Fuel Filter replacement

[Diomedes_]

Hi all,

So, looking to do some general maintenance on the car, as it has developed a some slight (related?) problems;

Three problems that I think are related.

1999 R34 GTR RB26

- engine will sometimes cut out while left on idle, but will keep going if I keep throttle input. Usually after having driven a while. Its random, somedays wont happen at all, others will happen once or twice in a half hour drive.

- Second issue is that while driving, the car will sometimes not be able to get past 3k rpm, no matter how much throttle input I apply.

- Lastly, car will sometimes be real laggy climbing through rpm, but if I apply lots of throttle problem will seem to clear and go back to normal.

All issues come and go, again somedays no sign of any problem, other days will just be stuttering around for ages.

 

I think it might be either the fuel system, or maybe the AFM?

 

Either way, I am going to clean the AFMs, and replace the fuel filter, use some injector cleaner in the next few fill ups, and might look at doing the fuel pump aswell.

 

Question I have, is filter such as;

https://www.efisolutions.com.au/pro-fuel-filter-30-micron-an8-orb-black

Fine to replace the normal filter? Their product page says as a prefilter only and not as the main EFI filter, so I'm guessing I would still need the stock one? Can I get an aftermarket one that has AN8 fittings to replace the OEM one? Or is the OEM one just something you have to live with?

[GTSBoy]

4 minutes ago, Diomedes_ said:

Or is the OEM one just something you have to live with?

What's wrong with the OEM filter. They do the job perfectly.

As to your actual problems. Stop driving the. Take it to a mechanic. If you actually do have a fuel delivery limitation and you are putting it under load, you could be killing it.

[Diomedes_]

25 minutes ago, GTSBoy said:

What's wrong with the OEM filter. They do the job perfectly.

As to your actual problems. Stop driving the. Take it to a mechanic. If you actually do have a fuel delivery limitation and you are putting it under load, you could be killing it.

Well, I want to  move to AN8 fittings, and the OEM has a barb.

 

And I plan on doing these things first, as I can do them, and if the problem persists after I will then take it to a mechanic.

[Dose Pipe Sutututu]

4 hours ago, Diomedes_ said:

Question I have, is filter such as;

https://www.efisolutions.com.au/pro-fuel-filter-30-micron-an8-orb-black

Fine to replace the normal filter?

Not fine enough, only good as a pre filter.

You need like a 10 micron.

FWIW I run a 40 micron pre filter then before the rail, there's a 10 micron (maybe finer, can't remember).

[Murray_Calavera]

Sounds like a good excuse to use one of these lol 

https://injectordynamics.com/id-f750-fuel-filter/

[Dose Pipe Sutututu]

29 minutes ago, Murray_Calavera said:

Sounds like a good excuse to use one of these lol 

https://injectordynamics.com/id-f750-fuel-filter/

I want to do this one day, remove the pre/post filter BS.

[GTSBoy]

6 hours ago, Murray_Calavera said:

https://injectordynamics.com/id-f750-fuel-filter/

Oh, me rikey very much.

[Dose Pipe Sutututu]

32 minutes ago, GTSBoy said:

Oh, me rikey very much.

Pressure delta gauge is pure pron. No guessing, no excuses.