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4180C Idle Mixture Setting Procedure?

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85lebaront2

Re: 4180C Idle Mixture Setting Procedure?

Administrator

Roughly, when the emission systems first came East, we had a combustion meter and they had to be set to I think it was 15:1 at idle, propane enrichment came later with catalytic converters as you couldn't get a mixture reading through them. To do the mixture setting the Thermactor pumps need to be disconnected and the lines to the head and or manifolds capped so you are reading actual A/F ratio. If it has to be tested, do a fresh oil change and maybe a PCV valve refresh.

Damn glad I do not have that crap here!

Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

Gary Lewis

Re: 4180C Idle Mixture Setting Procedure?

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By "roughly" did you mean my guess of 1 turn lean from max vacuum is close? That was just a wild guess, but I know they had to be very lean to pass.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

85lebaront2

Re: 4180C Idle Mixture Setting Procedure?

Administrator

Problem is if it is too lean NOX goes up and those beasts run hot anyway which contributes to it. Unfortunately nothing either of us has found shows the standards for the over 8500 CA requirements.

Bill AKA "LOBO" Profile

7thSon

Re: 4180C Idle Mixture Setting Procedure?

Gonna try bribing the dealer tech with donuts and/or ice cream. Prolly won't be able to do it till beginning of next week (I work next 4 days). I'll let you know how it goes... wish me luck!

On Wed, Jun 20, 2018, 8:06 PM 85lebaront2 [via Bullnose Enthusiasts] <[hidden email]> wrote:

Problem is if it is too lean NOX goes up and those beasts run hot anyway which contributes to it. Unfortunately nothing either of us has found shows the standards for the over 8500 CA requirements.
"Getting old is inevitable, growing up is optional"
Darth Vader 1986 F-350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator
Wife's 2011 Flex Limited
Daily Driver 1994 Taurus LX
Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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NAML

1986 F250 XLT Lariat/104,000 miles
460CID/Holly 4180C (CA emmissions)/
C6/2WD/8600 GVWR

Gary Lewis

Re: 4180C Idle Mixture Setting Procedure?

Administrator

Good luck! And, let us know how it goes.

Gary, AKA "Gary fellow": Profile

vjsimone

Re: 4180C Idle Mixture Setting Procedure?

In reply to this post by 7thSon

http://www.garysgaragemahal.com/holley-4180c.html

Click on "Ford's Service Manual"

Vinny... "Do All Scheduled Maintenance Prior To Troubleshooting" "Resolve All Known Issues Prior To Troubleshooting"

85lebaront2

Re: 4180C Idle Mixture Setting Procedure?

Administrator

There is still no idle mixture setting procedure. If I have the 1985 or 86 big emission manual I will see if it has anything. I know they are a pain to adjust due to the location on the mixture screws.

Bill AKA "LOBO" Profile