I just installed a walbro 255 pump GSS340M and now when i get in the truck i cant just turn the key and start it like normally now i have to turn the key on for a few seconds and wait and then the starter will kick over a few times and then it will start up? anyone else have this issue with the swap?

 

happened to mine too. It's a faulty check valve on the pump. I have run mine for over a year with no problems exept on start up.

 

well that sucks... you buy something new and you kinda expect it to work properly.

 

Why did you upgrade your pump?

 

it was getting a little lean up top and that annoying whinning.

 

That could definately be the problem. I was told when I purchased my Walbro pump that I could have an issue with extended cranking during start up. I purchased my pump from an authorized Walbro dealer and he stated that I might have the same problem you are describing. That is why Walbro does not list a part # for our trucks. This is what I was told anyway. Fortunately I did not have that problem with my truck. FYI!

 

I always heard it was the check valve too, my Walbro thankfully doesn't have that problem...

 

WOW. now my check engine light is on... who knows why this time. all i did was change the pump

 

codes p0135 p0327

 

i have had the same problem... no other problems though so i let it be...