Santa Fe cold startted happening

Santa Fe 2004 2.7 FWD 41k miles
This problem started happening about two weeks ago. I've been having troubles cold starting as in it requires me to give it some pumping of
the peddle to get it started. When the engine is warm it seems to start ok. No engine lights or other alarms.
My family has four Santa Fe's; two '04's and two '05's that have never had any starting troubles what-so-ever.
When changing the oil tonight I noticed that the air box clamps where not latched but the air filter was clean.
Any clues?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Does the engine crank at normal speed? Does the engine crank for an excessively long time?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
hyundaitech wrote:

Yes it does.

Before it starts, yes. I hooked up a meter to the battery and it checked out a-ok.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
I'd primarily suspect that the fuel pressure regulator has gone bad and is allowing the fuel pressure to bleed off while the engine is off.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
hyundaitech wrote:

Makes sense to me as I have to slam the peddle to the board to start it.
Is this something that is user serviceable? I have the full-on warranty but if I can avoid the downtime of bringing it to the dealer all the better.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
You can do it yourself. It's attached to the end of the fuel rail.
A couple things to consider, though: 1. We haven't done a proper diagnosis. That would involve attaching a fuel pressure gauge and checking fuel pressure to see whether it bleeds off. 2. If you do the repair yourself, you'll have to pay for the parts. Warranty repairs are free (other than the inconvenience).
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
hyundaitech wrote:

Just got a call from Hyundai....yup, it was the fuel pressure regulator. Took them all of 10 mins to fix and covered under the warranty.
Thanks for the heads up!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.