Questions related to the engine running without advancing the throttle.
Questions tagged [idle]
195 questions
25
votes
7 answers
How slow ( not zero) can a car engine run without hurting engine and saving on fuel
New cars have stop-start system (even though this has been available for a long time). My question is: why are car companies emphasizing shutting the engine down at a traffic light, rather than making the engine run at close to zero RPM (but…
Raj
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19
votes
1 answer
Vibration at idle, much worse after warm
My car is a 2001 Pontiac Firebird with a V6 (3800 Series II (L36)) and a manual transmission.
These are all at a stop:
When the car is cold, I don't feel too much vibration when sitting in it. (I mostly notice the vibration in the seat.) However,…
icor103
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14
votes
3 answers
How does the transmission not strip itself when applying the brake?
Quick question bugging me: Obviously the car moves forward when neither applying the brake nor the accelerator.
How does this not damage the transmission when the brake is pressed?
I first thought that perhaps the transmission releases when the…
TrottingGoatParade
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13
votes
1 answer
1987 Dodge D150 High Idle and Dieseling
Truck is the high altitude/California emissions model, 318.
Carburetor has been replaced with a 4 barrel Holley 4160 I believe, although it might be a 4150, intake manifold was replaced to fit the new carb, nothing fancy though.
Truck was tuned and…
E-Rock
- 131
- 3
11
votes
1 answer
Occasional trouble idling
I have a 2004 Subaru Forester XS (manual transmission). A few times a month, the engine will not start or idle without feathering the accelerator. During normal driving, everything works fine until I press the clutch in or put the car in neutral. …
BlakeG
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10
votes
4 answers
Car stalls when coming to a stop except when in neutral
My 2015 Subaru legacy has been having some issues coming to a stop. The car first stalled after coming to a stop 3 weeks ago and then never happened again until today. The first time it happened once, then I couldn’t start the car until I gave it…
eews
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10
votes
2 answers
Why Have More Than One IAC Type Device On an Engine?
I've had two Mazda's, a 97 323 and 98 626. On both these car's engines there was only a single IAC mounted on top of the throttle body, and no other device for adding air flow on the intake side.
However, on my 99 Nissan Almera with the GA16DE…
Robert S. Barnes
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9
votes
1 answer
Idle gets stuck at 2000RPM
I have a friend with a 1989 Toyota Camry Wagon and the idle occasionally gets stuck at 2000RPM. In order to get the idle unstuck, we have to press down the gas, kick up the revs and then it will settle back down to a normal idle around 1000RPM.
I…
Elliot B.
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9
votes
2 answers
Do you need a charged battery for a car to Idle?
I am planning to acquire a 2001 Mitsubishi Lancer 1.5. The car runs perfect but it has an almost flat battery. Even the horn doesn't work unless the car is driven around. (No starting Problem though weirdly)
The problem:
The car only idles for…
Shobin P
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8
votes
3 answers
Does idle RPM increase when there is heavy load on the electrical system?
I am thinking about installing a 500w halogen (HDX brand) on the roll bar in my jeep as the dome light because often I work in the back when it is dark or when I would like more light. The 500w light will be drawing about 40amps from my car's…
Sponge Bob
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8
votes
2 answers
Why do engines run badly below the normal idle speed?
When the engine speed in my petrol car drops below about 650-700 RPM - the normal idle speed - it starts to shake and judder. This could be because say, I didn't give enough gas when pulling away.
Why does it run really badly and shake?
Also, what…
George
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7
votes
2 answers
Rough idle problems on 93 Miata
The engine idles fine when cold then drops to about 800 and I have no problems at all except maybe inconsistent idle (goes up and down but not by much) although when I turn off the engine and then start it again while it is still warm I get the…
method
- 2,770
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6
votes
4 answers
Engine start is OK but dies when applying throttle
Triumph Tiger 900 (1994)
The engine starts fine and idles with choke. When I reduce choke and try throttle it just dies. Regardless of choke position, when I throttle, the engine dies. Thus, I cannot ride it at all.
After 5+ minutes it was already…
Hpoonis
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6
votes
2 answers
Really high idle after tightening spark plugs
I had a very nasty tick in my engine after doing a bunch of work to it, I just redid my chain tensioner which went a long way to fixing it, then I found that spark plugs could cause a tick, so I tightened them. It fixed the problem.
However, the…
Sam
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6
votes
1 answer
High vacuum pressure on idle after timing gear and chain replacement
I just got my 1980 Chrysler LeBaron 318 V8 back from the mechanic, who replaced the timing gears and chain, which were the originals and very worn.
Soon after leaving the mechanic, I noticed my vacuum pressure gauge was reporting high vacuum…
sehcheese
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