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Posted by: barebrad Apr 23 2014, 11:24 AM

Ok Guys and Gals!

I have a '73 2.0 with a Weber/Redline 32/36DGEV. (I know a single carb sucks, but this is a car my teenage son and I have been building for him. He needs to start buying parts.) My problem is that I can't get it to idle below 1500. If I slowly lower the idle, the engine just dies. I'm thinking my idle jet is too big or small. Recommended size? I have no vacuum lines hooked up either. Timing is spot on as well. What else should I look at????

So, Little help!

SOLVED: r_towle wins the chicken dinner! Fuel mixture screw was ALL the way in. purrs like a kitten now. THANKS TO ALL.

The group on this forum is GREAT!

Posted by: ThePaintedMan Apr 23 2014, 11:32 AM

Hi Brad,
High idle with carbs is almost always linkage or throttle plate related. A "too big" idle jet will only cause the car to run pig rich, not increase the actual idle itself.

You've done the correct steps by verifying timing first. Now I would double check the linkage to see if it's hanging up. Then check the secondary throttle body to make sure it's closing all the way. You can manually close that plate by pulling on the small lever attached to the main accelerator cable bracket.

Also, make sure that the vacuum ports are plugged. The 32/36 has a small vacuum nipple on one side of the carb and must be plugged in order to keep unmetered air from entering below the carb, which will increase the idle.

Report back after that. If the idle is still high, you'll need to pull the carb off and visually inspect the throttle plates to make sure they're closing all the way.

Posted by: RonnieJ Apr 23 2014, 11:34 AM

QUOTE(barebrad @ Apr 23 2014, 01:24 PM)

Ok Guys and Gals!

I have a '73 2.0 with a Weber/Redline 32/36DGEV. (I know a single carb sucks, but this is a car my teenage son and I have been building for him. He needs to start buying parts.) My problem is that I can't get it to idle below 1500. If I slowly lower the idle, the engine just dies. I'm thinking my idle jet is too big or small. Recommended size? I have no vacuum lines hooked up either. Timing is spot on as well. What else should I look at????

So,

Little help!

Run a 55 in the primary. Turn the idle jet in till it starts to stumble and then back out to best lean condition and then adjust your idle. I ran a single carb and was about 1 1/2 turns out on primary.

Posted by: RonnieJ Apr 23 2014, 11:37 AM

QUOTE(ThePaintedMan @ Apr 23 2014, 01:32 PM)

Hi Brad,
High idle with carbs is almost always linkage or throttle plate related. A "too big" idle jet will only cause the car to run pig rich, not increase the actual idle itself.

You've done the correct steps by verifying timing first. Now I would double check the linkage to see if it's hanging up. Then check the secondary throttle body to make sure it's closing all the way. You can manually close that plate by pulling on the small lever attached to the main accelerator cable bracket.

Also, make sure that the vacuum ports are plugged. The 32/36 has a small vacuum nipple on one side of the carb and must be plugged in order to keep unmetered air from entering below the carb, which will increase the idle.

Report back after that. If the idle is still high, you'll need to pull the carb off and visually inspect the throttle plates to make sure they're closing all the way.

Good catch...I forgot about the vacuum port, I had mine connected to the the vacuum canister on the distributor.

Posted by: Bruce Hinds Apr 23 2014, 11:55 AM

You mentioned the timing, but did you check the point gap?

Posted by: r_towle Apr 23 2014, 12:39 PM

Timing
Sticky advance plates in the distributor
Vacuum leak
Carb linkage
To rich, flooding at lower idle.

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