idle fast when cold

NeX

You're after my robot bee
Club Member
hi all, my little micra has a facelift 1.3 engine in it when it was originally a pre facelift LX

the car idles at about 1700rpm when cold.

anyone had this problem and know of a quick fix? the car is fine when it gets warm.

thanks ppl
 

Napster

And the Wide Green Bug
whoops, i meant 1400!! lol!!!
no it drops to around 500 mate. i can adjust the throttle cable though to up the idle
 

maddave

Club Member (Trial)
The idle should be a lot higher when cold. As long as it isn't idling like that when warm then thats ok.

does it have air con?
 
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NeX

NeX

You're after my robot bee
Club Member
thanks guys,

its alot higher than my other car which runs at 1200.

the car doesn't have A/C but it does have powersteering, the MOT said it had a lambda reading which was right on the limit.

i put the engine so i don't trust it at all lol.

when its warm its about 500 which is fine...
 

frank

Club Member
nex

on mine there,s a thermostat valve that turns a cam which holds the throttle open when cold, try adjusting that
and a black plastic screw on the other side to adjust the idle mixture
 
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NeX

NeX

You're after my robot bee
Club Member
nex

on mine there,s a thermostat valve that turns a cam which holds the throttle open when cold, try adjusting that
and a black plastic screw on the other side to adjust the idle mixture

cool thanks mate :D

i think i know the bit you mean, but i am just wondering why it got like that in the first place, cos i am sure when i put the engine in it ran fine.
 

frank

Club Member
nex

if you tap a multimeter into the middle lambda wire, you can set the idle mixture on that plastic screw (very short allen key needed)
 
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NeX

NeX

You're after my robot bee
Club Member
nex

if you tap a multimeter into the middle lambda wire, you can set the idle mixture on that plastic screw (very short allen key needed)

ah cool :D i will give that a try,

what does the lambda actually read?
 

frank

Club Member
nex

0 to 1 volts, .5 is what your aiming for but the stock narrowband lambda,s are very sensitive and they swing a fair bit
on gas i aim for .7/.8v foot down, .5 cruising and it drops right down on lift
 
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NeX

NeX

You're after my robot bee
Club Member
nex

0 to 1 volts, .5 is what your aiming for but the stock narrowband lambda,s are very sensitive and they swing a fair bit
on gas i aim for .7/.8v foot down, .5 cruising and it drops right down on lift

ah i see :D that kind of info should be a sticky cos that is really useful :D thanks
 
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NeX

NeX

You're after my robot bee
Club Member
hhmmmm true but this engine is from a facelift with only 40k on the clock it should still be ok
 
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