SPONSORED LINKS

Idle speed increasing

Tiny
YOGESHKOSHTI
  • MEMBER
  • 2004 CHEVROLET OPTRA
Hello,

I have purchased a 2nd hand chevy optra 2004, it is running fine but sometimes when I turn on AC the RPM raises too high (3500RPM) and won't come to normal position, even I turn off the AC still the idling is too high.I don't know how to set the RPM of it.
It is creating a problem for me while going for a drive.
Can you please suggest me how to set the idle time for my car?

Thanks in Advance!
Yogesh
SPONSORED LINKS
Monday, June 14th, 2010 AT 12:29 AM

12 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny.

I would service the throttle body. I have attached two pictures and a tutorial for you to view. Hope this helps and thanks for using 2CarPros.

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/engine-idles-too-high

Please run down these guides and report back.

Images (Click to make bigger)
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Saturday, September 29th, 2018 AT 8:47 PM
Tiny
JUDDYZAD23
  • MEMBER
  • 3 POSTS
Only this throttle body if I turn the AC comes to low 400 rpm if turn off the AC comes to normal 800 to 900.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
+2
Saturday, September 29th, 2018 AT 9:54 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Is this what the throttle body on your car looks like? What size is the engine?
Danny-
Was this
answer
helpful?
Yes
No
+1
Saturday, September 29th, 2018 AT 10:10 PM
Tiny
JUDDYZAD23
  • MEMBER
  • 3 POSTS
1.6 Chevrolet Optra 2004.
Was this
answer
helpful?
Yes
No
Saturday, September 29th, 2018 AT 10:25 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

I have attached a picture of what the Idle Air Control Valve looks like. Do you see this located on your throttle body? I have also attached a relearn procedure. Hope this helps and thanks again for using 2CarPros.
Danny-
Images (Click to make bigger)
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Sunday, September 30th, 2018 AT 1:44 AM
Tiny
JUDDYZAD23
  • MEMBER
  • 3 POSTS
Thanks for advice worked perfect!
Was this
answer
helpful?
Yes
No
Sunday, September 30th, 2018 AT 2:48 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
You are welcome!
Thanks for using 2CarPros.
Danny
Was this
answer
helpful?
Yes
No
+1
Sunday, September 30th, 2018 AT 4:26 AM
Tiny
ROSSZAISTER
  • MEMBER
  • 2 POSTS
  • 2004 CHEVROLET OPTRA
  • 174,000 MILES
Hi. I'm driving 2004 Optra 1.8LT Automatic. Last time I'm having the problem with fluctuated RPM during cold engine. So I brought the car to the workshop and they clean-up my throttle body (disconnect all parts related including IAC, all socket and tube) and the problem been solved

But I'm having new problem day after that. For the past 7 years, my RPM only at 800 rpm at all conditions (either when I put on gear parking/neutral or stop at traffic light and change it to neutral). But currently, the RPM high up to 2000 rpm during parking/neutral, especially when I change my gear to neutral while engines running/waiting at traffic light, or waiting my sons at his school.

How to solve it? I want it back as before, at 800 RPM. Idle Air Control Valve problem? Throttle position sensor problem?
Was this
answer
helpful?
Yes
No
+1
Thursday, March 14th, 2019 AT 10:36 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Start by cleaning out the IACV and see what happens
Was this
answer
helpful?
Yes
No
+1
Thursday, March 14th, 2019 AT 10:36 AM (Merged)
Tiny
ROSSZAISTER
  • MEMBER
  • 2 POSTS
Thank you. Will do as per advice.
Was this
answer
helpful?
Yes
No
Thursday, March 14th, 2019 AT 10:36 AM (Merged)
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
No CEL?
Was this
answer
helpful?
Yes
No
Thursday, March 14th, 2019 AT 10:36 AM (Merged)
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
May need computer re program of throttle functions.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, March 14th, 2019 AT 10:36 AM (Merged)

Please login or register to post a reply.

Related Engine Idle High Content

VIEW MORE

Sponsored links