B boostedtsiawd Joined Mar 27, 2011 Messages 342 Location Chicago May 18, 2015 #1 I noticed in hotter temps my car idle drops a bit but when its colder outside its a bit higher is this normal for a old car? I have a 88 Nissan 200sx.
I noticed in hotter temps my car idle drops a bit but when its colder outside its a bit higher is this normal for a old car? I have a 88 Nissan 200sx.
Z zach1900 Joined Jan 26, 2015 Messages 1,460 Location ME May 18, 2015 #2 Yes it's normal, though probably your imagination, it goes into lower idle faster in hotter weather, these engines run in a very narrow water temp.
Yes it's normal, though probably your imagination, it goes into lower idle faster in hotter weather, these engines run in a very narrow water temp.
N NHGUY Joined Oct 9, 2011 Messages 5,090 Location USA May 18, 2015 #3 I have an old truck that idles way faster when hot,vs when its cold...
H hansj3 Joined Oct 8, 2014 Messages 491 Location SSP mn May 18, 2015 #4 Yes on a car that old there will be a cold idle phase of warm up. Kind of like an enrichment circutin some carbs Maybe yours isn't working Last edited: May 18, 2015
Yes on a car that old there will be a cold idle phase of warm up. Kind of like an enrichment circutin some carbs Maybe yours isn't working
4 4wheeldog Joined Apr 23, 2012 Messages 1,463 Location East Mountains, NM May 18, 2015 #5 Electrical load will boost the idle even in cars of that vintage. When it cold, you are likely to have fans/lights/wipers on, all of which will raise load enough to bump the idle up.
Electrical load will boost the idle even in cars of that vintage. When it cold, you are likely to have fans/lights/wipers on, all of which will raise load enough to bump the idle up.
3 3800Series Joined Aug 2, 2014 Messages 1,535 Location Gulf Coast, MS May 18, 2015 #6 Engines run rich when cold. Once they warm up the computer will lower the fuel (at idle) which will result in lower rpm. Car sits at 1100 rpm when cold but around 700 when warmed up to operating temp. But I normal crank the ac when I get in so that probably contributes to higher rpm during cold starts.
Engines run rich when cold. Once they warm up the computer will lower the fuel (at idle) which will result in lower rpm. Car sits at 1100 rpm when cold but around 700 when warmed up to operating temp. But I normal crank the ac when I get in so that probably contributes to higher rpm during cold starts.
L Lubener Joined Jan 22, 2011 Messages 9,557 May 18, 2015 #7 Originally Posted By: NHGUY I have an old truck that idles way faster when hot,vs when its cold... Might check for a vacuum leak.
Originally Posted By: NHGUY I have an old truck that idles way faster when hot,vs when its cold... Might check for a vacuum leak.