Idle RPMs
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- 356 Fan
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Idle RPMs
1963B Coupe Normal; running Weber 40s with Bosch 050 distributor. Suddenly the idle speed reduced itself to about 300 RPMs. Motor quits at that RPM. Wondering is there is a relatively simple adjustment to be made to increase the idle speed to around 750 RPMs?
1963B (T6) Coupe
1987 3.2 Carrera
1985 FJ60 Landcruiser
1993 Miata
1987 3.2 Carrera
1985 FJ60 Landcruiser
1993 Miata
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- 356 Fan
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Re: Idle RPMs
Each carb has an stop screw which adjusts the carb's idle RPM; For an balanced idle, you must use a Unisyn, or Sychronometer (gage).
- Doug McDonnell
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Re: Idle RPMs
But if everything was fine with stable idle and you suddenly developed this then there is a reason to be found. Distributor plate was sticking for a long time and finally went back to base? Doubt it. Maybe a partially clogged idle jet? More history would help.
1965 356C 2000 BMW 740i Sport 1967 Honda CL77 There is never enough time to do it right, but always enough time to do it over.
- Neil Bardsley
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- 356 Fan
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Re: Idle RPMs
Jim,
Check your dwell-as the rubbing block on the points wears the dwell increases and the timing becomes retarded-a .004 reduction in point gap will change the timing by 3 degrees.
Check your dwell-as the rubbing block on the points wears the dwell increases and the timing becomes retarded-a .004 reduction in point gap will change the timing by 3 degrees.
- Ron LaDow
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Re: Idle RPMs
I keep beating this horse, but it's sill not dead:
DO NOT adjust the carbs first.
Do a complete tune up in the proper sequence, and adjust the carbs to suit what the specific values (valves and ignition) want.
DO NOT adjust the carbs first.
Do a complete tune up in the proper sequence, and adjust the carbs to suit what the specific values (valves and ignition) want.
Ron LaDow
www.precisionmatters.biz
www.precisionmatters.biz
- Neil Bardsley
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Re: Idle RPMs
That is what the link I posted suggestsRon LaDow wrote:I keep beating this horse, but it's sill not dead:
DO NOT adjust the carbs first.
Do a complete tune up in the proper sequence, and adjust the carbs to suit what the specific values (valves and ignition) want.
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- 356 Fan
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Re: Idle RPMs
Jim,
Did you ever solve your low idle problem?
Did you ever solve your low idle problem?
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- 356 Fan
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Re: Idle RPMs
Thanks for the responses. Car has been sitting in the garage and I haven't had time to attend to it. I really do not have the skills and am attempting to get it into my wrench for a couple of issues, the low idle RPM being one of them. In the meantime, I am wondering whether I can adjust the carb linkage to accomplish a higher idle RPM? This would be only a temp fix until the issue can be addressed further. Thanks again.
1963B (T6) Coupe
1987 3.2 Carrera
1985 FJ60 Landcruiser
1993 Miata
1987 3.2 Carrera
1985 FJ60 Landcruiser
1993 Miata
- Ron LaDow
- 356 Fan
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- Location: San Francisco
Re: Idle RPMs
Jim,
If you bandaid it, it just makes the proper adjustments more difficult. Why not just get it to him and let him to the correct process?
If you bandaid it, it just makes the proper adjustments more difficult. Why not just get it to him and let him to the correct process?
Ron LaDow
www.precisionmatters.biz
www.precisionmatters.biz
- Wes Bender
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Re: Idle RPMs
+1 on what Ron says. You would be adding a complication if you adjusted the linkage without knowing that it was the problem. You indicated the idle suddenly dropped to the 300 range. I'd let the wrench know everything you've told us and let him find out what took place. I'm assuming that your wrench is well qualified in these fine cars.
Some days it's just not worth chewing through the restraints.....