Mechanics

RPM ISSUE! HELP

2003 Hyundai Tiburon • 15,400 miles

I have a 2003 hyundai tiburon gt 6cyl with 154,000 miles. It it doing something strange. When I first drive it for the day it shudders a bit and when I take off slowly cause I live in a quiet residential neighborhood the rpms go low and all the dummy lights on the dash come on and the car dies but it starts right back up. Also when im driving at regular speeds onthe road the rpms go up and move like normal but then they will surge up real fast and then go back to normal. I just had a brand new battery put in, new air filter and the mass airflow sensor was cleaned. What could be the problem?
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Ilovepeircings69
August 13, 2012.




Have the IAC system checked and cleaned this may be all it needs, start here.

Mhpautos
Aug 13, 2012.
Do you have coolant losses issues?

KHLow2008
Aug 13, 2012.
No coolant issues that I know of. Like today when I first drove it, I have to keep my foot on the gas because if I let go, the rpms drop and it acts like it wants to die.

Tiny
Ilovepeircings69
Aug 13, 2012.
That sounds like an IAC fault so get it cleaned together with the throttle body.

KHLow2008
Aug 13, 2012.
Ok would the iac cause the rpm issue while driving too?

Tiny
Ilovepeircings69
Aug 13, 2012.
A fully opened IAC valve can make the engine rpm surge up to 3000 rpm if that helps.

KHLow2008
Aug 14, 2012.
Yes that helps, are these also signs of a bad engine or tranny?

Tiny
Ilovepeircings69
Aug 14, 2012.
No, this should be a control problem rather than mechanical failure.

KHLow2008
Aug 14, 2012.
Oh ok thank you. You have been a great help!
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Tiny
Ilovepeircings69
Aug 14, 2012.
You're welcome. Keep us posted on how it goes.

KHLow2008
Aug 14, 2012.

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