When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Have you set the idle screws correctly on this unit......too lean will make it run like crap til it warms up. Start there. Then go to the choke....only if needed. Edelbrock's setting is a good one and almost never has to be changed....this is why there is rivets in it.
Also, verify your vacuum advance is going to full manifold vacuum at idle and not ported.....I believe you have it on the ported right now but hard to tell.
Remove the teflon tape from the flare fitting. You do not seal flare fittings at the threads of the flare nut.
Check ignition timing as well......you need to be 36 degrees total at 3000rpm.
Looks like you scored a very nice Edelbrock unit......these have been discontinued for over ten years.
With the Edelbrock you will need the Lisle Q-Jet idle screw tool.
Looks like you have found yourself a Edelbrock 1903.
Yes, if you want to adjust the choke those rivets must be removed.
First I would start by connecting your distributor vacuum advance hose to a full manifold vacuum port.
Where you have it now is ported vacuum on the 1903
The one capped off just above and to the left is Full Manifold vacuum.
The choke plate should be open about 1/4" to 5/16" after engine first starts on a cold start.
Last edited by bmotojoe; Sep 14, 2021 at 09:39 AM.
I cant believe those A/F tools are so expensive now...
I paid like $12.00 for mine back in the day...
Also works well to adjust the power piston height...
From: At my Bar drinking and wrenching in Lafayette Colorado
Originally Posted by mrsteve09
Once started, slight pressure on the gas pedal needs to remain to keep the engine running.
MrSteve09
Why don't you just raise the fast idle a little by turning the fast idle screw? Have you adjusted the choke pulloff to richen it up a little while it's cold? The choke should only crack open 1/4" or slightly less (measured from the forward lower edge of the choke plate to the forward airhorn choke casting wall) upon cold engine start. Turn the pulloff adjustment screw to change it. As Jebby noted, it's seldom that the Edelbrock setting for the choke housing needs to be changed. If the choke snaps fully closed when you crack the throttle open on a cold engine, the choke is adjusted correctly - don't mess with it.
Choke Adjustment
