6.9 idi running weird on rear tank

[Laine D]

Hey y’all. Here’s my problem. I have a rebuilt engine and a Delphi remanufactured IP and new injectors with probably 1500 miles on them . I also have an electric fuel pump. For quite a while my truck has kinda intermittently stalled if I have my foot on the floor and let off as the engine returns to idle. Now that I have a stick it’s way more noticeable. The weird part is that it does it the worst on the rear tank, and then when I run it on the front it still is there but it’s not as bad. It did this before and after I put a new injection pump on it. I’m not too sure what it could be. Could it be in the tank or maybe the tank selector valve?

 

[Thewespaul]

Your rear tank isn’t venting properly, you can confirm this by pulling the fuel caps off and taking it for a spin and see if it’s better.

 

[Laine D]

Your rear tank isn’t venting properly, you can confirm this by pulling the fuel caps off and taking it for a spin and see if it’s better.

thanks man, I’ll try it out when I get the chance

 

[firfyter]

Mine used to stall out when returning to idle and a guy told me that I needed to put addative in the fuel to increase lubrication. Try howse fuel treatment and see if it helps.

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