 Diagnoise my snail reading needed |
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| bandjoey |
 Dec 18 2023, 05:12 PM
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#1
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bandjoey  Group: Members Posts: 4,926 Joined: 26-September 07 From: Bedford Tx Member No.: 8,156 Region Association: Southwest Region  |
73 2.0 Delortos
Last major tune was about 9,000 miles ago and running like a champ until today and it felt like a slight misfire. Just to see if one cylinder was reading different I used the snail on the stacks and found these readings. #1 reading 7 and vibrating the needle up and down 1 number #4 #5 solid #2 #5 solid #3 reading 7 and vibrating the needle up and down 1 number Due to equal vibrating readings on 1 & 3 could there be one thing causing this reading or am I hoping too much? |
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| VaccaRabite |
Dec 18 2023, 08:11 PM
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#2
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En Garde! Group: Admin Posts: 13,456 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
I'm guessing that your control arms for the carbs are on 1 and 3, not 2 and 4?
I bet you need to tighten up your linkage. I bet it has vibrated a bit loose, and is transferring load to the throttle plates on 1 and 3 giving them a little flutter. Or you have vibrated into a slight air leak. Either way, things needs to be tightened up. Once that is tightened, you can balance the barrels with the balance adjuster nuts, if needed. Zach |
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| r_towle |
Dec 19 2023, 03:49 PM
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#3
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Custom Member Group: Members Posts: 24,585 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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I agree 100% with Zach.
What I would suggest is get it warm. Get it to idle. Remove the linkage that connects both carbs to each other, and to the gas pedal. Check them, while at idle, no revving. Adjust using the individual carb adjustment. Then put (adjust) all the linkage back on to ensure it does not move the carbs at all. For this reason, I am a huge fan of Chris Foleys cable linkage... Rich |
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| bandjoey |
Dec 19 2023, 11:55 PM
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#4
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bandjoey Group: Members Posts: 4,926 Joined: 26-September 07 From: Bedford Tx Member No.: 8,156 Region Association: Southwest Region |
Thanks... I would not have thought of the linkage but it makes sense.
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