AMC Eagle Den Forum

The Mighty 258 => Fuel Systems. => Topic started by: 85AmCfreak on June 07, 2013, 06:50:00 AM

Title: Feed back carb, hei ignition??
Post by: 85AmCfreak on June 07, 2013, 06:50:00 AM
Is it possible to use the original Carter feedback carburetor with a Gm H.E.I. distributor?
Title: Re: Feed back carb, hei ignition??
Post by: nolang on June 07, 2013, 11:12:44 PM
I had that setup for a while before getting the Weber 38 and didn't have any issues, the HEI is definitely a nice upgrade from the stock distributor
Title: Re: Feed back carb, hei ignition??
Post by: carnuck on June 07, 2013, 11:58:57 PM
Before you pull the dist or mess with the wiring, turn the key on cold and unplug the connector on the back of the carb. Then it won't mess with the idle and it will not have too lean/too rich running happening. If you mod the HEI to use a later GM system, the distributors have a connector for computer controlled timing for EFI, but I'm not sure how to wire it to work with the BBD. TBI systems run them.
Title: Re: Feed back carb, hei ignition??
Post by: 85AmCfreak on June 08, 2013, 11:34:32 PM
     So When you say turn it on cold You mean key on but don't start then remove the connector from the stepper on the back of the carburetor? The distributor that I am using will be the early H.E.I. Another question I have is, when does the light on the dash for service emissions come on? I have never seen this light illuminated. Thank you both for the information I will be doing this tomorrow or later this week.
Title: Re: Feed back carb, hei ignition??
Post by: ammachine390 on June 09, 2013, 12:36:01 AM
Realistically, you should be able to wire up the HEI module in the exact way of the factory ignition module but without the resistor wire. This would provide the computer to still control ignition timing.

The "Ignition Maint" light was only used on the cars with the Iron Duke, and possibly the AMC 2.5, but was not used on models with the 258.
Title: Re: Feed back carb, hei ignition??
Post by: carnuck on June 10, 2013, 07:39:27 PM
     So When you say turn it on cold You mean key on but don't start then remove the connector from the stepper on the back of the carburetor? The distributor that I am using will be the early H.E.I. Another question I have is, when does the light on the dash for service emissions come on? I have never seen this light illuminated. Thank you both for the information I will be doing this tomorrow or later this week.

Yes. Key on cold but not running. Pull the plug and be done with it.
Title: Re: Feed back carb, hei ignition??
Post by: BenM on June 11, 2013, 01:50:06 PM
Realistically, you should be able to wire up the HEI module in the exact way of the factory ignition module but without the resistor wire. This would provide the computer to still control ignition timing.

Ford, GM, and MSD all use the same trigger system. It should work just fine. In fact there are write-ups on using a HEI module and remote coil with the stock (or aftermarket) distributor.