edelbrock 1406 carb. A/F mixture screw.

I wouldn't have believed it, but I pulled the screw out and as Vickey said I hit it with medium air pressure and problem solved. I now can adjust my carb. I want to thank everyone for their help on this carb.

 

Believe believe believe .


Even though I brought that little tidbit here I can't take credit for it because its directly from edelbrock trouble shooting guide

 

Sure beats the hell out of changing carbs, changing manifolds. A little air pressure goes a long ways to clear a air p***age. I've cleaned a few Edelbrocks ,and I can't believe how many are ran without fuel filters. Glad you found the problem.

 

I'm glad you got it taken care of and thanks for giving us an update. Also glad you didn't take it to the gun range and shoot it.

 

unreal, I have a filter at the cell, and at the carb. now when I put the '33 willys sedan in gear, its smooth. yeh baby.

 

Three words. Long. Test. Drive.

 

There are air bleeds on those carbs.
Dirt can plug up an air bleed and dirt can make its way into the fuel circuits via the air bleeds too.

Run a good air filter, and filter base with a gasket.

 

Yes, it don't really sound like a vacuum leak.
There are times when the carb has trash inside the p***ges from the machining and that would explain a lot.
You have checked and adjusted all possible problem areas and nothing has changed, has it. The problem is consistant. I would think that with all the things you have tweeked and fiddled with the problem would at least get worse or you'd have a new set of problems.
But that hasn't happened, has it.
It is time to get a new carburetor from Edelbrock.
there is a good many of us on here taht could solve the problem but when something new gives you that much problem from git-go then it generally goes downhill from there.
Sorry i could be of more help, oj

 

He fixed it.

 

Cool! Just gotta love a happy ending.

 

Dirt, dirt dirty...
A carb's worst enemy and 90% of carb problems...

Glad you got it fixed!

 

so am I glad. and thanks to all of u!!

 

Thx to the OP for coming back and posting the solution. Far too often the problem gets fixed but those who've followed the thread and offered input are never told what fixed it.

 

Post 7 had the solution!

 

ya no, I thought engineman was kidding, so I just let it slip by. now I know he wasn't kidding. there are sometimes that u get an answer to a post, and its a person making fun. not to say that was the case, but I thought it was. thank-u engineman that's exactly what the proglem was.

 

Always a mystrey untill you find the solution! It amazes me with all the careful attention we pay to cleanliness around a carb how dirt still finds it way into these small orfices and bleeds, sometimes from the air filter entrance, other times from the fuel filter supply. Sometimes you just have to do what you did, keep trying the little things and before long two things can happen, you fixed it and now your knowledge is increased! Excellent news and again, thanks for posting the results.

 

I just had a very similar experience with an edelbrock 1405 carb. My issue was not entirely carb related but I did wind up tearing the brand new carb apart and found a small amount of **** inside it. Funny because it was a new tank, new fuel line and fittings, new fuel pump, filters and carb. From this point on I will always do a preliminary dis***embly, cleaning and re***embly with any new or old carb. Good learning experience but it ****s to waste time chasing your tail getti g it figured out. Glad you're back on track.


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I'm posting here since my carb wasn't running as good as it could. I love to tinker, so today I played around and figured it out.

First, I was running manifold vacuum on the carb. On the Edelbrock 1406, TIMED is on the right (p***. side) and MANIFOLD is on the left (drivers side). There's also manifold vacuum on the rear of the carb, but it's for power brakes and I have it plugged.

I switched to the TIMED port as per Edelbrocks instructions. I SWEAR I had never seen that section before! I then reset my idle to 800 RPM. A trip around the block revealed a good change in running and sitting at a stop sign. Then, I adjusted my A/F. She had seemed to be running a little rich, so I leaned her down a little. This also required me resetting the idle back to 800, because it dropped when I leaned her out. After a test drive she felt a lot better, but I was still getting a second or two of hesitation off the line. So, I adjusted the accelerator pump. I moved the accelerator rod from the middle hole, on the lever, to the top hole. This would give me a better initial shot of gas at throttle. Another test drive and I was smiling ear to ear. Throttle response is now instantaneous.

Here's a link to Edelbrocks FAQ page. I found good info in the FAQ section and the video section.

 

tfeverfred, i'm running my carb. off the drivers side. i'll have to see if it runs better on the p***. side. but it seems to be very happy where it is now. I think it all depends on what kind of va***e advance your running.

 

True. Your results may vary. When I first installed this carb, I looked all over for advise on the vac port selection. It was 50/50 right or left. So, I went the left. In fact, the instructions said the right was for emission equipped cars. But lo and behold, I find new info on their site saying "emission AND vacuum advance" cars use the right side. So, I switched to see what would happen. It made a difference for mine on the positive.

I think it goes back to "every engine is different". So, experimenting with your car is the only way to go. I don't normally worry about gas mileage, but I'm interested to see what I'm getting now. I used to get about 15 mph before I reset my timing last month. It went up to 17-18mph after going 16 initial. So, I'm thinking by leaning it a little and switching ports, I may get 19-20mph. Or not. My main concern has always been idling and off the line.

 

Forgot to mention, I installed a fuel regulator. I moved it from 6 psi down to 4 1/2psi.

 

put the v/advance line on p***. side. now my timing I got at 14degrees before. just were the speedshop that built it said I should be between 10 and 14. it runs the best at 14 starts cold and hot very well. I also have my f/pressure at 4 1/2. had it at 5 1/2 but wasn't as snappy as at 4 1/2. but time will tell when I get it on the road. but I think its ready to go motor wise. I need to get the brake lites and headlights mocked up, I have all the new wiring harness run just need to mount them.

 

Is it the car in your avatar?

 

no that's my henry j I restored. I got done with that in 2003. its my '33 willys sedan im building. u can see it in my albums. JAN

 

Found it.

 

I don't mean to resurrect this old thread but I have been dealing with this same issue for two weeks beating my head against the wall. After reading vickey's suggestion about blowing out the idle mixture holes with air I tried it and it totally fixed it. So thanks a bunch to all of the knowledgable people on this forum. Curtis