RPM idle - How low is too low?

[Crazyguy]

to high of idle on a 5spd car makes it hard to get it into gear when stopped. to low of rpm and well it dies *L*

[Shadow1]

lower idle - less fuel usage

higher idle - less vibration at stop lights(mostly auto users would be concerned about this)

yeah i get that vibration at the light. gets on my freakin nerves tho.

the bad thing about my car is one day it will idle between 700-800rpms then the next day it will be at like 400-500RPMs. any solutions?

i dont know know nothing about that propane thing he just talked about and i have not the slightest clue on how to find the leak...

[Otto]

Well if there was a leak at a gasket or line, the manifold vacuum will suck in the propane (or carb cleaner, or whatever you're using) and the engine will studder or rev. When it does, you've found a leak.

[Otto]

yea, but with everything on our cbs it is a biotch to find the problems

Yeah, I suppose sometimes enough is enough, and ya just go with what works.

[Otto]

to high of idle on a 5spd car makes it hard to get it into gear when stopped. to low of rpm and well it dies *L*

I've never had an issue getting it into gear, even when its 5F outside and engine is still at high idle. Then again, that is what the clutch pedal is there for.

[Otto]

Oh...I had to edit an earlier post. Idle is 700+/-50 with the IACV connected, not 750 like I first said.

[quickangel93]

u guys suck. mines is at 500 and its a nice idle, but my motor shacks a bit. like the steering wheel vibrates.

[jay82985]

get a smoke test done i just had it done it well find all leaks and it good the sprayeing cleaner is good 2 but the smoke test is the right way my car did the same thing and at cold at 1500 and after warm up at 500-600 which is good and what the car should be

[teglovinvtec]

650-750 warm 1200-1600 cold

[OptimusPrimeSr]

ok... so mine was sitting around 600-700 when I initially posted this thread. Just the other day, I bumped it to 750-800.

I had started to notice (while at 600-700) what can only be described as the occasional "shudder" when at stoplights and after initially cranking it. During the shudder, I would also slightly notice the headlights dimming...could be imagination.