Misfires after heavy rain. (04 Golf, Jetta, any 2.0 Engine) - Page 2 - Volkswagen Forum - VW Forums for Volkwagen enthusiasts


Reply
 
 
 
Thread Tools Search this Thread
  #11  
Old 03-01-2017, 12:05 AM
Junior Member
 
Join Date: Jul 2016
Posts: 14
Default

So after having a look under the dash, everything appears to be perfectly dry. No sign of moisture anywhere so it must be something under the hood or the ECU itself, but being where the ECU is located, it doesn't make any sense that it would dry up so fast if you run the engine for a minute, and this problem doesn't happen when the car is being driven in the rain..This happens only when the car sits parked in the rain, and it seems to be that a light rain doesn't affect it. Only when it rains hard does the engine act up when you go to start it..I would think that if the ECU were getting wet, it would cause the engine to misfire while driving the car in the rain, but you can drive it all day long in the rain and it's fine..It only happens when it sits parked in the rain..I'm pretty sure this only happens when the engine is cold and it rains..Doesn't have to be real cold, as in 30 degrees, it can be 80 outside and if it rains overnight, it will misfire when you go to start it in the morning..I do not recall this ever happening when I shut the car off (engine hot) when it was raining and got back in 20 minutes later and started it up. If the engine is hot, it's start up and run fine...So whatever it is that's getting wet causing the misfire, has to be cool enough to let moisture form on it..If the engine is hot, it will run just fine...But now I have a problem with the immobilizer..So I have to figure out how to get the immobilizer to recognize the keys again...Immobilizer light flashes no matter what key I use..

Last edited by grbullets; 03-01-2017 at 12:07 AM.
Reply With Quote
  #12  
Old 12-16-2017, 04:39 AM
Junior Member
 
Join Date: Oct 2017
Posts: 1
Default

I had pretty much the same problem,but with a 2001 Cabrio. I live in North Florida and when it was cool mornings it would not start. So at night I started my car and sprayed lightly with water looking for arcing.
Found it right away my coil is located on the firewall and rain got to it. It had a small crack.
I changed it,15 min job $17 on eBay ,and No more problems. I did have intermittent misfires before and a little loss of power.
No more, runs smooth 2.0 ABA 210,000 dosnt burn a drop of oil, but now have the infamous ticking at cold starts of the valves I believe .
I hope that helps
Reply With Quote
  #13  
Old 09-06-2018, 12:34 PM
Junior Member
 
Join Date: Sep 2018
Posts: 1
Wink Heavy rain leaks into footwell...

GRBullets your post about the firewall makes sense as I find my footwell is flooded/wet after heavy rain - having just got back to the office at half 6 pm and with work to do as the heavens opens I hope I don't suffer your problems when I try and go home later!

Have you or anyone succeeded in finding the source and stopping the cause of this leak?!
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
06 Golf GLS runs real bad after rain grbullets Volkswagen Golf 15 12-18-2017 11:58 AM
96 Jetta GL not turning over after rain and college starts tomorrow :( tgavett Volkswagen Jetta/Bora 0 09-08-2011 04:31 PM
99 Passat 1.8t always misfires 3 of 4 cyl's Vandal Volkswagen Passat 2 09-18-2010 12:40 AM
passat wont start after heavy rain Chipaco02 Volkswagen Passat 3 05-30-2009 09:50 AM
1998 jetta gl can not be ignited in heavy rain morningsc Volkswagen Jetta/Bora 2 09-28-2006 06:06 PM


Tags
2.0, 300, 303, misfire, rain

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 09:43 AM.


© 2018 MH Sub I, LLC dba Internet Brands
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.