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Old 03-26-2007, 08:39 AM   #1
dave2953
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Stumble

My truck has a stumble at around 1000 RPM up to 2000 RPM. It does this while driving and in park. It takes off fine from a stop, but while driving slowly (5-10mph) it stumbles. It's fine at higher speeds, and just started this yesterday. Truck has 305 w/ 2bbl Rochester. Carb was rebuilt 1 month ago. I heard of similiar symptoms being caused by a bad module?? Any ideas?
Thanks in advance for your help!
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Old 03-26-2007, 02:41 PM   #2
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Re: Stumble

ttt
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Old 03-26-2007, 03:20 PM   #3
bryanw1968
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Re: Stumble

Doesn't sound like a module to me. They either work or they don't. If nothing changed and this just started happening I would tend to think it's fuel related. Maybe a lean condition. I guess there 'could' be something goofy going on in your distributor but I doubt it.
Good luck,
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Old 03-26-2007, 05:27 PM   #4
dave2953
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Re: Stumble

I forgot to mention that before this I was messing with the mixture screws. I was trying to adjust them and noticed that when I ran them all the way in that the truck still ran Would this be a vacuum leak??
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