Question about Hyundai Motor 2002 Elantra

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High Idle in park

Revs up to 800rpm in park, wants to die in drive

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  • rip_roy_troy Jul 02, 2009

    Yes there is a check engine light on, took it to the shop and they saw nothing so I ignored it, it has had a bit of a rough idle now this.

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I would check for a vaccum leak if there is not then you might suspect the idle air control or the mass air flow, is there a check engine light on

Posted on Jul 02, 2009

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2 Answers

Idles erratically, just changed rocker cover? gasket .now it revs high, not sure why, can I fix this suzuki swift 1990


rocker cover, i edited it for you. (my guess high is over 800rpm)?
hot engine or cold engine or both?
if hot is water temp, 180F? or stuck at 149F"? too low...
are you in neutral or drive? or park.?
which engine?. is it there are many sizes used on Swifts,
one if the largest number of engines on car.
my guess is a "G" engine family.
High idle is usually a vacuum leak,
is this a CARB or EFI engine?, (TBI, throttle body injection:?)
if it is EFI and if TBI
any air leaks will cause too fast hot idle.
here is the list: EFI only ! electronic fuel injected.
  1. Vacuum leaks. (hose left off, or now cracked?)
  2. sticking ISC, idle controller.
  3. TPS set wrong, and no longer has a working idle switch.
  4. ECU in Limphome (if CEL lamp (dash) glows running , bingo)
  5. PVC hose fell off.. sucking in fresh air , and higher idle.
more if you have answers to what your engine and driveline
consist of.




here is the lineup
GEN2 Swifts (the G family used)
1.0 L G10 (LP2) I3
1.0 L G10T (LS3) turbo I3
1.3 L G13A/BA (L72) 8V I4
1.3 L G13B/G13K 16V DOHC I4
1.5 L G15A 16V I4
1.6 L G16 16V I4

Aug 07, 2015 | Suzuki Cars & Trucks

1 Answer

Engine idle eratic


vacuum leaks .. high idle solenoid messed up..works with the defrost setting..

Dec 29, 2013 | Lexus RX 300 Cars & Trucks

1 Answer

Wire from computer to battery broke. We fixed the wire. Now the car starts then revs up and down then dies.


ECU has forgotten Throttle Position.

Turn ignition to KOEO for 30 seconds...you may hear throttle clicking fro a few seconds.

Turn ignition completely off . Now start engine...idle should be 800rpm and steady.

If not the Throttle Adaption needs setting ( or your throttle body is dirty of faulty....unlikely if it was OK before.)

Sep 12, 2011 | 2000 Volkswagen Beetle

1 Answer

Starts just fine but dies at idle. will keep running when stepp[ng on gas pedal


if the car runs fine at high revs, I suggest just turning the idle revs up 150ish, it could be a block cat converter, or restricted airflow making it die. but quick fix turn revs up 150rpm will do no harm and if it dies at higher revs, take it 2 the garage to see if they can find the thing.

Aug 15, 2010 | 2000 Toyota Camry

1 Answer

. ran with no prob , died. while Idle waiting for parking Hot day


Aside from having a faulty fast idle valve, you may have a leaking intake manifold gasket.

Jul 14, 2009 | 1992 Suzuki Swift

3 Answers

Car rev up and down at startup, also car jerks at release of gas


There is a vacuum leak somewhere in the intake system. A very common problem on these cars is a PCV valve that gets stuck open and replacing that first is very cheap. If that doesn't solve the problem, then you'll have to go hunting. Listening very carefully for a hissing sound in the engine compartment will often lead you to a hose that is off or a gasket that has failed. You can also spray small amounts of aerosol carb cleaner at suspect areas to confirm the leak. The engine will change revs when fed the carb cleaner.

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2004 stratus 2.7L Erratic idle, sometimes dies, sometimes revs at stops


hey-I have has this before different car but same - idle control valve is failing - computer at shop will pick this up on diagnostic

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