Engine, Intake, Exhaust Modifications to your Normally Aspirated Hyundai engine. Cold Air Intakes, Spark Plugs/wires, Cat back Exhaust...etc.

Timing Out Of Sync?

Thread Tools
 
Old Feb 21, 2009 | 04:50 PM
  #1  
bigfishmoney's Avatar
Thread Starter
Senior Member
 
Joined: Jul 2010
Posts: 730
Likes: 0
From: United States
Vehicle: 2001 Hyundai Tiburon
Default

Replaced the timing belt, new tensioners, ect
It starts but soon as it starts the RPMs fly up, taper down, then raise back up
Is this a timing issue? TY
Reply
Old Feb 21, 2009 | 04:59 PM
  #2  
Ericy321's Avatar
Senior Member
 
Joined: Mar 2006
Posts: 7,799
Likes: 0
Vehicle: 2001 Hyundai Tiburon
Default

Probably vacuum leak or IAC issue. Check vacuum lines.
Reply
Old Feb 22, 2009 | 12:33 AM
  #3  
REDZMAN's Avatar
Senior Member
 
Joined: Mar 2002
Posts: 34,642
Likes: 0
From: Los Lunas, New Mexico, USA.
Vehicle: 2001 Hyundai Tiburon, 2004 Kia Sorento, 2010 Kia Soul
Default

Probably your TPS, or IAC I'd say.
Reply
Old Feb 22, 2009 | 11:32 AM
  #4  
bigfishmoney's Avatar
Thread Starter
Senior Member
 
Joined: Jul 2010
Posts: 730
Likes: 0
From: United States
Vehicle: 2001 Hyundai Tiburon
Default

it'll do this the whole time the cars running
Reply
Old Feb 22, 2009 | 11:44 AM
  #5  
'treezy's Avatar
Moderator
 
Joined: Mar 2006
Posts: 6,976
Likes: 0
From: Arizona
Vehicle: N/A as in Not Applicable, not Naturally Aspirated
Default

If it is just starting out hi and returning to a low (675) rpm, maybe osscilating a couple times then it just sounds like a cold start..

If it continues to oscillate my first guess would be a sensor somewhere is unplugged or damaged. Like an 02 sensor, IAT sensor, CP. Something along those lines. I'd go back and re-check everything, twice.

Reply




All times are GMT -6. The time now is 04:32 AM.