2001 Hyundai Elantra

Tiny
AMY88
  • MEMBER
  • 2001 HYUNDAI ELANTRA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 180,000 MILES
Hey,
When I turn my car on it reeves high then low a few times when I start it. Its like a ghost is pushing on the peddle. It is also idling high do you have any idea to what it could be? I have seen a mechanic about this but they say the computer isn't picking up any errors and they cant seem to find out why it is doing it
Friday, October 15th, 2010 AT 6:57 AM

7 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Amy88,

The idling system is not working correctly. Check the coolant level in radiator, throttle body and Idle Air Control valve. Some cleaning might be required.
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Sunday, October 17th, 2010 AT 10:35 AM
Tiny
AMY88
  • MEMBER
  • 4 POSTS
Hey KHLow2008,
The coolant level in my car is normal, the throttle body has been cleaned out and check and also the Idle Air Control valve has been replaced but it is still idling high and fluctuating between high and low when turned on.
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Sunday, October 17th, 2010 AT 7:14 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Is the replaced IAC new or used?

Have you checked for vacuum leakages?

Was the throttle plate stopper tampered with?
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Monday, October 18th, 2010 AT 6:11 AM
Tiny
AMY88
  • MEMBER
  • 4 POSTS
The IAC was check and cleaned (used)
here is the list of things that have been done allready
. Scan tool code test
. Comp test
. Vacuum leak test
. Checked cam timing
. Changed plugs
. Checked Leads
. Checked coils
. Checked T.P.S
. Checked Tc-mp sensors
. Checked Earth
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Tuesday, October 19th, 2010 AT 3:41 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
The idling speed is too high and it is due to excessive getting past the throttle body.

1. Faulty IAC. Make a gasket to block the IAC air passages and start vehicle to test.

If the idling speed is still high, it is not the fault of the IAC. There is a vacuum leak somewhere. Check if the throttle plate is fully closed. When the throttle plate stopper is tampered with, it would not close fully resulting in surging.

Check the PCV valve.
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Tuesday, October 19th, 2010 AT 6:41 AM
Tiny
AMY88
  • MEMBER
  • 4 POSTS
Hey sorry I have taken so long to reply.

The throttle plate is working in order and is fully closed.

I am having the intake gasket taken apart and looked at cause we cant seem to find any vacuum leaks any where else. Dad says looks like someone has tried to bodge it up with some sorta Elastic or some sorta gap filler around the edges. Will let you know how it goes

Thanks for the help much appreciated
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Monday, October 25th, 2010 AT 6:08 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You're welcome.

Hope to hear good news from you next time.
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Tuesday, October 26th, 2010 AT 7:46 AM

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