank you..i have a holley 4160 back fireing after rebuild


Timing or a bad intake valve is the only way a backfire through the carb can happen.

Oct 22, 2016 | Cars & Trucks

2 Answers

1979 FoMoCo 4 Barrel carb. Getting good fuel flow and pressure to the carb. Engine will start and run for a few seconds then run out of fuel. New fuel pump has been installed. Can blow through gas...


is the needle opeoning on the float in the carb? The fuel bowl should be about half full all the time. As fuel pressure flows into the needle & seat, it fills the fuel bowl until the float pushes the needle into the eat. Sometimes the rubber tipped needle can stick in the seat.

Holley carb? Autolite carb? Holley 4160?

Sep 09, 2011 | Ford Econoline Cars & Trucks

1 Answer

Hello, After my 1987 F-250, 7.5 L V-8, 4BBL sits for more than 12 hours I have to pump the accelerator anywhere from 20 to 50 times to get it to start. Once it starts it runs fine. I have replaced every...


That would be a Holley, probably model 4160 carb on it. You need to do a little detective work on this. You either need to adjust the choke or find out where the fuel is going after 12 hours.

First, when the engine is running check the Intake and Carburetor gaskets for vacuum leaks. Also spray by the Vacuum reserve canister (Like a coffee can) with either Choke cleaner or a water mist. Either way the RPM will change if you have a Vacuum leak. Fix the vacuum leak if you find one. The engine needs Vacuum to draw in the fuel for a cold start. There are vacuum ports with gaskets (Hidden until disassembled) where the Choke housing attaches to the main block of the Carburetor. A leak here will mess up the tiny piston inside the Choke. (Its under the Black cover and operates the stepup for cold starts).

The black choke dial should be set for 2 marks rich. You should not need excess force on the choke flap to unload it. The choke flap should maintain an opening about 2 credit cards thick measured between flap and carb housing. To get this space you bend the rod pushing the choke flap. This should help the choke work better.

If this does not help, on the next 12 hour interval check for fuel by taking off the strainer on the Carb inlet and remove the line from the carb to the pump. If the fuel line is dry you are losing the Prime to the pump. You must have either a bad pump or a hole in the fuel line from the tank.

Would like to know what you found. The Power pump inside the front bowl of your Holley has a number and you can go to a Holley website to see if it is correct for your truck. The fuel inside the front bowl of your Holley should be enough start the truck. Even if the bowl went dry overnight, the fuel pump would replenish the supply well before 20 to 50 pumps.

Nov 04, 2010 | 1987 Ford F 250

1 Answer

I have a 1984-85 holley 4 barrel and it has


Electric fuel pump most likely has too much pressure for the carb. AFAIK, the Holley 4150/60 & 4165/75 should each demand the usual 4.7-5.3 PSI (4.7 @ idle, 5.3 @ max RPMs), so even the Holley red pump would need some restriction from a regulator. If you want this to be adjusted to its best efficiency, you need to have a fuel pressure gauge installed temporarily, if not on the regulator like I have on my Scout II. FWIW, the regulator I have installed is the Mallory 4307M from CenturyPerformance.com, Summitracing.com, Jegs.com, etc.

http://www.malloryperformance.com/pdf/4307M.pdf

A bad Needle & Seat will do this also, or debris stuck between the Needle and the Seat. This is where light tapping on the bowl helps, but it's best to run the fuel out of the bowl a few times and then the volume flow, or quick filling of the bowl, should loosen up the debris.

You also could have set he fuel float too high. What model carb, the ones I mentioned above (AKA Holley Modular Carbs)? If so, then Holley's site has a tech center & instructions on setting the float(s). www.holley.com

Set the floats carefully and slowly/gradually. Make sure the lock screw is always loose enough before turning the adjustment nut. If you strip out the bowl's threads on an older carb, you'll beat hell finding a replacement. 1/12 turn = 1/32" of fuel height IIRC. You set the fuel level, with pump running (wrap a rag around the carb so gas doesn't leak onto the manifold!!!) so the fuel is just starting to dip out of the "peep-hole" in the side of the float. Removal of the peep/seep-hole screw/plug is necessary first. Clockwise rotation of the nut lowers fuel level IIRC and counter raises fuel level. Again, please check their website. Most people get discouraged when dealing with the Holley Modular Carbs, but they are the simplest and the best carbs on the market. Even if 30+ years old.

Apr 15, 2010 | 2000 Ford Expedition

1 Answer

Should I rebuild my Ford Bronco 351 Windsor Holly 4 bbl carb or replace it with an Edelbrock carb?


In all my experience, if you know how to correctly tune a edelbrock then go with that, but, holley has outstanding carbs that can muster up to an output of 1,200hp. it would be much cheaper to et a rebuild kit from say, o'reillys, 20-45 dollars depending on which one you have.
I have a 1985 Bronco 351w 4x4, i just rebuilt my holley and she runs smooth

Apr 15, 2010 | 1985 Ford Bronco

2 Answers

How do you adjust the float in a holley carb series 6280


Go to Holley.com they have links to you tube videos showing how to adjust the floats and choke on all their carbs.

Mar 29, 2010 | 1985 Dodge Ramcharger

1 Answer

Gas engine starts then stalls after a few minutes of running and then will not start again. Carb smells of gas. Seems flooded. Replaced coil without improvement. Been in the shop 3 times, each time tuned...


The shop should have adjusted your air/fuel mixture on the carb. considering the year of the vehicle, you may need to replace the carb with a factory re-manufactured unit. Even if you replace the carb with a re-man, it will still need to be adjusted to optimum performance for your particular vehicle.

Sep 09, 2009 | 1985 Ford F 250

1 Answer

1985 camaro that does not crank


Stop jumping all over the place!!! 1. check for spark. If none find out why. Check for proper timing. "basiline" timing at about 8 degrees btc. MSD units are nice when they work, but if no spark, pull it out and get an old style hei setup and stick it in there for a while.(hooks up with one hot lead) 2. If spark is working, check bowl levels on carb (I do this by attaching a syphon hose to fuel inlet and opening port on side of each bowl, adjusting level so fuel does not spill out and is just below level of hole.You checked the chain...is it in "straight up"? (cam mark down, crank mark up)
Fuel pressure should not be above 7.5 lbs. in fact, for start up testing I'd lower it a bit to about 5psi. (use a gauge) That way you won't be blowing needle valve off the seat. Unless you have the valves adjusted too tight, there is no reason for it not to start!!!
Good luck!

Mar 07, 2009 | 1985 Chevrolet Camaro

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