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Rough idle on cold start up on my 2005 jetta 2.5 liter

Rough idling 2005 volkswagen jetta 2.5 L 5 cylinder

Posted by grogan77 on

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5 Related Answers

Anonymous

  • 1 Answer

SOURCE: COLD START ROUGH IDLE

I hate to be the barer of bad news, but may be the head gasket.

My car started with rough idle. Then very hard to start in cold weather. Next started overheating, but no output from heater. Trickling sound from behind dash board. Overflow bottle overflowing.......

I replaced the water pump, radiator cap, thermostat, coolant, fan belts, power flushed the system. Nothing worked. Some research gave me the answer.

The head gasket leak was allowing exhaust gases to enter the cooling system, displacing the coolant. After use, as engine cools, coolant is sucked back into the system and coolant seeps into the cylinder. This gets worse over time.

First thing you'll notice is the rough idle as the spark plug burns off the coolant in the cylinder. (This is especially true at low temperatures.) If it is the head gasket, the other symptoms will follow as time goes by.

Posted on Jun 03, 2009

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Anonymous

  • 23 Answers

SOURCE: mercedes 190e 2.6 auto,starts fine

MAY REQUIRER THROTTLE BODY CLEAN UP,OR FUEL CLEANER IN THE SYSTEM...

Posted on Nov 15, 2008

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Anonymous

  • 1 Answer

SOURCE: 2002 grand am 4 cylinder rough idle and rough running

Check the ignition control module. Sounds like the exact same problem I have had with mine. Took it to the dealership and the were able to tell me right away. The ignition control module is very easy to replace and is located on the top of the valve cover. Hope this helps!

Posted on Apr 17, 2009

rockitman187

Randy Hough

  • 2559 Answers

SOURCE: Dodge ram rough cold start idle

Change the EGR valve.

Posted on May 05, 2009

BRADLEYFRANC

Bradley

  • 104 Answers

SOURCE: high rev, rough idle in golf

If your car is fuel injection,try changing the cold start temp sender.

Posted on Aug 14, 2009

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