NV passenger fuel pump and spark plug replacement

Joined
Jan 5, 2017
Messages
401
Location
Talkeetna AK
Just thought I’d share my experience and few pictures.
Just tried to replace the fuel pump today on a 2016 NV passenger 5.6L. Could not reach to detach the fuel line and power connection till I dropped it some. Was a pita.
Had lugging/stalling whenever I hit the gas…especially if there was a downshift. Cold temperatures seem to make things better. This had been occurring since last summer.
However, when the lugging started, the fuel trim would just go to zero and the front A/F ratio sensors didn’t show much either….until recently when it got bad. The fuel trim and A/F ratio would go through the rough when it happened.

Had a new fuel pump shipped in (nobody has one in Alaska) and had the tank dropped before realizing the new pump had a broken fuel line inlet.
However, after seeing how much sand and dirt there was in the bottom of the tank and in the filter for the pump, i just cleaned the tank out really well, removed the old clogged filter, and it runs beautifully.
Sending the new pump back and hopefully I will be fine without the filter🙏.
Oh, the dirt was from one of my kids shoving it down the fuel filler hole🤬.

I also replaced the original NGK Laser Iridium spark plugs with NGK ruthenium a few weeks back. Rutheniums were the same price as the iridium IX.
The van had 108k miles plus LOTS of idle time.
The old ones weren’t too bad. They had a gap of about .046. Gap of new ones are .044. It does run a little better with the new plugs.

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Actually I do have a question. Any of you that have changed out your fuel pump ever run into much dirt etc in your fuel tank? Just curious if it’s much of a problem with the regulations on the gas stations and them having their own filters?
 
I did my 2008 Xterra - its likely the same pump, and I couldn't see really anything in the tank. The filter did look pretty "full" but it was more like white lint had plugged it up - not really sure how to describe it. Definitely was not dirt. It had maybe 370,000 miles at that time. I also think it was just the filter - mine had a weird long start but only when warm, not hot, not cold. Changing the pump solved that problem.
 
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