Hey guys. I had this posted over on N54tech but I figured I would try here as well because not sure if everyone is on both forums.
Recently I switched my DIY Stage 1 255 inline fuel kit for a SteveAz Stage 2 kit. Since then I have had issues with the fuel gauge reading incorrectly. My gauge was working correctly before the install. The gauge never goes any higher than just under 3/4 of a tank and will go as low as about 1/8th and more recently to empty. Unfortunately these levels occur without any regard to the actual fuel in the tank in that they are never displaying the right fuel amount.
I have taken the following the steps without any resolution:
1. Removed neg battery cable for 15 minutes and reattached.
2. Reflashed my backend using the BB software doing a full forced write.
3. Did menu 1/5 to reset the gauges via JB4.
4. Did JB4 1/7 reset adaptations.
5. Did the hidden OBD menu 21 reset which resets the gauge cluster (I think the JB4 1/5 reset is doing the same thing?)
6. Did the hidden OBD menu 2 gauge cluster check which was normal.
7. Took the Stage 2 back out and replaced the float level sensor with one off my stock unit that I know was in good working order. The fuel levels changed slightly but seem to report the same incorrect ranges as before. I repeated the Menu 21 cluster reset after this because I read in other forums that you need to do it after replacing the sensor.
8. Removed the bucket hat and replaced with the one off my stock unit. No improvement.
9. Installed new battery and registered via BT software.
10. Reset multiple adaptations in BT software including ECU reset. There were some error codes related to the passenger bucket sensor under the instrument cluster and junction box sections but they werent currently present. I have deleted the codes and have been monitoring for them to reoccur which they havent.
I have been in touch with Steve who is a super nice guy and has been very helpful trying to help me get to the bottom of this. There was some speculation that pulling the LPFP fuse may have something to do with it. This was recommended in the old DIY instructions and Steve doesn't recommend it mainly because it isn't necessary since when you pull the connectors off the hat the unit is powered down. I have done 3 other cars pulling the fuse and I know people pulled it back in the day following the DIY. I have never had an issue before and I don't remember anyone else reporting this. When I took out the bucket to replace the float sensor I didn't pull the fuse but the problem was already there so I am not sure if that would even make a difference.
I used to always have the JB4 'boost on fuel' with no stealth but I have since turned it off. The first time I installed the Stage 2 kit this was enabled. It was turned off when I took out the Stage 2, changed the float sensor and reinstalled. I know the JB4 can alters the gauges so not sure if that is the issue. I have yet to enable this function since the problem started.
I have confirmed that it is the passenger side sensor that is reading wrong by using the hidden OBD menu 6 which tells you the liters of fuel on each side of the tank. When full my passenger sensor reads 25 liters low while the drivers sensor reads normal. I compared the values to a friends E92 which has a working gas gauge to determine the levels on a normal tank. If any one is curious we have a 16.5 gallon tank when completely full.
Has anyone experienced this issue? I have read on another forum that the dealer has installed a new tank in some cars because of bad sensors. Seems like it was a common problem with the E46 when people changed out the fuel pump albeit they have a much different float sensor.
I have contemplated going to dealer since I am still under factory warranty. My fear is that part of their diagnostics they may flash me to the newest DME software INA0S_IS which hasnt been cracked yet.
Thanks in advance for any input!
Recently I switched my DIY Stage 1 255 inline fuel kit for a SteveAz Stage 2 kit. Since then I have had issues with the fuel gauge reading incorrectly. My gauge was working correctly before the install. The gauge never goes any higher than just under 3/4 of a tank and will go as low as about 1/8th and more recently to empty. Unfortunately these levels occur without any regard to the actual fuel in the tank in that they are never displaying the right fuel amount.
I have taken the following the steps without any resolution:
1. Removed neg battery cable for 15 minutes and reattached.
2. Reflashed my backend using the BB software doing a full forced write.
3. Did menu 1/5 to reset the gauges via JB4.
4. Did JB4 1/7 reset adaptations.
5. Did the hidden OBD menu 21 reset which resets the gauge cluster (I think the JB4 1/5 reset is doing the same thing?)
6. Did the hidden OBD menu 2 gauge cluster check which was normal.
7. Took the Stage 2 back out and replaced the float level sensor with one off my stock unit that I know was in good working order. The fuel levels changed slightly but seem to report the same incorrect ranges as before. I repeated the Menu 21 cluster reset after this because I read in other forums that you need to do it after replacing the sensor.
8. Removed the bucket hat and replaced with the one off my stock unit. No improvement.
9. Installed new battery and registered via BT software.
10. Reset multiple adaptations in BT software including ECU reset. There were some error codes related to the passenger bucket sensor under the instrument cluster and junction box sections but they werent currently present. I have deleted the codes and have been monitoring for them to reoccur which they havent.
I have been in touch with Steve who is a super nice guy and has been very helpful trying to help me get to the bottom of this. There was some speculation that pulling the LPFP fuse may have something to do with it. This was recommended in the old DIY instructions and Steve doesn't recommend it mainly because it isn't necessary since when you pull the connectors off the hat the unit is powered down. I have done 3 other cars pulling the fuse and I know people pulled it back in the day following the DIY. I have never had an issue before and I don't remember anyone else reporting this. When I took out the bucket to replace the float sensor I didn't pull the fuse but the problem was already there so I am not sure if that would even make a difference.
I used to always have the JB4 'boost on fuel' with no stealth but I have since turned it off. The first time I installed the Stage 2 kit this was enabled. It was turned off when I took out the Stage 2, changed the float sensor and reinstalled. I know the JB4 can alters the gauges so not sure if that is the issue. I have yet to enable this function since the problem started.
I have confirmed that it is the passenger side sensor that is reading wrong by using the hidden OBD menu 6 which tells you the liters of fuel on each side of the tank. When full my passenger sensor reads 25 liters low while the drivers sensor reads normal. I compared the values to a friends E92 which has a working gas gauge to determine the levels on a normal tank. If any one is curious we have a 16.5 gallon tank when completely full.
Has anyone experienced this issue? I have read on another forum that the dealer has installed a new tank in some cars because of bad sensors. Seems like it was a common problem with the E46 when people changed out the fuel pump albeit they have a much different float sensor.
I have contemplated going to dealer since I am still under factory warranty. My fear is that part of their diagnostics they may flash me to the newest DME software INA0S_IS which hasnt been cracked yet.
Thanks in advance for any input!