TB42s loss of power

[taslucas]

My TB42 has been getting ever so slightly down on power in the last few weeks.
Last night the old girl got real bad real quick. Will start fine and rev up but does not want to stay there idling. I have to keep feathering the throttle as the revs will just die down and stall. Occasionally it will idle with the hand throttle pulled out(but only up around 1500 rpm-- used to idle around 700 beautifully till yesterday) but then if I put it in drive it dies straight away unless I feather the throttle. It'll drive fine for about 1 minute then die. Feels like a fuel blockage?
I got a new filter this morning and fill fit that and have a look at carb this weekend. (carb was completely rebuilt about 18 months ago and been running sweet till yesterday).

[growler2058]

Have ya picked up some sh1t fuel mate


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[taslucas]

I'm usually one to think the worst when something happens to a car. But lately (especially since I got the patrol) Im realising that it's usually the simple solution and in this case it most definitely is. I removed the fuel filter and it was filthy. Also it was an aftermarket one and tiny compared to the standard original one. I've ran the patrol close to empty a few times lately and I reckon I've sucked up some crud from the bottom of the tank.
I put a small generic filter in to catch any more crud that's still in the fuel line and then will replace with the proper one after a few drives.

[taslucas]

The difference between what the previous owner had put in and what it's ment to have

[taslucas]

Pretty sad looking.....http://www.nissanpatrol.com.au/forums/images/imported/2012/10/47.jpg

[taslucas]

I reckon that's the problem!http://www.nissanpatrol.com.au/forums/images/imported/2012/10/48.jpg

[growler2058]

Looks like ya got a nice cheap fix mate :-)


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[taslucas]

Is it worth filling up the new filter with fuel before fitting? Or does it just take a moment longer to suck some new stuff through?

[taslucas]

Looks like ya got a nice cheap fix mate :-)


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Finally something fixed cheaply!! Lol

[growler2058]

Is it worth filling up the new filter with fuel before fitting? Or does it just take a moment longer to suck some new stuff through?

I wouldn't bother mate I wouldn't have thought yad get an air lock. Maybe if it was injected but not carby


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[taslucas]

Sweet, I'll just crank it till it roars into life:-)

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[threedogs]

Did the new filter fix the problem?? not sure on your carby but you may have a small inline one on the carby as well

[taslucas]

Did the new filter fix the problem?? not sure on your carby but you may have a small inline one on the carby as well

Haven't fired it up yet, having a BBQ lunch and the obligatory fresh Tassie beers:-).
I've read that the earlier MQ and MKs with the P40 petrol engine have an inline filter in the carby but I don't think the TB42 does....

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[patch697]

That looks alot like rust from the pics Lucas & if its come from your tank I'd say your copped some fuel with water in it. Petrol will float on water which leaves the water sitting in the bottom of the fuel tank to rust.

If you disconnect your supply line from your filter & using a rag wrapped around an air gun put around 2 to 3psi pressure in through the filler (fuel cap) you will be able to blow through all the cruddy fuel & once its empty you can splash some fresh fuel in & do the same to flush the tank & clear the lines.

Obviously this would need to be done with the fuel tank close to empty.

Also keep a fuel filter handy to do a swap in a week or two as it will probably suck a little crud through over the next few drives.

One more thing.... Check to see if you have a filter at the tank end of your fuel line?... Sometimes they get fitted there as well.

[Yendor]

That looks alot like rust from the pics Lucas & if its come from your tank I'd say your copped some fuel with water in it. Petrol will float on water which leaves the water sitting in the bottom of the fuel tank to rust.

If you disconnect your supply line from your filter & using a rag wrapped around an air gun put around 2 to 3psi pressure in through the filler (fuel cap) you will be able to blow through all the cruddy fuel & once its empty you can splash some fresh fuel in & do the same to flush the tank & clear the lines.

Obviously this would need to be done with the fuel tank close to empty.

Also keep a fuel filter handy to do a swap in a week or two as it will probably suck a little crud through over the next few drives.

One more thing.... Check to see if you have a filter at the tank end of your fuel line?... Sometimes they get fitted there as well.

If that doesn't work you may need to remove the fuel tank and give it a clean out.

Paul what are your thoughts on adding a little 2 stroke oil?

At least it might help add a protective layer to the fuel tank???

[threedogs]

Can't see how adding 2 stroke would coat tank, thinking that would just wash off.
If your plans are to keep Patrol for a while, do as suggested remove and clean inside properly.
You'll only get the same issues later and maybe more remote?

[patch697]

Paul what are your thoughts on adding a little 2 stroke oil?

At least it might help add a protective layer to the fuel tank???


I don't know Rod, I've not ever tried it. I'd think it would wash away pretty quick but it's worth a look all the same.

Given how clean the inside of a fuel tank is generally kept by the fuel unless it's been sitting for a while with water in it & the rust has a chance to bite right in, any rust that develops from cruddy fuel is generally only a slight surface rust. In some cases its enough to become a problem when mixed with the crap thet coursed it in the first place but once cleaned out generally doesn't cause any problems, I am talking in general terms here though.

I don't go right for removing the tank rather clean it first (re my last post) & if that doesn't fix it then I'll pull the tank out to flush out any shale & crap that might be sitting in the bottom.

Given the fact in Lucas's case his problems only occurred after he's last refill is why I suggested what I did as I recon he's picked it up quite early & there is a better than good chance no real harms been done.

[Yendor]

I don't know Rod, I've not ever tried it. I'd think it would wash away pretty quick but it's worth a look all the same.

Given how clean the inside of a fuel tank is generally kept by the fuel unless it's been sitting for a while with water in it & the rust has a chance to bite right in, any rust that develops from cruddy fuel is generally only a slight surface rust. In some cases its enough to become a problem when mixed with the crap thet coursed it in the first place but once cleaned out generally doesn't cause any problems, I am talking in general terms here though.

I don't go right for removing the tank rather clean it first (re my last post) & if that doesn't fix it then I'll pull the tank out to flush out any shale & crap that might be sitting in the bottom.

Given the fact in Lucas's case his problems only occurred after he's last refill is why I suggested what I did as I recon he's picked it up quite early & there is a better than good chance no real harms been done.

I was thinking it would need to be added every 2nd or 3rd tank.

Once the rust starts inside the tank it normally hard to stop it, maybe.....just maybe the 2 stroke oil might help with this?????.

I have been reading up a lot lately about adding 2T oil to diesel fuel and how some people have found when adding it to their tank for the first time it seems to clean out their fuel tank.

I thought your post was brilliant, I like the simple things..lol

Do the carby models run the sock on the end of the pick up in the tank?

[taslucas]

Cheers for the replies guys. I dont think it was just my last tank of fuel. Ive run it very close to empty 4 or 5 times in the last two months or so, so the crud has probably been there all along, i just havent sucked it up before.
I just fitted a cheap fuel filter and its the clear type. Im going to drive into town about 25ks then have a look to see what its like. If it looks good ill fill the tank up and change to the big filter at a mates place and hopefully not have to worry about it for a while. Ill check the filter again in a month or so to see how it looks.

Ive heard that its good to wash out a fuel tank with metho because metho is water soluble but will also evaporate. So it grabs the water and then evaporates away with it.

[patch697]

I was thinking it would need to be added every 2nd or 3rd tank.

Once the rust starts inside the tank it normally hard to stop it, maybe.....just maybe the 2 stroke oil might help with this?????.

I have been reading up a lot lately about adding 2T oil to diesel fuel and how some people have found when adding it to their tank for the first time it seems to clean out their fuel tank.

I thought your post was brilliant, I like the simple things..lol

Do the carby models run the sock on the end of the pick up in the tank?

Yeah mate they do but it still lets a certain amount through as you'd know & yeah I've heard the same about the 2T, I'd never had thought of using it as a cleaner in a petrol tank though.... Im keeping that one for future experimentation....lol



Lucas, Metho is a good way to disperse water in early non fuel injected models but its not safe to use in anything with a plastic fuel sell as it reacts with the material for some reason, just a bit of trivia for you.... all the best with getting your Delmer sorted, I thought I'd give you some food for thought but you seem to have it all well under control so I'll stop semi hijacking your thread.

Cheers
Paul

[taslucas]

Nah thats cool Paul. Always keen to learn more and thrash out any new ideas. I dont know much at all and I quite often miss the simple things right infront of me hahaha thats why i ask:).
I appreciate anyone taking the time to answer:)

[threedogs]

Now you know the tank maybe a bit dirty might be worth checking your fuel lines and vacuum lines
for condition, brittle etc. summer coming up and in the words of Forrest Gump. "one less Thang"
Your 4x4 needs to be as close to A1 condition at all times, do you have a drain plug on tank, 1/2 cup of metho
per full tank can't hurt either.

[taslucas]

We drive all year round here:-). Summer time is the easy time...the time to get ready for winter. I've probably got water in the tank from how hard it rains here lol.

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[threedogs]

True I was going to suggest a long range tank but you dont cross the ditch that often I take it.
Plus winter a shite time to be working on 4x4s

[taslucas]

Got a long range tank already. Tassies not a small as you think. But you'll see that when you come for a visit:-)

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