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Old 01-28-2009, 04:24 PM
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Edelbrock 1405?

Ok guys, I'm in the process of trying to tune my 1405 and I read so many of the previous posts that they all start running together. I've ordered the fuel pressure regulator so I can adjust the pressure to between 5 & 5 1/2 lbs but now I can't remember which way to turn the two adjustment screws on the front of the carb. Is it "in to lean" & "out to richen"? I want to get all this right so I can hopefully get this truck up and running like it should. Thanks.

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Old 01-28-2009, 04:28 PM
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Go to www.edelbrock.com and print out a manual for your carb. Here is a link to download a manual http://www.edelbrock.com/automotive_...ers_manual.pdf

Last edited by Henry Highrise; 01-28-2009 at 04:38 PM.
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Old 01-28-2009, 05:29 PM
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Quote:
Originally Posted by muzzfactor
Ok guys, I'm in the process of trying to tune my 1405 and I read so many of the previous posts that they all start running together. I've ordered the fuel pressure regulator so I can adjust the pressure to between 5 & 5 1/2 lbs but now I can't remember which way to turn the two adjustment screws on the front of the carb. Is it "in to lean" & "out to richen"? I want to get all this right so I can hopefully get this truck up and running like it should. Thanks.
you have it right, "in to lean" and "out to richen".
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Old 01-28-2009, 08:37 PM
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Good starting point

Turn in all the way, til lightly seated
Back out 2 full turns

This will usually get you pretty close
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Old 01-29-2009, 06:35 PM
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Ok guys I've got another question. the fuel pressure gauge is erratic bouncing from 4 - 5.5 lbs while at idle, but once you push on the throttle it calms down and settles in a 5.5. Is this correct or do I need to adjust it further? Now another problem has reared it ugly head, once i shut the truck off it's now "dieseling" for about 2 seconds. What causes that? Thanks.
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Old 01-29-2009, 06:40 PM
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Quote:
Originally Posted by muzzfactor
Ok guys I've got another question. the fuel pressure gauge is erratic bouncing from 4 - 5.5 lbs while at idle, but once you push on the throttle it calms down and settles in a 5.5. Is this correct or do I need to adjust it further? Now another problem has reared it ugly head, once i shut the truck off it's now "dieseling" for about 2 seconds. What causes that? Thanks.
my guess is, a vacuum leak. somebody correct me if im wrong.
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Old 01-29-2009, 06:58 PM
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Stuttering fuel gage won't be an issue

Dieseling:
Throttle plate is not closing
too rich an idle and dribbling fuel
Perhaps idle was adjusted with engine cold and on one of the choke steps
Timing outta whack.


?????????
This Edelbrock replace a q-Jet??????
If so---you will need the adaptor plate to avoid vacuum leaks.

Perhaps the engine decided it did not want ported vacuum advance

Why the carb change???
Is this on the Pontiac---or the Chev pu??
The chevy may have a computer issue and does not like the non electronic Eddy carb.

Just tossin' crap out for ya.
If it is any consolation to ya---I'm still trying to get issues ironed out the Elky.
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Old 01-29-2009, 07:24 PM
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Hey Bryan, this carb is on the 350 motor that I have in my '84 p/u. It doesn't have any computer stuff on it. My idle may be a little high, I'll try and drop it a little and see if that helps. Thanks and take care.
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Old 01-30-2009, 03:36 PM
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Im new here so im not sure what your vehicle is or what youve done to the engine or anything else but if you have a big cam and the engine lopes, maybe that is why the pressure is irratic at idle.
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Old 01-30-2009, 08:19 PM
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?????????
This Edelbrock replace a q-Jet??????
If so---you will need the adaptor plate to avoid vacuum leaks.

This is a thin plate that requires 2 gaskets-----you WILL have vacuum leaks w/o it


Torque454------84 Chebby 1/2 ton

I think it is stock---not sure tho---been awhile since I've seen Muzz
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