How to Change your 2006-2011 Honda Civic GX CNG Low Pressure Fuel Filter 

+Danny H Let me know how many miles your car has on it and if the housing is bent. If a previous owner had it done at a dealer you can see how easily they are bent. Right tools and you should be able to not dent the housing. I took mine off a little hastily.

I have 72000 , fyi, my idle little rough, did plugs, no change, doing valve adjustment soon. Any ideas? No code though...

My lp filter housing was very slightly deformed but not enough to matter.

+Danny H I had a random hard jolt on mine at 180K miles and new coil packs solved it. As for rough idle could ir be your mounts? did you use the platinum plugs that factory uses? Please tell me if the valve adjustment helps because I was thinking to do that on mine but all my past mechanics tell me if there is not knocking sound then why do it. but Honda says do it I think every 30K? So yeah do it and tell me what happens!

+Danny H yeah, so there you go. Design flaw. The new housing is cool because you can bleed it like the high pressure housing (it actually uses the same plug), drain any oil or impurities in the housing. The Honda Maintenance minder has a minder that states to bleed the high pressure only. So if the low pressure had it i'm sure they would put bleed too instead of change.

Sorry to hear that! I feel your pain. I didn't really want to do this filter replacement again after this...I couldn't understand how the back housing went on so smoothly and this one would never catch threads! I keep telling everyone I will do a video about the aluminum housing that has a bleeder a really smart guy I know made but I moved so I have to find it and do the video...I think everyone seeing this video would spend the money to get the new housing and be able to bleed it! as well as remove and change filter.Honda (I have been told) could have designed this better but didn't because of cost. I mean it was the 3rd generation natural gas civic 06-2011! Even the fourth gen I believe uses same part.

Mine had a lot of oil in it so a filter housing with a bleeder would be a good idea. I don't know why Honda didn't design the low pressure canister to seat on an o-ring and have a drain plug like the high pressure canister has. I guess that would make too much sense. By the way, thanks for making the video. It definitely helped prepare me for what to expect.

Yeah the front housing has LESS pressure than the back so I know it's not because of pressure how they designed it. I wonder if the low pressure canister and base were available from another company pre designed and maybe already manufactured and they just adopted them making it cheaper to put in the civic... Hard to imagine they designed it from scratch like that but they also probably didn't care about natural gas cars (now discontinued). You're welcome man! I use videos all the time to help me out, best way to learn!

Finally filmed the video of aluminum low pressure housing with bleeder! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dSl7h1S75RU.html

+Hang Zhang Hi, I don't think you would be able to do it through the hood, but i did not try. However you do it you need to put a socket on that housing and loosen it. Let me know what you find. Be safe though!

Kuldeep Sandhu You are welcome ;) Thanks for watching

Hey Sherief, no...a hybrid is NOT the same.

Hi I just saw this comment sorry didn't respond earlier. What year is your civic gx? How many miles on it? How many miles since last fuel filter changes? You probably should have the filters checked out and changed especially if you have not changed them in many miles (30k+) because if you've been filling at stations with bad maintenance you probably have been getting pass through contaminants (compressor oil).

If you change your filters and it still happens you can get your injectors cleaned. You can also do other items depending on how good you've maintained your car like new plugs, new wire, and new coils. But start with the filters as my car stopped when it was cold

My opinion, it would not be worth the money to convert your car to gasoline, have to change out the whole engine and fuel system. What measurer? The fuel gauge? If that is your problem I would replace that gauge or just keep a good eye on your mileage every time you fill. Fill up every 200 miles or so.

Hello, are there CNG stations in Mexico? Always wondered

+Danny H I hear you, but I didn't have any problems with it. Sold the car but now I have a 2006 Civic GX with 195,000 miles on it! I have a cool housing made by a really smart guy cng consulting that has a bleeder on it that I'm thinking of making a video on...!! Would you like to see it? It is aluminum and does not have this denting issue.

sellyourgift yea would like to see it. Seems like that one should have a bleeder since it collects much more oil.

+Danny H Yeah I was told Honda didn't do this because of cost. It is really obviously they used an inferior metal and housing design on that low pressure filter. I've heard of the dealers having to replace them because they even damage them when doing this change. Will have to do a vid of it but need to buy the low pressure filter to change it. Unless I could just do a quick video of the housing design. Have to talk to the creator of the design to see if he will let me retail them too on ebay. I have to find a good tool to wrench them on though.

+Danny H I finally made a video of that aluminum housing replacement with bleeder ;) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dSl7h1S75RU.html

@@ItsBrianHi says video unavailable?

No, natural gas only

No, this is only for the GX natural gas Civic.

Natural Gas burns cleaner than gasoline but the CNG and gasoline cars do share a majority of their parts (engine and body) but they say the CNG engine will last longer with good maintenance. High and low pressure fuel filters and regular engine maintenance like on other gas civic you should have less problems than a gas car in my opinion. I really liked the 2011 CNG civics... the early generations 98-2000 have expired CNG tanks and no low pressure filter (so injectors could clog if you don't change the high pressure filter often) that gen has other issues that gas engines do too like rear main seal going out at 150k miles (I owned two 2000 CNG civics and both needed rear main seal) and it has timing belt so that's normal maintenance like on gas car too, the 2001-2005 civics I never owned but you can search online and see they had bad transmission problems so I'd stay away from those CNG civics unless they have rebuilt trans. The 2006-2011 were good looking and I thought the later year ones were solid like 2011 (earlier models had some cracked blocks - google it). The 2012 to 2015 I never owned but just search the car reviews online and read every negative review and find your self the best CNG year you can afford. Ask me anything else I'll tell what I know! :)

thank you very much for detail explanation, i was thinking buying civic CNG 2003 or 2004, that's the one i can afford to buy, what you think, thank again

Unless it recently had a rebuilt transmission I would NOT buy it personally from what I have read online.

There is a maintenance minder that tells you when to do it. I can’t remember off the top of my head. 30k?

Brian's Best Thank you

Hi Lorri, the EX is a different engine and fuel system so this GX video doesn't apply to your car. EX is gasoline, GX is natural gas (methane) like on your stove.

Hi, have you replaced the spark plugs, coils, fuel filters (there are two of them front and back), engine air filter, and possibly cleaning fuel injectors? How many miles does your vehicle have on it and what maintenance have you done to it?

ItsBrian thaks! i replace spark plugs, engine air filter, oil change and filter. only that. my car has 86 k miles and the maintenance i did it 15 days ago. but i read that is a frequent problem in a hondas civic 06-11?? that's true??

Have you owned the car since brand new? When was the last time you changed the fuel filters? If never then you should change them. High pressure and low pressure. I had another high mileage civic that got lower than normal mpg I changed the filters but nothing helped but it had over 180K miles on it. The next thing I was going to do before I sold it was have the injectors cleaned to see if that helped. It had a random rough idle and I replaced the coils (old ones had hairline cracks) and that fixed the idle but not the mpg.

Daniel Rivera use a 0w20 oil from Honda and you will see the fuel consumption

all filters filter out impurities. These filters from my non professional scientist knowledge of them filter impurities that are possibly introduced into the fuel tank and lines. Those impurities are mostly oil (from the fueling station compressors) and water. The filters allow the natural gas through the line to the injectors to be burned and keep out the impurities from being introduced to the engine to prevent costly repairs or damage. Better to replace a $70 filter than a $200 injector or something else.

Removes impurities in the natural gas before it goes into the cylinders.

+Matt Smith Your Honda civic maintenance minder on your car will tell you letters and numbers that will remind you when it's time to change the filters. You can find it here: owners.honda.com/service-maintenance/minder?year=2009&model=Civic-GX#mid^FA4659EW But some people say 10K miles, some say 30K to just change it no fail. If your filling station has oil blow by or allows contaminants to get into your tank then it's better to change sooner, if the company maintains their station then it shouldn't allow as many contaminants in so change later. If you have stutter or cold start that probably means you've had a lot of contaminants and change filter. To prevent that change sooner.

+Matt Smith On my 2006 (sold my 2009) I have pulled the high pressure filter since it is easier and saw NO OIL AT ALL so I figured the low pressure was clean. I really should replace the low pressure filter since I just bought the car used so at least I know that there is no oil in the low pressure housing then proceed to check high pressure housing every oil change to see if there is oil contaminants but I plan to do that soon.

+Classic Mustang yeah a Cng station could have blow by compressor oil anytime they forget to maintain their system so it could happen anytime and it is best to keep up maintenance on your cars filters for that reason. Check the high and change them regularly like Honda recommends. There is a low pressure aftermarket housing with a bleeder I am planning to do a quick video on that would be real easy to check the low pressure without taking the can off. Sorry to hear you got codes.

+Classic Mustang can you post an address, contact, and price for the injector cleaning from rc fuel injection? Thanks. I'm sure people would appreciate that

+Matt Smith I agree, it seems like your station is "clean". You should probably change the filters. I've talked to a few owners of this gen civic and some have not changed the filters in 50k miles with "no issues" yet. Others develop issues much quicker. From my understanding they added two filters after the 98-2000 year civic Gx Cng because the injectors were getting clogged by 50k miles without changeing filter, since it only had high pressure filter. So it helps to change unless you have a "perfectly" maintained fueling station - which don't exist

Hey Penny, there are very few shops that know how to do this...you would have to tell them how to do it. There is one guy in mission Viejo just search cng mechanic mission Viejo in yelp. But what I used to do is bargain with the Honda dealer but they usually stick at $130 for the change. Maybe you can work out a deal or get some other service added for free. Be aware they might tell you the canister needs replacing and try to charge you $$$. Hopefully they will just get it off no problem. let me know if you need anymore help.

Canister is just slightly pushed in and you're right they will probably push for canister replacement. I think I can get it off but I'm afraid it'll end up being like yours all pushed in. I will search for the place in mission viejo. Thanks

You're welcome. What area are you in? Honda dealers are not all the same when it comes to cng mechanics. Call them and ask if they have trained cng mechs! Do what I do ask around, call different ones and push to get a lower priced service! I think that mission Viejo guy might charge similar price...or try cngchat.com they have some good resources for DIY

I'm near Cerritos. Just got a quote from Mike's Advanced Auo in Mission Viejo. Part $67 + $95 labor. I think it's worth $95. I have another place in Bellflower that may do it but he wants to see the car first. I'm sure you can get the parts cheaper online but Downey Honda had the lowest price at $84 for LO pressure $48 for Hi side. Norm Reeves Cerritos wanted $94 LO part

The part is usually ~$70-$80 online shipped. Let me know what other dealers charge for labor. If it's closer to $200 you might just wanna do it yourself. Just get an extension and the right socket size. I'd shoot for $130-150 at a dealer see if they bite.

It's in the video: part number 16905-RNE-A00 please give my video a like

Part number is in the video and in the description...