1.8t wont start! - VW Forum :: Volkswagen Forum
VW Forum VW Forum

» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   VW Forum :: Volkswagen Forum > Volkswagen Models > MK4

MK4 Discussion area for the new fourth generation Golf IV, 337, R32, 20th and Jetta IV produced from 1998 to 2004.5 including Cabrio models.

VwForum.com is the premier Volkswagen Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 01-27-2012, 11:33 AM
Member
Points: 257, Level: 5 Points: 257, Level: 5 Points: 257, Level: 5
Activity: 2% Activity: 2% Activity: 2%
 
Join Date: Nov 2011
Posts: 14
Default 1.8t wont start!

ive got a 2003 1.8t jetta, last week i started having a problem on startup with it. i got in and tried to start it but it just turned over and wouldnt start. so i pumped the pedal a little next time and it fired right up and ran fine. the next day the same thing happened a couple times. the next day the same thing, and so on and so forth. once running however there were no problems, even at idle it runs smooth. today the car just wont start though. its been happening when the car is parked uphill, downhill or on flat ground. any ideas what it could be? any suggestions would be appreciated
__________________
2003 jetta 1.8t wolfsburg edition
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-27-2012, 12:39 PM
_FUBAR_'s Avatar
MK4 & MK5 Owner
Lifetime Supporting Member
Points: 32,559, Level: 100 Points: 32,559, Level: 100 Points: 32,559, Level: 100
Activity: 99% Activity: 99% Activity: 99%
 
Join Date: Oct 2009
Location: Pittsburghish
Posts: 8,114
Default

pumping the peddle will do nothing. there is no throttle cable.
__________________
MK4 & MK5 Owner.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-27-2012, 01:08 PM
TyTyVDUB's Avatar
Super Member
Points: 6,225, Level: 51 Points: 6,225, Level: 51 Points: 6,225, Level: 51
Activity: 4% Activity: 4% Activity: 4%
 
Join Date: Sep 2011
Location: Mertztown, PA
Posts: 1,430
Default

Sounds to me that it gets flooded...
__________________

Rise Above Hate | RELENTLESS
2000 Volkswagen Jetta MK4 2.0 GLS 5 Speed | TyTyVDUB
Magnaflow Cat-back Exhaust system, Raceland coilover springs, Boser hood, Short Ram air intake, Driver side Raxle.

1994 Ford Ranger Sport 3.0 4x4 Automatic | TyTy4x4
Magnaflow Duel exit Exhaust, Cooper STT 31x10.5-15 Tires.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-27-2012, 04:57 PM
fukn_dubn_gti's Avatar
Moderator
Points: 32,381, Level: 100 Points: 32,381, Level: 100 Points: 32,381, Level: 100
Activity: 99% Activity: 99% Activity: 99%
 
Join Date: Oct 2009
Location: Wernersville, PA
Posts: 9,654
Send a message via AIM to fukn_dubn_gti
Default

sounds like you have shit in the tank.. covering the pick up tube for the fuel line to the motor. just enough that it creates a partial block and giving it a hard time starting / uphill. and probably only sloshes right when the car is on a hill.


the other thing to check is the fuel filter.
can you hear the fuel pump purge? could also be a dieing pump.


lastly.. double check that you have spark. a spark issue can cause this..
when did you change plugs / coil packs last?
__________________
Mods:
More Than You
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-28-2012, 11:02 AM
No Life Outside VWforum
Points: 10,602, Level: 68 Points: 10,602, Level: 68 Points: 10,602, Level: 68
Activity: 5% Activity: 5% Activity: 5%
 
Join Date: Oct 2009
Location: Milwaukee, WI
Posts: 3,759
Default

Maybe a leaky injector flooding the car out? He said pumping it made it start. I don't know if these cars have a fuel cut off switch built into the pedal or not. If they do maybe he cut off the fuel and it started.
__________________


Quote:
Originally Posted by 04gti1.8t View Post
i would rather be gay than have a prius
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-28-2012, 01:52 PM
fukn_dubn_gti's Avatar
Moderator
Points: 32,381, Level: 100 Points: 32,381, Level: 100 Points: 32,381, Level: 100
Activity: 99% Activity: 99% Activity: 99%
 
Join Date: Oct 2009
Location: Wernersville, PA
Posts: 9,654
Send a message via AIM to fukn_dubn_gti
Default

i dont remember seeing one..

but i could be wrong. (fuel cut off)
__________________
Mods:
More Than You
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-31-2012, 08:38 PM
Member
Points: 257, Level: 5 Points: 257, Level: 5 Points: 257, Level: 5
Activity: 2% Activity: 2% Activity: 2%
 
Join Date: Nov 2011
Posts: 14
Default

Im officially stumped. Any electrical wizards out there?? Alright so i started looking into what was going on here a bit more and realized i couldnt hear the fuel pump when i turned the key on. First i checked the fuel pump fuse and it was fine. Then i checked for power at the fuel pump connector and there was nothing. Then i checked for power at the fuel pump fuse (F2 and still nothing. Then i checked the ground circuit off the connector and all was good. So after this i thought the problem had to be the fuel pump relay. I went out and bought a new one today and plugged it in but unfortunately, not that easy.

I attached a copy of the wiring diagram i was going off, (hopefully it shows up)
and as you can see, along the way from the fuel pump relay to the fuel pump there are 3 other fuses and their associated components which get power from that relay. The other 3 are the fuel injectors (F32), and two others for engine management (F34) and (F43). With the new relay in place i checked for voltage while turning the key on at all 4 fuses mentioned, and i read the same at all of the fuses besides F32. At fuse 32 i read no voltage , about 0.004, and it didn't change at all with the turning of the key. At the other 3 however i read 1.8v and it would drop slightly while turning the key on. And finally at the fuel pump connector i read about 1.8v again, but when i turned the key on it would jump to 12.5v for a split second before dropping back down to 1.8.

I decided i would take a look at the injectors and see if everything looked alright, and i couldn't find any issues. No shorts to ground.

A couple things i find strange about all this is that while i was reading 1.8 volts at the 3 fuses and the connector, the key was out. Should there be any voltage at all without the relay making contact? Also i was only reading 12.5 volts for that split second at the connector, nowhere else. Another thing i find odd is that for the last week it was an intermittent problem so whatever it is it came and went.

Any thoughts?
Attached Thumbnails
1.8t wont start!-1.8-wiring-diagram.jpg  
__________________
2003 jetta 1.8t wolfsburg edition
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-01-2012, 11:21 PM
Member
Points: 257, Level: 5 Points: 257, Level: 5 Points: 257, Level: 5
Activity: 2% Activity: 2% Activity: 2%
 
Join Date: Nov 2011
Posts: 14
Default

Oook, got it figured out, and i feel like an idiot.. It was the pump all along, must have been stuck in a dead spot. I was so concentrated on the weird voltage readings that i over looked the obvious stuff! Now i see why i wasnt getting any voltage there.. Anyway thanks for the help guys. At least i learned a thing or two about the car!
__________________
2003 jetta 1.8t wolfsburg edition
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-02-2012, 01:33 PM
Shameless's Avatar
No Life Outside VWforum
Points: 16,441, Level: 82 Points: 16,441, Level: 82 Points: 16,441, Level: 82
Activity: 40% Activity: 40% Activity: 40%
 
Join Date: Sep 2011
Location: Saint Paul, MN.
Posts: 4,392
Default

good deal.
__________________

Quote:
Originally Posted by groundupjetta View Post
speed without looks is as useful as a girl without tits
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  VW Forum :: Volkswagen Forum > Volkswagen Models > MK4

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the VW Forum :: Volkswagen Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
why wont it start Dannimal MK3 12 01-09-2011 02:15 AM
wont start need help gidvt721 Passat 3 03-26-2010 11:54 AM
mk3 gti 8v wont start afc666 MK3 1 03-10-2010 01:01 PM
02' TDI wont start!!! adrijus MK4 2 12-02-2008 07:41 PM
Car wont start Slaven GTI MK4 3 01-24-2005 03:32 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 07:10 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
VWforum.com is a Volkswagen/VW Forum and enthusiast site and is not associated with VW/Volkswagen in any way.