Fuel gauge problem. Detailed. - - Infiniti G35 & G37 Forum Discussion | panoramic-3d.ru
Show Your Support Become A Premier Member

    > >
  • Reload this Page >
    • Fuel gauge problem. Detailed.


Fuel gauge problem. Detailed.

Thread Tools Rate Thread
Old 06-02-2014, 04:30 PM
Registered User
Thread Starter
iTrader: (48)
Join Date: Feb 2008
location: Chicago
Posts: 2,286
Thanked 49 Times in 43 Posts
Fuel gauge problem. Detailed.

CLIFF NOTES ON BOTTOM.

So been reading up on people with fuel gauge problems and I don't seem to have a solution for this. At this point its time to replace an item and well they are pricey.

Here it goes....

This is on my 2005 AWD sedan, currently with 86k miles. I keep detailed MPG logs and know i'm about 300miles per tank before i have to fill up with 15-17 gallons of fuel.

About 10k miles ago, i noticed that my fuel gauge while driving would slowly increase or decrease. Normally this would happen when i'm near 1/4 of a tank. By that time i should be in the 200-300 miles driven, it would slowly go up to half way and normally stop at 3/4 tank. A few key cycles and it would go back. This would happen randomly at stop lights and etc. It slowly got more and more common to a point where my normal day would be start car with 1/4 tank of gas, drive 10 miles to work and end up with 3/4 tank of gas. I saw the DIY cleaning of the sensors in the fuel tank. I cleaned it, it had a lot of dirty stuff as most people posted. NO DICE. It did get a little better but not much more. It knew when i filled up all the way. FULL TANK was always full tank.

About 2k miles ago all hell went loose. My fuel gauge only works from FULL to 3/4 now. It would never go any lower. I figured the sensor was stuck up, pulled out both units and NOTHING was binding. Then i remembered if it was stuck, then it would be stuck at the same location, this wasn't the problem. It moved from FULL to 3/4 give or take.

So now i'm kinda stuck here. Been reading around, i know there was a recall on my 03-04 M45 for the fuel gauge and the replacement was to replace the gauge cluster. I also seen on some postings here it was a suggestion option, all cars were under warranty so it was of no cost. It seems the common replacement was to replace both fuel units.

Pretty much is there anything I overlooked? Should i try something else? Replace the cluster or the fuel units? Driver's unit is like $75-100 and Pass side is $375-425
----------------

Cliff notes.

Fuel gauge has mind of its own. Doesn't read right. I know for the fact i should have 1/4 tank of gas it will read 3/4. As time went on, now it only reads from FULL to 3/4 and nothing lower. Cleaned both fuel units inside tank TWICE and still have problem. Considering gauge cluster to be issue.
The Following User Says Thank You to TurTLe* For This Useful Post:
ranhood (06-13-2014)
Old 06-02-2014, 04:44 PM
Registered User
iTrader: (5)
Join Date: Jul 2007
Posts: 471
Thanks: 0
Thanked 5 Times in 5 Posts
Move the float with by hand and see if the needle on the gauge moves. The float is what tells the gauge how much gas u have. Mine would act funny as it got close to 1/4. I dont have the car anymore though.
Old 06-02-2014, 04:57 PM
Registered User
Thread Starter
iTrader: (48)
Join Date: Feb 2008
location: Chicago
Posts: 2,286
Thanked 49 Times in 43 Posts
Quote:
Originally Posted by CLyons0203 View Post
Move the float with by hand and see if the needle on the gauge moves. The float is what tells the gauge how much gas u have. Mine would act funny as it got close to 1/4. I dont have the car anymore though.
Wouldn't i get splashed with the fuel pump primed with the key ON? Now that i think about, its not a bad idea. Someone also mentioned to check the resistance on the wires, kinda like watching the gauge. I'll look into this.
Old 06-02-2014, 05:09 PM
ScraggleRock's Avatar
Registered User
iTrader: (4)
Join Date: Dec 2013
Posts: 6,627
Thanks: 0
Thanked 694 Times in 589 Posts
Something similar happened to me, but mine still kinda worked.

My guage has always acted kinda funny, going up and down a little bit and whatever, but at least it was consistent in where/how it did this. Then one day I reset the comp (battery disconnect method) and it just screwed it all up. It would be fine down to a half a tank then just stay there no matter how long I drove, then just drop to empty out of no where. After a couple tanks of gas, this somehow corrected itself and now it works more perfectly than it ever has. Completely accurate, linear and consistent.

Basically, I think the things just a piece of crap and its gonna do what it wants regardless of your efforts.
Old 06-02-2014, 05:24 PM
Registered User
iTrader: (5)
Join Date: Jul 2007
Posts: 471
Thanks: 0
Thanked 5 Times in 5 Posts
disconnect the fuel pump harness or pull the fuse first.
Old 06-02-2014, 06:54 PM
Registered User
Thread Starter
iTrader: (48)
Join Date: Feb 2008
location: Chicago
Posts: 2,286
Thanked 49 Times in 43 Posts
Quote:
Originally Posted by CLyons0203 View Post
disconnect the fuel pump harness or pull the fuse first.
Pulling the fuse

The fuel pump harness should have the fuel level sensor wiring as part of it i assume. I'll test it out morrow and report back.
Old 06-05-2014, 02:36 AM
Hotdawwgman's Avatar
Registered User
iTrader: (19)
Join Date: Feb 2008
location: SoCal/Chicago at Heart
Posts: 7,053
Thanked 123 Times in 108 Posts
Please let us know as I am in the same boat s you...
Old 06-05-2014, 02:57 AM
1SlowSedan's Avatar
Registered User
Join Date: Feb 2008
location: WEST COAST
Posts: 3,866
Thanked 28 Times in 11 Posts
Experiencing the same damn thing. Good old Infiniti's right??
Old 06-06-2014, 10:56 AM
Registered User
Join Date: Apr 2005
Posts: 373
Thanked 48 Times in 41 Posts
Well, we had '05 and '06 Gs and I ended up replacing both car's fuel level senders around 60k as they were causing the gauges to read erratically.

For me (beginner) it was a fairly elaborate operation, and working with gasoline isn't fun, but it fixed the problem. I bought new replacement units, both sides, the one on the fuel pump snaps onto the unit.

I was surprised to realize that the system is simply live electrical wiring operating in gasoline (yikes!) and the sender's "sweepers" are actually open and exposed and certainly bound to collect contamination over the years and fail as we are all experiencing. The gauge in the dash simply interprets the signals from both senders to determine how much gas you have left, but if either one sends bogus signals it can't do it's job.

All this to say odds are 2:1 that the senders (2) are the problem not the gauge (1). Cleaning them is at best a temporary situation as the gasoline is not only contaminating the contacts but probably working as a solvent and removing the metal etchings of these sweepers to the point where they just can't do their jobs. Would have made more sense if the actual sweepers were up above the seals somehow but ... no.
Old 06-06-2014, 04:46 PM
Hotdawwgman's Avatar
Registered User
iTrader: (19)
Join Date: Feb 2008
location: SoCal/Chicago at Heart
Posts: 7,053
Thanked 123 Times in 108 Posts
Cool. I am going to be replacing mine hopefully next week. I have a pretty sick extended warranty so I am going to take it to the Stealership. to get fixed...
Old 06-06-2014, 06:59 PM
Registered User
Thread Starter
iTrader: (48)
Join Date: Feb 2008
location: Chicago
Posts: 2,286
Thanked 49 Times in 43 Posts
So i had time today to do the work. I took some pictures but i'll post later, its nothing special.

I'm posting my findings hoping that some of you guys are more technical and see something that i dont. Because i dont know which one is bad or are they both junk.

So Both units pulled out of the car, placed at EMPTY position ( all the way down) the fuel gauge shows HALF. Placed at FULL position, fuel gauge shows FULL.

If either are disconnected gauge will drop to EMPTY. So i both are working to some degree and they work together.

Now more technical. I ohmed everything out, This is where it gets interesting.
- both at full read out 4ohms.
- about half way both read about 20-25 ohms.
- Now the sender at empty reads 45ohm
- fuel pump at empty reads 80ohms and is very sensitive from empty to 1/4.

Anything stand out to you guys?

ALSO.... Anyone know if the fuel pump for the coupes are the same for the sedans. If the years are all the same. Every infiniti dealership online site ive been to only lists 05 coupe fuel pumps. The aftermarket states coupe as well.

Last edited by TurTLe*; 06-06-2014 at 07:45 PM.
Old 06-07-2014, 03:26 AM
Registered User
Join Date: Apr 2005
Posts: 373
Thanked 48 Times in 41 Posts
I don't recall what the resistance readings should be but based on your description I'd say the fuel pump side is toast. I'd still suggest replacing both sides while you're in there. Same type of part, same age, same exposure to gas, likely to both fail at a similar time... My opinion anyway.

I believe what you want are the first two items listed here:

(Choose year, model, trim...)(reference number on diagram is not correct)
Those are the senders only, not including the fuel pump. The one on that side snaps onto the bottom of the pump. There are DYIs here somewhere for these bits, and you can get your own service manual here:

with more details on removal and replacement. ("fl.pdf" is the fuel system book).

You're also supposed to discard and replace the blue O-rings whenever you pull those pieces, being careful not to get any gas on them...
Old 06-08-2014, 02:44 PM
Registered User
Thread Starter
iTrader: (48)
Join Date: Feb 2008
location: Chicago
Posts: 2,286
Thanked 49 Times in 43 Posts
I'm going to call that dealership to see if thats the right part. I haven't talked to a dealership yet to see if i can just get the sender by itself.

So the sender, the arm and the float is all one unit as i see it. I know i dont need the fuel pump. The unit on the driver side i can order as a whole assembly because its under $100 as a unit from most places i see.


Here are some pictures for anyone interested in doing this work.

To get to your FUEL PUMP FUSE. You gotta pull off the covers of your battery box. About 8 push clips.


Name: IMG_240_zpsb1d0ypze.jpg
Views: 6397
Size: 78.4 KB

Pull the cover off to expose this. The fuse is a 15A on the driver side row first one. I already pulled it in this picture its right over the 3 red 10A.
Name: IMG_227_zpszxppyg9j.jpg
Views: 6363
Size: 82.0 KB


Pull your rear bottom seat cushion out. 2 pull tabs.
Name: IMG_214_zpsug6hnda4.jpg
Views: 6751
Size: 65.9 KB


4 flat plastic tabs, you can use pliers or a screwdriver. And then 6- 8mm bolts to remove to get the cover off. unclip the harness and fuel line ( this one can spray fuel) And pull the pump out

Name: IMG_241_zpsl9oojsvb.jpg
Views: 8278
Size: 83.1 KB


Then you can measure out the resistance if you want or just replace.
Name: IMG_231_zpssrkkrpzt.jpg
Views: 6568
Size: 62.5 KB


Driver side level sensor on the LEFT and fuel pump assembly on my right.
Old 06-10-2014, 06:28 PM
Registered User
Thread Starter
iTrader: (48)
Join Date: Feb 2008
location: Chicago
Posts: 2,286
Thanked 49 Times in 43 Posts
So i called and confirm those are the correct parts. I also asked how often do they replace both and they say rarely. Its normally one or the other.


So here is another thing i found. I got a hold of alldata to give me the specs on the level senders and they are correct. The driver side at empty should be 40 ohms and the pass side at empty should give me 80ohms. So really i have nothing to go by.
Old 06-10-2014, 07:11 PM
ScraggleRock's Avatar
Registered User
iTrader: (4)
Join Date: Dec 2013
Posts: 6,627
Thanks: 0
Thanked 694 Times in 589 Posts
Whhoooaaa..you don't need to drop the tank to get to those sensors? Helllll yeah..awesome..

Related Topics
Thread Thread Starter Forum Replies Last Post
DIY: Remove Gas Pump to Clean Sending Unit & Clear P0463 Code RemmyZero V36 DIY 8 Yesterday 11:08 PM
A few problems I have questions about Dallsinghjr1 G35 Coupe V35 2003 - 07 10 09-17-2016 10:39 AM
Complete Clutch Flywheel Kits AL8782 G35 Coupe V35 2003 - 07 4 10-03-2015 11:26 AM
Melanie Blue 9tray turbo Media Share G35 Coupe V35 4 09-29-2015 11:22 PM
Need to remove fuel from gas tank. HELP HELP Hogbone Engine, Drivetrain & Forced-Induction 2 09-28-2015 07:44 PM


Tags
2005, boat, broken, driving, drops, fuel, g35, panoramic-3d.ru, gage, gas, gauge, infiniti, malfunction, olny, problem, put, reads, replace, sencer, sensors, tank, to34
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:13 PM.


Copyright ©2002 - 2017, panoramic-3d.ru All Rights Reserved. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in:

Related pages


what is a muffler delete2003 nissan 350z twin turbo kitg35 oem headlightsinfiniti elite protection planpennzoil 10w30bradshaw infiniti serviceleather dash repairnismo brake padsmaxima modsmaaco car paint job pricesmilky headlightsanti freeze colorhow to program a viper alarm remoteho alternators20 status rimsduplicolor black chrome reviewsanta monica infinityinfiniti winter tiresinch lbs torque wrenchaltima lowering springsinfiniti g37 lightsbridgestone pole position s 04 reviewcheap subwoofers that hit hardduraliminoverfilling automatic transmission fluidalpine iva-w205 manualhonda rear caliper toolpainting alloy wheels diy350 intake manifold torque specsinfiniti m45 forummegan test pipesdo it yourself rock chip repairyokahoma yk580duralast reviewhow to reset kenwood head unit2006 altima se-r for salels1 swap forumradiator bleeder valvesg35 interior lightsntb monroevilleyokohama es100drag dr 35 wheelsagincourt nissaninfiniti g35 rimsadvan avs model 6what is spark plug heat range2003 honda accord trunk lidis clutch fluid the same as transmission fluidcar brakes lock up while drivingelemental designs nine.119 inch drag radialprojector retrofitsemanagesymbolic rims center capinspection sticker nj2007 infiniti g35 basesealed vs ported boxglendale infinitkyb excel gfortune suspension2005 acura tl rimvq35de camshafts2002 g35 couperear mount turboshypergroundfeathered tyresg35 engine swapg37 coupe iplaccord 8th gentail lights fuse keeps blowingdog seat hammock cover