Choke cover leak - help!

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boeing7873
Argentina
Posts: 166
Joined: Sun Dec 21, 2008 10:50 am
Location: Atlanta
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Choke cover leak - help!

Post by boeing7873 » Thu Nov 21, 2019 11:25 pm

So after 3 years of chasing an idle and low RPM issue, I got to the conclusion that it was related to a lack of fuel at that rpm range. Lack of fuel meant no power/stall until rpms reach 1300-1400, then all normal.

I managed to eliminate the stall by pulling out the idle mixture screws way out of range, about 2 to 2.25 turns out, and increase my idle fuel jets to 60 and decreasing the air restrictors (jets) to lowest.. I believe 110.

But winter came and symptoms started to show just a little, and I hate the smell of such a rich mixture. So I went again on the chase for a vacuum leak. Spraying all type of combustible gases and fluids did not help. RPMs never changed enough to recognize a leak.

So finally today I went with the other leak detector, the smoker. And... surprise! First, I thought my carb shaft/bushings were ok, well all except one that likes to smoke. But the real surprise was the smoke coming out of my choke covers. I changed the paper gaskets recently but obviously this must be an uneven base or cover.

Anyone with experience with this problem and what is the best solution?
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Jerome
CRJ Driver

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4x4Pinz
United States of America
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Location: arizona

Re: Choke cover leak - help!

Post by 4x4Pinz » Sat Nov 23, 2019 10:27 am

it happens when people over tighten the screws and bend the housing. A problem when folks take on their own work without knowing fully what they are doing (guilty as charged). I have learned over the years that when dealing with a soft metal and a gasket to keep the torque on the fastners to a minimum and use a gasket sealer. good thing is this plate can be made flat again and a new gasket with sealer used to fix the issue.

boeing7873
Argentina
Posts: 166
Joined: Sun Dec 21, 2008 10:50 am
Location: Atlanta
Contact:

Re: Choke cover leak - help!

Post by boeing7873 » Sun Dec 01, 2019 8:35 pm

Both covers were pretty bent. I heated them and with soft and small hammer and vice pressure, managed to get them quite close to flat, then a little sand and both look good now.
Now back to ground zero: re-jetting, re-idle, re-synch, re-timing... :{
Jerome
CRJ Driver

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