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Old 12-15-2004, 09:28 PM
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1406 edelbrock problems

I have a fairly new 1406 on a Chev 350. I have developed a flat spot on acceleration. Right after idle it wants to bog. I took it apart and everything seems to be ok. Any ideas? Also, when I first press on the accelerator in the morning to set the chock I feel a fairly strong resistance than it snaps free and allows my foot to go to the floor, what could cause that? Thanks
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Old 12-15-2004, 09:30 PM
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It sounds like you need more accelerator pump. Maybe it is binding up somehow.
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Old 12-15-2004, 09:40 PM
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Could be the pump, when I had it apart it appeared to be ok. I'll take a hard look at it in the morning.
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Old 12-15-2004, 09:46 PM
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Seems to be something somewhat common with the 1406 model. They had smaller metering jets than thier non electric choke counterpart 1405 but I dont know if that would fix your problem. I changed the metering springs when I had one however that didnt cure the problem.
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Old 12-15-2004, 10:11 PM
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Try cleaning the emulsion tubes and ensure the transfer slot passages are clean.
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Old 12-15-2004, 10:25 PM
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Just checked the accelerator pump, it's working fine.
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Old 12-15-2004, 10:27 PM
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It may be working fine, but does it need more pump shot? You may not have enough.
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Old 12-15-2004, 10:49 PM
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i also had that same problem with my 1406 on my 305, id get hesitation till about 2000-2500rpm, then it was fine till about 4300rpm then it would drop off again, i have since changed the carb because it wasnt mine and all the problems are fixed, but there was also some binding and it would stick at about 2200 rarely( thank god i have a clutch to save me), and it did this with the pedal linkage dissconnected also.
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Old 12-16-2004, 10:14 AM
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Try checking your pump adjustment linkage. It has 3 holes. Try moving it to the bottom hole. sounds like too much fuel. Maybe your linkage is in the middle hole.
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Old 12-16-2004, 11:20 AM
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What a surprise, another "edelbog"

I've gone through so many edelbrock carbs its not funny, and it seems they all start out with this problem (I think we've all seen about 90 posts on this board with this same topic).

Anyway, you don't fix a carb by "messing" with stuff until you think it runs better. First thing's first. What compression are you running, how heavy is your car, what gears? What kind of build do you have on this motor, what kind of intake? This info isn't going to solve the problem, but it will help people give you more accurate info.

From my experience, 99% of the time the problem is not in the accelerator pump, but it is the easiest thing to adjust, if you'd like to try working with it a little. Before you do that, however, do this:

Tune your timing in, then put the car in drive and tune in your idle circuit with the screws in the front of the carb. How much timing are you running initial? Total? At what RPM is your advance all in?

Every time I've fixed one of these carbs bogging, the biggest difference was noticed when I put lower vacuum springs on the metering rods. It makes the transition to more fuel slower, and usually eliminates the bog.

Good luck-

K
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Old 05-10-2013, 11:57 PM
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Hello I have 85 ram d100 with 318 had 2 barrel upgraded to performer #1406 and performer edelbrock intake can get her running but floods out badly has will pour out the vents on top of carb any tips would be great
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Old 05-11-2013, 05:22 AM
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Looks like you picked an ancient thread to post to - but ,,,,

Take your carb off, disassemble the top , clean it out and install a new/better inline filter. When you are done doing all that, check the float level, reinstall, then check the fuel pump pressure. An Edelbrock only needs 4 -4.5 pounds (that's info in their IB which you absolutely need to understand)
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Old 05-11-2013, 06:02 AM
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I threw away 2 of those POS carbs for the same reason. That plus vapor locking issues due to the carb being made from the wrong material to sit on top of a hot V8 engine.

The problem is the accelerator pump seal is getting stuck the the pump cylinder bore, which cause the whole carb to have a sticking point right after idle. The cylinder bore gets a groove in it which captures the pump seal.

My advice is to throw the carb in the trash, tell everyone you can that these carbs are junk, and get a holley 3310.

Edelbrock makes really good intakes but should be ashamed of themselves for making a carb like that.
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Old 05-11-2013, 07:17 AM
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Quote:
Originally Posted by Irelands child View Post
Looks like you picked an ancient thread to post to - but ,,,,

Take your carb off, disassemble the top , clean it out and install a new/better inline filter. When you are done doing all that, check the float level, reinstall, then check the fuel pump pressure. An Edelbrock only needs 4 -4.5 pounds (that's info in their IB which you absolutely need to understand)
thank you for replying i will deff try all that you have mentioned will keep ya posted thanx again
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Old 05-11-2013, 09:43 AM
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........ and as far as Edelbrock quality on the carbs, I've been using them since they first came out and the only problems I've ever had was dirt once and high pump pressure on a 460 powered pickup truck. These Performer carbs are a mildly updated Cater AFB by and built by Magneti Marelli Powertrain USA - some of which have that or Weber cast on the main body - I have one of each right now. This is the Speedway filter I'm using now:





(both brackets are on the filter now)

Gasoline that had MBTE additive affected any carb that was made out of aluminum, regardless of brand. Luckily we never had it where I live and even better yet, it has been banned as an ecological problem from the rest of the country
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