What to expect from a fuel filter change

[TechnoLoGs]

I have the fuel filter on the S10 ready to go, an AC Delco unit. EricTheCarGuy says that you will likely increase the volume of fuel, even if the pressures stay about the same. I know it has an odd-shaped line flare nut that needs a special wrench, other than that it should be super easy. There is some rust on the areas arounn my lines but it appears to be surface rust.

I suppose I am asking if changing a fuel filter will make a marked improvement in driving, moreso than tank fuel cleaners and additives? And how does the filter not get clogged up, I have been using minimal doses of Redline and it appears to be helping consistent with what I put in in smoothness. Will a new filter clog?

Applying the information in the below video, in a Subaru diagnosis, to the first vehicle in my stable.

 

[Realtech214]

When i change mine i didnt notice any difference but i knew there was a clean filter on there. So i was happy

 

[SLCraig]

Originally Posted By: Realtech214
When i change mine i didnt notice any difference but i knew there was a clean filter on there. So i was happy


This is my experience as well.
I honestly believe it only needs to be done like once in the average vehicle's life.
Some cars I owned which I bought at like 150K miles had never had it changed, and still running fine.

 

[RF Overlord]

Unless the filter is clogged to the point that fuel flow is reduced below what the engine requires, you won't notice any difference. Installing a new one is part of a proper preventative maintenance programme, not to improve performance, but to help ensure you don't have issues.

 

[redhat]

Keeping a clean fuel filter on a vehicle reduces the amount of labor on the fuel pump which could save you from having to replace it down the road.

 

[DBMaster]

I suspect that the filters on gas pumps catch the majority of particulates so your vehicle's filter doesn't have much left to catch. I did change the one on my daughter's 99 Infiniti I30 last year. It hadn't been changed before (the car was my dad's). The stuff dripping out of the inlet was pretty nasty, but the car did have over 200,000 miles on it.

 

[Burny]

I still have the original one on my 1991 Toyota 4runner with 261,000. Replaced fuel pump once around 140,000. Did crawl under to grease it a few weeks ago and it looks like it is about rusted out. Will replace it soon due to that. I'm sure the bolts are going to be [censored] to get off. Need to start hitting it with PBlaster.

 

[beanoil]

I've never found a fuel filter replacement to buy me anything except peace of mind. I've had two company cars now where the filter is in the tank, and never got replaced. 225k miles on one, 147k on the other.

 

[TFB1]

Originally Posted By: RF Overlord
Unless the filter is clogged to the point that fuel flow is reduced below what the engine requires, you won't notice any difference. Installing a new one is part of a proper preventative maintenance programme, not to improve performance, but to help ensure you don't have issues.


^^^^^This...

 

[Kira]

Hello, Years ago, after replacing a fuel filter at a vehicle's 100,000 mile mark, I found the old was full of water. I concluded there was a "treated felt" inside the filter which blocks water-like a camper's fuel stove funnel. Alcohol attaches to fuel molecules at one end and water molecules at the other. It's how dry gas works. I realize it's weak, disjointed data but I change it every 50,000 miles. Kira

 

[JHZR2]

what to expect? A mess!

 

[TechnoLoGs]

Originally Posted By: JHZR2
what to expect? A mess!


I'd try to change it out fast, and when the engine isn't warm, due to fire.

JHZR2, I'll try to do it after I get the truck back today. The engine still turns, so how could two cylinders be seized, and nothing broken? I dont get it!

 

[surfstar]

Originally Posted By: SLCraig
Originally Posted By: Realtech214
When i change mine i didnt notice any difference but i knew there was a clean filter on there. So i was happy


This is my experience as well.
I honestly believe it only needs to be done like once in the average vehicle's life.
Some cars I owned which I bought at like 150K miles had never had it changed, and still running fine.


Same experience here.

Replaced it on the used Civic at 142k miles. No change, just preventative as the only fuel filter it will get for the rest of its life. Vue doesn't have a serviceable filter, which I like, b/c there's no reason to wonder if it should be changed.

 

[The_Jeff]

Originally Posted By: TechnoLoGs
Originally Posted By: JHZR2
what to expect? A mess!


I'd try to change it out fast, and when the engine isn't warm, due to fire.

JHZR2, I'll try to do it after I get the truck back today. The engine still turns, so how could two cylinders be seized, and nothing broken? I dont get it!


I'd be happy to out driving again! We used to have a guy on this board who was always doing piddly small stuff to his volvo while ignoring big things like his timing belt...

I know it's good to get this free and new to you truck up to snuff, but I'd drive it on its new head gasket for a week before buying any more parts.

 

[zzyzzx]

Originally Posted By: Realtech214
When i change mine i didnt notice any difference but i knew there was a clean filter on there. So i was happy


Same here. If you can notice any difference, then you kept the old on in too long.

 

[TallPaul]

I find that if you change the fuel filter every 10,000 miles the old ones have a fair amount of resistance when you blow through them compared to new filters. I am for changing them frequently to avoid over working the fuel pump.

 

[95busa]

I have noted everything from nothing, to running WAY better. I just changed the factory fuel filter out on my 07 Mountaineer. I noted better throttle response and smoother running. When I change them every 30-50K, I really don't notice anything. This one had been on there for 74K. I have changed factory fuel filters on vehicles with over 120K, for example my dad's '93 Ram 2500, 318 Magnum and my father in law's 93 Dakota V6 Magnum. On both of these vehicles the difference was dramatic. Performance improved night and day, and the trucks actually sounded different. My father in law asked if I had put a hole in his muffler it sounded so much louder. In short- if you change them on time, not much different. If they are on there too long- mild to dramatic improvement.

 

[Kuato]

Originally Posted By: RF Overlord
Unless the filter is clogged to the point that fuel flow is reduced below what the engine requires, you won't notice any difference. Installing a new one is part of a proper preventative maintenance programme, not to improve performance, but to help ensure you don't have issues.


Correct. With no restriction on the old filter, the new one won't change things, performance wise.

 

[KrisZ]

Originally Posted By: TallPaul
I find that if you change the fuel filter every 10,000 miles the old ones have a fair amount of resistance when you blow through them compared to new filters. I am for changing them frequently to avoid over working the fuel pump.


That's because the filter media is wet in one and dry in the other one, not because the one with 10k miles on is clogged.
Soak the new filter in fuel and then try blowing through it, I bet the resistance will be very similar to the old filter.

 

[Donald]

If the fuel filter is under the vehicle, then I would suggest spraying some PB Blaster on the fittings ahead of time.

When I had fuel filter problems then Suburban would get to the point where it would not go forward. Turn off the engine and let things settle for a minute and off it would go for awhile.

My problem was letting the vehicle sit for several years (divorce).

I would say a normally driven vehicle buying gas at reasonable gas stations (not one where its the only station for 100 miles and has not changed over to unleaded yet) will not encounter fuel related problems.