Idle drops to 500rmp from normal 650rpm?
#1
Idle drops to 500rpm from normal 650rpm?
All of a sudden yesterday sitting at stop lights, or just idling, the idle RPM on my 2000 Max would all of a sudden drop to 500 RPM with a slight noticeable shaking of the engine... from its normal 650 idle speed. Any ideas what I should clean or check to fix this? I"m going to try cleaning the MAF, TB, check vacuum hoses... etc. It just all of a sudden started doing this.
The car drives normal otherwise and when I come to a stop it'll idle at 650 for a bit and then it'll drop down to 500. weird...
anyone have experienced this?
My coils have been replaced. And so has the spark plugs.
The car drives normal otherwise and when I come to a stop it'll idle at 650 for a bit and then it'll drop down to 500. weird...
anyone have experienced this?
My coils have been replaced. And so has the spark plugs.
#3
nope, failed to mention no ac running. When the ac is on, the idle actually supposed to speed up.
But I've fixed the problem. It turns out I had forgotten to put the oil filler cap back on two weekends ago when I changed the oil. The bad but not too bad is I drove 28 miles with the cap off and good thing it didn't fall and get lost. No oil splatters either... I changed the oil 2 Saturdays ago and I guess forgot to put the cap on. But the car sat until this past Sat when I drove it and yesterday and today. The idle drop started this past Saturday.
So, that was the cause then. Man I was wondering what's up. Good thing I wasn't driving in too dusty or rainy weather this past couple of days.
But I've fixed the problem. It turns out I had forgotten to put the oil filler cap back on two weekends ago when I changed the oil. The bad but not too bad is I drove 28 miles with the cap off and good thing it didn't fall and get lost. No oil splatters either... I changed the oil 2 Saturdays ago and I guess forgot to put the cap on. But the car sat until this past Sat when I drove it and yesterday and today. The idle drop started this past Saturday.
So, that was the cause then. Man I was wondering what's up. Good thing I wasn't driving in too dusty or rainy weather this past couple of days.
#7
I got similar problem, but with oil cap on. lol
Here's what happens: when the engine is cold I have to keep it over 2500 rpm for 15 - 20 seconds after it's just started. Otherwise it will stall within those 15-20 secs. if the engine is hot, there's no problem starting it.
Feel free to post your suggestions.
Here's what happens: when the engine is cold I have to keep it over 2500 rpm for 15 - 20 seconds after it's just started. Otherwise it will stall within those 15-20 secs. if the engine is hot, there's no problem starting it.
Feel free to post your suggestions.
#8
Originally Posted by DrKlop
I got similar problem, but with oil cap on. lol
Here's what happens: when the engine is cold I have to keep it over 2500 rpm for 15 - 20 seconds after it's just started. Otherwise it will stall within those 15-20 secs. if the engine is hot, there's no problem starting it.
Feel free to post your suggestions.
Here's what happens: when the engine is cold I have to keep it over 2500 rpm for 15 - 20 seconds after it's just started. Otherwise it will stall within those 15-20 secs. if the engine is hot, there's no problem starting it.
Feel free to post your suggestions.
#10
Originally Posted by DrKlop
how can coolant temp sensor affect it?
#11
Originally Posted by njmodi
So replacing the filler cap fixed the idle problem... anyone care to explain how this works?
#12
Originally Posted by young1976
nope, failed to mention no ac running. When the ac is on, the idle actually supposed to speed up.
But I've fixed the problem. It turns out I had forgotten to put the oil filler cap back on two weekends ago when I changed the oil. The bad but not too bad is I drove 28 miles with the cap off and good thing it didn't fall and get lost. No oil splatters either... I changed the oil 2 Saturdays ago and I guess forgot to put the cap on. But the car sat until this past Sat when I drove it and yesterday and today. The idle drop started this past Saturday.
So, that was the cause then. Man I was wondering what's up. Good thing I wasn't driving in too dusty or rainy weather this past couple of days.
But I've fixed the problem. It turns out I had forgotten to put the oil filler cap back on two weekends ago when I changed the oil. The bad but not too bad is I drove 28 miles with the cap off and good thing it didn't fall and get lost. No oil splatters either... I changed the oil 2 Saturdays ago and I guess forgot to put the cap on. But the car sat until this past Sat when I drove it and yesterday and today. The idle drop started this past Saturday.
So, that was the cause then. Man I was wondering what's up. Good thing I wasn't driving in too dusty or rainy weather this past couple of days.
so over 2 weeks you only drove 28 miles? Im jealous.
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Unclejunebug
5th Generation Maxima (2000-2003)
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04-02-2016 05:42 AM