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2003 wrangler hard to start

3K views 2 replies 3 participants last post by  blkrubi88 
#1 ·
Hi all,
I have a problem with my 2003 Jeep wrangler,
Every time I put fuel in the tank at the petrol station my jeep is really hard to start ( it normally takes about 15 to 20 secs and has nearly ran my battery flat before ) and then runs really rough for about 30 - 60 secs after it starts.
I have owned the jeep for about 6 months and this has happened every single time I have put fuel in the tank.
It starts and runs fine all other times all other times,this happens ONLY when I put fuel in the tank.
Any help would greatly appreciated
Cheers Nick
 
#2 ·
Next time you get down to about 3/4 or half a tank, open your fuel cap for about 20 seconds, put it back on, then try starting the jeep. There could be some kind of back pressure building up in your tank (I don't know where it wouls be coming from) and opening your tank to fill it could release this pressure causing the hard start.

Could be related to a bad oneway valve in your fuel pressure regulator. After that I have no Idea why it might only happen when you fill up.
 
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