Dodge Durango Forum banner
Cancel
Create thread New Garage Forums

2004 Durango 5.7 liter Evap issues/purge valve

2 reading
Jump to Latest
1 - 5 of 5 Posts
R

Robert Zecca

· Registered
Joined
·
1 Posts
Discussion starter · #1 · (Edited)
I own a 2004 Durango with 5.7 liter motor and constantly getting codes for small evap leak. I put on a new gas cap and pulled the tank down and checked everything on top of tank and evap line and all is good.

I noticed that the line going from Purge valve to throttle body was disconnected so I connected it and I reset the dash lite. The next day I start it up and start to hear a high pitched sound coming from the purge valve when it is cold. After a few minutes the sound goes away. A day later the engine lite comes back on. I reset it again. The next day the same thing...…..purge valve makes the high pitched noise and the second the noise goes away the lite comes on immediately. This never happened when the hose was disconnected.

I change purge valve and reset light. The truck is good for 2 days......then in the morning I start it up and high pitched noise comes back this time with the new valve and the light goes on.

What could be the problem? 108,000 miles on vehicle and it runs flawlessly besides this issue.

Thank you.
 
#2 ·
The noise I do not even have a guess, but while tank was down did you check the fuel pump for cracks around the plastic ring that fits against the tank? That is a common spot for the small evap leak code and should plan on replacing the fuel pump to resolve. This is really just and age thing as that plastic get brittle overtime so if your still running original fuel pump that is likely your source of the CEL.

The timing of the CEL coming on as that sounds stops is likely not related. The check that triggers that CEL will take a minute of two to run, and it will only run when fuel tank is something like 20-80% full. Does not run when completely full or near empty. I know anytime I have had the evap leak CEL pop up it was about 30 seconds after I was out of my driveway so probably about 1-2 mins from when vehicles was first started.
 
#4 ·
I know it is an expense you'd probably rather not have incurred, but if I had the tank down for inspection I would 100% have replaced the pump while I was at it. Aside from the plastic fatigue JCC sharply noted (which you may not even have been able to see), if that is an OEM pump you are still looking at a critical wear and tear item that is 15 years old. I would prefer to replace it during a preventative maintenance session, rather than when the D died and you now have to do a forced repair.

An anecdote from my own experience... A few years ago I did a big spate of PM on my '96 van. Nothing was 'broken' but all of it was either OEM or in service for a long time, so I figured why not. I considered the fuel pump at the time but opted not to replace it as it was running fine. A year later, the fuel pump went out. So, I was left without the van until I repaired it. I could have just done it when I did the other PM but I got all cheap and lazy, and paid for it.
 
1 - 5 of 5 Posts
About this Discussion
4 Replies
4 Participants
Last post:
Durangutan
Dodge Durango Forum
posts
509K
members
60K
Since
2004
Welcome to the best Dodge Durango Forum around, where you can find a great Dodge Durango Wiki and discuss the reliability of the different trim levels including the GT and SRT!
Full Forum Listing
Explore Our Forums
Durango Discussions 2014+ Durango Discussions 1998-03 Durango Discussions Dodge Durango 2018+ SRT and Hellcat Durango Purchasing