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Old 05-24-2013, 09:10 PM   #1
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replaced my fuel sending unit today.

The job was fairly easy, I tackled it by myself.
key notes.
buy gas tank straps before you do this.

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Old 05-26-2013, 07:41 PM   #2
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50 miles and my gas needle hasn't moved. I hope the float works properly. When I started the job, the gas gauge said it was halfway in the red zone. The new sending unit said I had a quarter tank.

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Old 05-27-2013, 12:07 AM   #3
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That might not be good...50 miles should be around 3 gallons give or take.
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Old 05-27-2013, 07:03 AM   #4
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Did you buy a 15 or 19 gallon sending unit? That could be the difference.
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Old 05-27-2013, 09:46 AM   #5
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How did you replace just the sending unit? I've replaced several fuel pumps & the sending unit was spot welded to the fuel pump. Or did you spot weld your replacement too?
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Old 05-27-2013, 09:50 AM   #6
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When I did mine for my v8 swap from the 15 to 19 sender I replaced the entire assembly. Not sure about replacing just the sender.
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Old 05-28-2013, 10:03 AM   #7
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Well I hope I did the right thing. I put the one in that amazon suggested.
I replaced the whole unit. They looked the same.
pump, float, strainer, fuel regulator on top. the whole shebang.
Too late not to change it. When I get to 200 miles or so I will fill up and see how many gallons I used.
I guess I should have done a bit of research first on the sending units.
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Old 05-28-2013, 01:40 PM   #8
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15 and 19 look the same, if you have 15 gal tank look up vent tube mod.
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Old 05-31-2013, 04:49 PM   #9
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so far it seems as if the gauge is right on, I can't believe the gas mileage increase so far.
Usually I get about 150-200 miles per tank,
so far I have over 200 miles on 3/4 tank.
Another thing I noticed is the shake in the front end has quit since replacing the unit.

As far as the fuel pump inside the unit being spot welded, no. There is a plastic spacer that holds it in place.

As far as it goes, all the non-believers that Jeeps can get good gas mileage, I have seen now that my Jeep gets over 20 mpg with this new unit and filter.
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Old 05-31-2013, 04:51 PM   #10
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The fuel pump is held in place by a plastic spacer.
The shake in the front end has quit.
My gas tank is at 1/4 full and I have over 210 miles on this tank.
Who would have guessed a fuel unit was the answer to everything? Not me!
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Old 05-31-2013, 04:55 PM   #11
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Originally Posted by ChaddG View Post
so far it seems as if the gauge is right on, I can't believe the gas mileage increase so far.
Usually I get about 150-200 miles per tank,
so far I have over 200 miles on 3/4 tank.
Another thing I noticed is the shake in the front end has quit since replacing the unit.

As far as the fuel pump inside the unit being spot welded, no. There is a plastic spacer that holds it in place.

As far as it goes, all the non-believers that Jeeps can get good gas mileage, I have seen now that my Jeep gets over 20 mpg with this new unit and filter.
You're not calculating your mpg based on what the fuel gauge is indicating are you? The ONLY way to accurately calculate the mpg is as follows:

1) Completely fill your gas tank.
2) Note the mileage on your odometer or reset the trip odometer to 0.
3) Drive until the tank is almost empty.
4) Note exactly how many gallons it took to refill the tank completely as you did in step 1.
5) Note your before odometer/trip odometer readings & determine how many miles you drive after your previous fill-up.
6) Divide the exact number of miles driven by the exact number of gallons it took to fill up.
7) That calculation will yield your exact mpg.

Note that none of that involves paying any attention to the gas gauge which is not even close to being accurate enough for mpg calculations. Even with a new gas gauge sender.

Not to mention a new fuel pump/filter/regulator/gas gauge sender will not change your true mpg when that true mpg is calculated properly as above.
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Old 05-31-2013, 06:05 PM   #12
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Jerry,

I believe you covered all of this when the same poster started a thread about how he got 20 mpg after clearing the adaptive memory.
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Old 05-31-2013, 06:11 PM   #13
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Jerry,

I believe you covered all of this when the same poster started a thread about how he got 20 mpg after clearing the adaptive memory.
Yes, some need to hear such info a couple times before it makes sense or becomes believable.
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Old 05-31-2013, 06:52 PM   #14
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Love bringing cars back to life!

I did originally post the 20 mpg.
I calculate my mpg the propper way. empty, clear miles, fill, empty, refil, calculate.
I have not calculated quite yet, I am amazed Jerry B. That my miles per tank so far far exceed anything I have ever seen on this vehicle yet.
I WILL CERTAINLY be posting what my new mpg are.

I am sure no matter what I say about mpg and miles driven per tank there are always going to be the people who believe and those who don't.

I don't lie, I don't make stuff up, I don't exaggerate.

My driving is half city half highway. 20 miles city per day, 20 miles highway per day.

I am here to offer my experiences as a Jeep driver / mechanic.
I have been a mechanic for 16+ years.
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Old 06-04-2013, 08:39 AM   #15
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still averaging 16 mpg combined city hwy over 2 weeks and 2 tanks

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