Missing surging after fuel fillup

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Mar 5, 2016 | 07:57 PM

wtroger

Thread Starter

Cargo Master

Joined: May 2001

Posts: 3,208

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Missing surging after fuel fillup

2005 E150 van. We have been fighting a lot issues with this van. A lot of parts have been changed. Now it runs fine until you fill it up with gas. Then it either wants to miss or surge. I know it is a van and not truck. Just not a lot of traffic in the van section. Right now no codes. Fuel pump module was changed a couple of months ago.

Mar 9, 2016 | 10:40 PM

delgriffith

Senior User

Joined: Oct 2012

Posts: 246

Likes: 3

Quote:

Originally Posted by wtroger

I was just reading a thread about evap codes and then yours. The evap system gets worked during a fill and maybe it's leaving you with some kind of air leak afterwards. A solenoid opens to route vapors from the tank to the engine during a fill and if it's sticking or some other issue it could cause an air leak to the vacuum side.

I'm not sure if the '05 4.2l is like the '06 5.4l but if it is, I'd look for the evap tube running off the back of the tank right up next to the left frame rail. Find the quick connect and disconnect it so the line off the tank is not connected to the gadgets in the back. Then fill and see if the problem recurrs. What you are doing is disconnecting the evap system and venting the tank to the atmosphere. Your gas cap light will come on when you do this.

This is also something to test when you fill and the pump keeps shutting off at anything more than a trickle of gas.

Disclaimer, only do this for troubleshooting. You're doing horrible damage to the environment if you keep it unplugged and put electrical tape over the gas cap light.