12a Idol
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#9
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Join Date: Aug 2006
Location: Canada
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im at like 500 or a little under and when i start it cold it stalls like 3 or 4 times and has a problem to get the rev up, when it FINALLY gets warm it is fine but still idols at 500 or below
#18
Check for vacuum leaks. Mine idles at 950 normally, but it'll die down to about 500 or 600 when the choke first pops back in or when I turn the headlights on (alt drag pulls it down). I believe it has a leak in one of the 1000000 lines in the engine bay.
Kev
Kev
#21
Wankle Waffles
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hahahahaha! go me!
Well today I tuned my carb, since I had only gotten my car running beautifully for the first time ever.
The lowest I was able to get it to idle was 1000RPM, no less. At least its a steady RPM and doesn't bounce around. I was merely playing with Idle Mixture and Idle Adjust screws. One of these days I'm going to get a vacuum gauge and wideband.
Well today I tuned my carb, since I had only gotten my car running beautifully for the first time ever.
The lowest I was able to get it to idle was 1000RPM, no less. At least its a steady RPM and doesn't bounce around. I was merely playing with Idle Mixture and Idle Adjust screws. One of these days I'm going to get a vacuum gauge and wideband.
#24
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500rpm is far too low when warm. Between 650 and 750rpm is best for a stock engine.
As you modify and port, then the idle revs need to be increased. A Bridgeport needs around 1200-1500rpm to be happy, but then you are not really interested in idle anyway. I have seen a hot PP which needed a minimum of 2,000rpm.
One of the few problems with a light flywheel is lack of smoothness at low revs which is traded of for high rpm performance. The reason Mazda went for such a heavy stock flywheel was to keep the engine turning over smoothly at low rpm so 650-750rpm was possibly sitting in traffic.
As you modify and port, then the idle revs need to be increased. A Bridgeport needs around 1200-1500rpm to be happy, but then you are not really interested in idle anyway. I have seen a hot PP which needed a minimum of 2,000rpm.
One of the few problems with a light flywheel is lack of smoothness at low revs which is traded of for high rpm performance. The reason Mazda went for such a heavy stock flywheel was to keep the engine turning over smoothly at low rpm so 650-750rpm was possibly sitting in traffic.