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Honda Civic GX Fueling Problems

44 messages,  Last post on Sep 24, 2009 at 6:29 AM

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What is this discussion about? Honda Civic, Fuel System, Alternative Fuels, Hybrid Cars, Hatchback

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#25 of 44 Re: Civic GX Fuel filters [rogerbohl] by fbaldwin Sep 13, 2006 (4:38 pm)
Replying to: rogerbohl (Aug 25, 2006 3:37 pm) You should follow the Honda Maintenance schedule that indicates that filter B (near engine) is to be replaced every 10,000 miles. I paid $122.00 at the parts counter.   Filter A (near rear of car) is to be drained every 10,000 and replaced every 30,000 miles. I paid $51.72 at the parts counter.   The service manual indicates to replace the O rings every time filter A is drained but the dealer in Monrovia did not have the rings in stock.   I think that the service sales staff do not understand the GX maintenance schedule. I was offered some other services at 15,000 (with my free engine oil change) but the service advisor did not know anything about the filter replacement schedule.
#26 of 44 Re: gx repair problem [mattod] by bank1avp Mar 03, 2007 (8:25 am)
Replying to: mattod (Aug 15, 2006 12:31 am) Did you ever get this problem repaired. The only 3 reasons I can think of why CNG won't go into the tank are:   1. Tank is already full 2. Fuel station pressure problem 3. Manual shut off valve under the car in off position   Replacing the tank would definately not do anything for you except lighten up your wallet. Even if the tank valve was malfunctioning it would still allow a fill up   Murphy
#27 of 44 Re: gx repair problem [mattod] by hondagxsales Mar 15, 2007 (5:27 pm)
Replying to: mattod (Aug 15, 2006 12:31 am) I believe that this year model has a manual shut off valve located in front of the drivers side rear tire. Look underneath the car and identify this valve. It may still be red. Make sure that it wasn't turned off for shipping purposes.
#28 of 44 Re: PHILL and Civic GX Fuel filters [nostrom0] by azcivicgx Jun 19, 2007 (9:26 am)
Replying to: nostrom0 (Aug 25, 2006 3:01 pm) On the 2006 and newer Civic GX, the low pressure CNG filter is much more expensive, $253.80 at Majestic Honda which is 30% off retail price. I'm not sure why a fuel filter cost so much, but changing it every 10-15k miles will eat up a lot of the maintenance savings typically afforded by natural gas combustion. FYI- part number 16905-RNE-A00.   Does anyone know what the cost of the high pressure CNG filter is on the 2006 GX, or what the part number is? Hopefully it is not outrageous!
#29 of 44 fuel gauge always reads less than half on 01 GX by tsmith5 Jul 12, 2007 (12:23 pm)
Does anyone know anything about the fuel guage? Where is the sensor located that gives the reading? I fill the car between 120 and 180 miles depending on the pressure of the last fill. I have never seen the low fuel warning light come on but it is probably part of the fuel gauge problem. Also I have heard conflicting info on temp. causing lower fills. I heard high temp cause less and cold weather would cause less. Which is true and if both are true how? Replies to this message: epnfrn (Jul 12, 2007 1:05 pm) tsmith5 (Jul 12, 2007 9:10 pm) lakewood90712 (Jul 13, 2007 9:12 pm)
#30 of 44 Re: fuel gauge always reads less than half on 01 GX [tsmith5] by epnfrn Jul 12, 2007 (1:05 pm)
Replying to: tsmith5 (Jul 12, 2007 12:23 pm) the fuel gauge is a pressure sensing device, and that's about all i know about it. as for the physics of a fill, i highly recommend hitting Wiki (look up 'ideal gas law' pV=nRT) ... in basic terms (i'm a biochemist, not physicist!); pressure, temp, volume are all related to eachother. this is why you see differences depending on temp. you absolutely can squeeze a whole lot more of the good stuff in when it is cold, even though on two different temp days you hit the same pressure. that said, theoretically that same temperature is important with how low 'empty' really is.   similarly, this is why you'll find a much 'fuller' tank at max pressure if you use a slower-filling device ... fast fills actually generate heat in the tank as the gas particles collide at higher velocities, reducing the number of good stuff (moles) you can squeeze in at max pressure.   i believe the owner's manual states that the gas gauge takes temp into acct when determining how much you have left (aka, when that light does come on, it should be temperature independant) and you should be able to make it the same distance (more/less) regardless of temperature.   if someone knows more, or any part of my understanding is incorrect, please chime in!   epi Replies to this message: tsmith5 (Jul 12, 2007 9:10 pm) lakewood90712 (Jul 13, 2007 9:12 pm)
#31 of 44 Re: fuel gauge always reads less than half on 01 GX [epnfrn] by tsmith5 Jul 12, 2007 (9:10 pm)
Replying to: epnfrn (Jul 12, 2007 1:05 pm) Thats more than I expected and more proof that you learn something new everyday. Thanks for the info. Still hoping for something on what i need to replace to get a working fuel gauge. Replies to this message: lakewood90712 (Jul 13, 2007 9:12 pm)
#33 of 44 Re: fuel gauge always reads less than half on 01 GX [tsmith5] by lakewood90712 Jul 13, 2007 (9:12 pm)
Replying to: tsmith5 (Jul 12, 2007 9:10 pm) If the fuel tank temp sensor or fuel tank press sensor goes open or shorted, the low fuel indicator will blink. The 01 / 02 GX service supplement manual has troubleshooting info.   The manual is available from Helm , or you can find them on e-bay for about $20.    The temp sensor is about $35 and the pressure sensor is about $250. Small chance that it is a pcm or software problem. This is on the high pressure side and not a do it yourself project. You are looking at $250 - $ 500 , most of that is labor.   Sometimes honda will cover repairs out of warranty on things that just should not fail under normal use. It doesn't hurt to ask at the service dept.
#34 of 44 Did anyone try to replace low pressure fuel filter for 07? by vicjon Nov 12, 2007 (3:57 pm)
Hi, I'm new to this web site and seems like this site has lots good info for Honda GX cng. I'm going to try replace low pressure fuel filter when it comes to replacing the filter but I'm looking for more info before I try to attempt it. need your help.   Did any of you guys tried to replace the filter for newer Honda GX 06 or 07 ?   For the 06 and 07 low pressure filter is located in the back of the car not like last model it was located in the front of the car next to engin.   Here is good web site for great price for honda parts www.thehondapartsstore.com   16905-S1G-003 ELEMENT ASSY., CNG FILTER $22.65   Vic

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