SPONSORED LINKS

What would make my Tiburan idle speed fluctuate from 800 RPMs to 4000 RPMs.

Tiny
EX3200
  • MEMBER
  • 2003 HYUNDAI TUCSON
  • 118,000 MILES
I installed a used 5 speed transmission in my tiburon and when I first started it the idle problem was there, it was fine when I started the trans. Replacement, I had replaced the tach/speedometer gear and sensor in the replacement tran. With the one from my old tran. Also I had the ignition switch on when I hooked up the battery post. Would a surge from hooking up the battery mess up a sensor that controls idle? Any help would be greatly appreciated.
SPONSORED LINKS
Sunday, July 8th, 2012 AT 1:18 AM

1 Reply

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
It probably would not affect the Idle Air Control Valve which is a servo that controls idle. It would more likely mess up the ECU if you had the harness hooked up, but then you would more than likely have other issues. I would check for vacuum leaks especially around EGR at exhaust.
To help here is a walk through diagnostic for your situation. I think pulling the trouble codes will be important. Any Advance Auto or Auto Zone will do this for free. You do not have to have a check engine light to have a trouble code present which would really help eliminate a lot of possibilities.
Just use the link below;

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

Try this one to;

https://www.2carpros.com/articles/engine-surges
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, July 8th, 2012 AT 1:35 AM

Please login or register to post a reply.

Related Engine Idle Erratic Content

Vacuum Leak Test and Repair
VIDEO
Vacuum Leak Test and Repair
Instructional repair video
Idling High
GUIDE
Idling High
Intermittent sensor failure or shorting can cause the computer to act strange with unusual side effects, these problems are particularly tough to diagnose. The computer...
VIEW MORE

Sponsored links