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610 Won't Idle Right!!


Zeusimo

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So I Installed A Rebuilt 75 710 L20b Carb, Plugged The Holes, Removed Idle Cam, Choke, And Anti-Diesel Valve.

Set Timing To 12BTDC, Adjusted Valves, New Kyosan Fuel Pump, New Gapped Plugs 0.030, And Points 0.020, Dwell No Clue...

Bled Air Out Of Cooling System, Removed Secondary Points, Rebuilt Top-End U67 Peanut U20 Cam

Everything On Motor Lines Upto TDC 11:28, Cam/V-Notch, 2 On Sprocket, New Beck/Arnley Chain

 

So Car Starts Up Fine And Doesn't Missfire

Carb Squirts Strong Gas When Off For Only 2-3 Pumps When Off

It Is Very Responsive When Giving It Gas

But It Doesn't Idle Right Even When Hot

Goes From 800-1200 Up And Down Every 5 Secs?

 

Not Sure If This Is Right

c751664e.jpg

 

I Did Have A Holley On It Before.. And It Ran GOOD

But It Seems Too Much For Even A V8?

25769c80.jpg

396ec166.jpg

 

I Much Rather Have A Hitachi/Weber

 

I Still Need To Find/Install PCV Hose To Intake

Will L20b Carb Not Work With L18?

 

Video:

http://www.youtube.com/watch?v=UMANgiC1CeQ

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Looks like the choke wire and the idle cut solenoid not wired up.

 

 

Other than that maybe a vacuum leak. Grab the carb and try to twist it. If it moves it may not be mounted tightly or the internal screws between the base and the body are loose.

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make sure that the screws in the base of the carb are tight and are not stripped my stock hitatchi was like that the base screw closest to the throttle linkage was stripped and would never tighten so as i worked the throttle the carb would actually seperate creating a huge vacuum leak

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@Bonvo

Same Thing With That Screw, Didn't Even Idle Before

I Had To Cut It Down Almost Three Threads To Get It To Tighten

Also Used Two Gaskets, One Before And After The 1/16" Spacer

 

 

Plugged The Vaccum Lines With Tighter Hoses And It Helped Alittle Bit

But Tommoz I Will Try To Get A Torque Wrench And Retorque Intake/Exhaust

Yeah...

BTW What Is Intake/Exhaust Torque Spec?

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So I Retorqued Intake/Exhaust

 

Checked For Leaks W/ Starting Fluid

 

Squirted A Ton Of Carb Cleaner In The Carb When Runing

 

Now Idles Reved A Few Times

Idled And Died After A Min Cuz I Ran Out Of Gas

 

Gonna Go Get Some More Gas But I THINK

Everything Is Ok

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