I replaced my fuel pump and fuel sending unit and I'll be Doing the Knock Sensor Mod - Page 2 - Nissan Frontier Forum
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post #11 of 22 (permalink) Old 05-29-2016, 02:59 PM
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Next step the new bed goes on!!!!
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post #12 of 22 (permalink) Old 08-13-2016, 11:54 AM Thread Starter
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Quote:
Originally Posted by gspangen View Post
We got the new pump on but the truck won't start. Is there any prep necessary for the fuel pump and sending unit to make it work other than just installing the pump and connectors? I wonder if we should have added gas to the pump somewhere?

We got it working. helps to remember to put the fuel pump fuse back in.
The other thing that really helps is to not hook up the return line to the feed line. I'm pretty sure that gets the fuel pump pumping right back into the tank, lol.

I had tried starting it for a while so I through the battery on the charger overnight and it said it was down to 50%.

2004 Nissan Frontier 4x4 Long Bed NA
- mildly modified 65k miles
- why a CAI? Has one stock
(was out of commision for 4 years)
- grounding wires, as good as new NGK spark plugs
- K&N Air filter
1999 Chevy Prizm (really a Corolla)
- short ram modified for cold air
- Mevotech end links for the front and rear
- Moog coils front and back
- Catback 2.25" except wait, I put in a 2.75" cat!
- grounding wires
- NGK Iridium spark plugs
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post #13 of 22 (permalink) Old 08-29-2016, 08:37 PM Thread Starter
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Two edits and Three video editors later...

Finally a great how to part 1.

2004 Nissan Frontier Fuel Pump replacement, bed tilt method
https://youtu.be/Qa0wxeYL_s0

2004 Nissan Frontier 4x4 Long Bed NA
- mildly modified 65k miles
- why a CAI? Has one stock
(was out of commision for 4 years)
- grounding wires, as good as new NGK spark plugs
- K&N Air filter
1999 Chevy Prizm (really a Corolla)
- short ram modified for cold air
- Mevotech end links for the front and rear
- Moog coils front and back
- Catback 2.25" except wait, I put in a 2.75" cat!
- grounding wires
- NGK Iridium spark plugs

Last edited by AutoBravado; 08-29-2016 at 08:39 PM. Reason: link was showing up weird
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post #14 of 22 (permalink) Old 11-20-2016, 01:58 PM Thread Starter
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Fuel pump replacement part 2

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Originally Posted by AutoBravado View Post
Finally a great how to part 1.

2004 Nissan Frontier Fuel Pump replacement, bed tilt method
https://youtu.be/Qa0wxeYL_s0
LOL. Forgot about coming back and putting down part 2.

Fuel pump replacement part 2

I used the bed tilt method. It's honestly a lot less work than dropping the gas tank.

Plan on removing your return line on the opposite end then the primary fuel line so that you know how they go back. The next time I did this fuel pump, I had them backwards and had to charge the battery up. I may release that funny scene later where I'm shouting, don't put them on backwards! It's hard to, they're crossed when they're installed backwards.

2004 Nissan Frontier 4x4 Long Bed NA
- mildly modified 65k miles
- why a CAI? Has one stock
(was out of commision for 4 years)
- grounding wires, as good as new NGK spark plugs
- K&N Air filter
1999 Chevy Prizm (really a Corolla)
- short ram modified for cold air
- Mevotech end links for the front and rear
- Moog coils front and back
- Catback 2.25" except wait, I put in a 2.75" cat!
- grounding wires
- NGK Iridium spark plugs
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post #15 of 22 (permalink) Old 11-22-2016, 07:18 PM Thread Starter
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Fuel trims when your fuel pump goes out

Hey, have you ever wanted to understand fuel trims?

Well, I'm pretty sharp on them most of the time, and one of the few times this silly fuel pump went weak (thanks ethanol and rust - finally got that tank clean!) I had my torque app up and I was started watching fuel trims, trying to figure out what was going on.

I ruled out voltage because that was steady in the app. I ruled out an unresponsive TPS (throttle position sensor) and the MAF looked mostly right. So the air was getting in and the TPS was commanding more fuel, but the fuel trims were responding and to O2 sensors that were sensing everything going lean.

Our Frontiers don't have a sensor to see fuel flow, but I was able to figure that when the I pushed on the gas more than a little, I had less power, and it matched all the data, so my fuel pump was getting weak.

I also noticed it only was happening when the I was in traffic, you know, when things get hotter. That is often when electric motors can be at their worst.

If you learn better visually, I also shot some of this and put up some visual aids to help you out:
When your fuel pump goes weak, how does it look on sensors?

2004 Nissan Frontier 4x4 Long Bed NA
- mildly modified 65k miles
- why a CAI? Has one stock
(was out of commision for 4 years)
- grounding wires, as good as new NGK spark plugs
- K&N Air filter
1999 Chevy Prizm (really a Corolla)
- short ram modified for cold air
- Mevotech end links for the front and rear
- Moog coils front and back
- Catback 2.25" except wait, I put in a 2.75" cat!
- grounding wires
- NGK Iridium spark plugs
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post #16 of 22 (permalink) Old 11-24-2016, 02:29 AM
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One thing to add on your post: if one has a first generation Frontier with fuel sender issues, check with Nissan to see if there is an open recall on it. I checked for open recalls when I got my 2003 last March and found two open. One was for the fuel sender and the other for the lower steering shaft. Even though it had almost 200,000 miles on it and it was 13 years old, both issues were taken care of for no charge at the local Nissan dealer.
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post #17 of 22 (permalink) Old 11-26-2016, 12:36 AM Thread Starter
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Quote:
Originally Posted by smj999smj View Post
One thing to add on your post: if one has a first generation Frontier with fuel sender issues, check with Nissan to see if there is an open recall on it. I checked for open recalls when I got my 2003 last March and found two open. One was for the fuel sender and the other for the lower steering shaft. Even though it had almost 200,000 miles on it and it was 13 years old, both issues were taken care of for no charge at the local Nissan dealer.
Would they warranty a missing fuel sending unit? Before that question occurred to me, I thought, oh, I could have gotten it fixed for free! Well, at least, I don't think they'd warranty a missing one. Yes. They did my lower steering shaft for free a couple years ago and the fuel sending unit didn't come up. (or, you may recall better than me - I'm relying on you for what part of the steering). I lived in a ultra low rust area so the steering component would have been safe, but if I move to a salt belt ever, the new component should be safer.

Maybe by '04 they had the fuel sending unit resolved? I recall more now. Maybe when they asked my truck being super low on fuel, and I explained I didn't have a fuel sending unit, I got taken out of the running at that point for free.

2004 Nissan Frontier 4x4 Long Bed NA
- mildly modified 65k miles
- why a CAI? Has one stock
(was out of commision for 4 years)
- grounding wires, as good as new NGK spark plugs
- K&N Air filter
1999 Chevy Prizm (really a Corolla)
- short ram modified for cold air
- Mevotech end links for the front and rear
- Moog coils front and back
- Catback 2.25" except wait, I put in a 2.75" cat!
- grounding wires
- NGK Iridium spark plugs

Last edited by AutoBravado; 11-26-2016 at 02:55 PM. Reason: fixed a few sentences
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post #18 of 22 (permalink) Old 02-16-2017, 12:06 PM Thread Starter
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An update

Hey guys. I've been reading a lot of posts all over the forum the last few days. I don't stop by all the time, but it's been fun, even if I haven't commented much. Just a little shout out of thanks to all the good people here.

My fuel pumps have stopped going bad and I think it's because I got the Delphi fuel filter onto the Delphi fuel pump. Just glancing at it, it seems smaller but the filter is actually a lot more dense than the other choice at AutoZone.

I think a fuel treatment has really helped me too.

Lucas Upper Cylinder Lubricant with a little fuel treatment that's traditional to fuel injector cleaner, but mostly it's not a fuel treatment...it just goes into your fuel tank if that makes sense. Anyway, feel free to check out the video link about it. I tried as a non-scientist to explain what I think it's doing. The comments in video are great. I did another experiment since the video and on short city trips, I get 11 miles per gallon without it and with I get 13 miles per gallon usually. Before I only had highway data, but a closer job site got me to change my experiment up.

2004 Nissan Frontier 4x4 Long Bed NA
- mildly modified 65k miles
- why a CAI? Has one stock
(was out of commision for 4 years)
- grounding wires, as good as new NGK spark plugs
- K&N Air filter
1999 Chevy Prizm (really a Corolla)
- short ram modified for cold air
- Mevotech end links for the front and rear
- Moog coils front and back
- Catback 2.25" except wait, I put in a 2.75" cat!
- grounding wires
- NGK Iridium spark plugs
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post #19 of 22 (permalink) Old 02-16-2017, 12:15 PM Thread Starter
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More on the Delph Fuel Filter

Don't get brought into a Delphi fuel pump lifetime warranty. I was pretty excited. I've replaced a few pumps in the last few years some during and some after the Delphi 1 year warranty. You see, I'm not saying it isn't a lifetime warranty, it's just that it ISN'T a lifetime warranty unless you also buy their fuel filter.

I was really "lucky" my "lifetime" fuel pump failed in the first 90 days. That's when enough of the Lucas treatments and finally cleaned the last of what I couldn't reach in the fuel tank. Now if I keep using the additive I hope to have years of driving like you should without a fuel pump failure.

So my point is, if you go to AutoZone get the Delphi fuel pump and Delphi fuel filter. Then you get the lifetime warranty, at least when I bought it some months back.

I'm not knocking the pump - pumps fail when they process rust that's all.

2004 Nissan Frontier 4x4 Long Bed NA
- mildly modified 65k miles
- why a CAI? Has one stock
(was out of commision for 4 years)
- grounding wires, as good as new NGK spark plugs
- K&N Air filter
1999 Chevy Prizm (really a Corolla)
- short ram modified for cold air
- Mevotech end links for the front and rear
- Moog coils front and back
- Catback 2.25" except wait, I put in a 2.75" cat!
- grounding wires
- NGK Iridium spark plugs
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post #20 of 22 (permalink) Old 02-16-2017, 08:51 PM
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If anyone is interested walbro makes a 255 that is a direct fit
http://www.highflowfuel.com/i-103851...1998-2004.html

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