jsosh26.....76LandCruiser...SHUSH......
- Thread starter jsosh26
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New tank =greater concern from me. Metal or plastic?
This can be a bit dangerous but I would get some sort of squirt bottle a get the truck running with that. Keep it running with the squirt bottle for several minutes. If the fuel pump does not pick up then you know you still have a problem. Don't do this if you are getting any backfire through the carb.
Honestly, I have never had to change the fuel pump on a Yota 6 but on other makes it is possible to install the dump with the lever under the cam lobe and get no pumping action. Hope that's not the case here.
This can be a bit dangerous but I would get some sort of squirt bottle a get the truck running with that. Keep it running with the squirt bottle for several minutes. If the fuel pump does not pick up then you know you still have a problem. Don't do this if you are getting any backfire through the carb.
Honestly, I have never had to change the fuel pump on a Yota 6 but on other makes it is possible to install the dump with the lever under the cam lobe and get no pumping action. Hope that's not the case here.
Make sure there are no kinks in any hoses. I ran a straight inlet/outlet filter for over a year not realizing that the straight inlet was kinking the hose. I switched to a 90* inlet and straight outlet and solved the poor idle/low end situation.
- Thread starter
- #144
Definitely didn't crank it long..will try this in the am.
Tank is new and metal and fuel is flowing freely to the pump, it's from pump to carb it has now vacuum.....I think bc I haven't generated enough cranking for suction to start.
ran my finder along every millimeter of line/hose today and it all looks good.....so no issues there
it's one of 2 things
1. the pump doens't have vacuum bc I haven't given it time to generate enough to start a 4-7 psi OR
2. holy mother of newbie mistakes....the cam lobe is not lined up right with the arm of the pump and ill be
when I have to remove it to find out.....(this is DEFINITELY option B)Thanks for all the advice and help guys...ill continue tomorrow...also greg suggested removing the line from pump to carb to see if I get gas, feel pressure...didn't get to this but will tomorrow.
- Thread starter
- #146
officially freaking out
https://forum.ih8mud.com/40-55-series-tech/424341-cam-lobe-wear.html
cam lobe discussion link above....his wore out and they are discussing $500 in parts and removing the bib, radiator, and God knows what else to avoid removing the engine to fix it........i need a drink
apparently if they wear worse with bad, low, wrong oil in the engine...duhh
but I wonder if the one actuating my pump is either misaligned or bad (slipping)
praying that I can get her cranked tomorrow....babysitting as I type or I'd be in the garage
https://forum.ih8mud.com/40-55-series-tech/424341-cam-lobe-wear.html
cam lobe discussion link above....his wore out and they are discussing $500 in parts and removing the bib, radiator, and God knows what else to avoid removing the engine to fix it........i need a drink
apparently if they wear worse with bad, low, wrong oil in the engine...duhh
but I wonder if the one actuating my pump is either misaligned or bad (slipping)
praying that I can get her cranked tomorrow....babysitting as I type or I'd be in the garage
Didn't read the thread but I'd be surprised if the cam lobe is worn out. You can use a vacuum guage to see if it's pushing any vacuum on the output side of the fuel pump. I have one you can borrow, or you can get a cheap one at autozone that would do the trick just fine.
Thinking while I type, but IIRC you could pull the pump and stick a screwdriver down in there to feel the gear on the cam that drives the pump to make sure it's now gone. I think I remember feeling the gear engage last time I did one but it may have been a decade now...
I've not seen the pump , but if it's a lever-driven one like the other Japanese cars I've had, the lever would ride on an eccentric on the cam and any GEAR on the cam would be used to drive something other than the pump (distributor, etc.). Having not seen the pump, I certainly could be wrong, but that's the way the ones I've replaced worked. That being said, with no more pressure on the cam than a pump puts on it, it's hard to imagine wearing through the case hardening and wearing the fuel pump lobe off of it.......if the PO's ever changed the oil in it, that's not likely to have happened.
- Thread starter
- #152
Yes Sir....well kinda...it was cutting out.....occassionally after 30 miles it would shut off...totally dead after acting starved...then it would crank back up....that coupled with the uncomfortable feeling of fuel flowing under my crotch pushed me to where I am now.
you are exactly right from what I have been reading the past 2 weeks....it's on an eccentric not ACTUALLY on the cam shaft. The cam shaft drives the dissy, etc., and indirectly runs the pump. I HOPE you are right and truly believe I just need to crank the heck out of the battery to get more vacuum....there is fuel right at the pump I just don't think ive given it time to prime.
talk to po last night....mech was working fine, but doing what was described above and so he went to an electric thinking it would work better pushing fuel than pulling it...he had a toy mechanic put a new tank, fuel filter, lines, last year......I am beginning to suspect I need to look more closely at my carb...I have a factory one I can install....I am beginning to wonder if the gasket bn the carb and manifold is bad...I saw gas there yesterday
- Thread starter
- #153
aaaaaaHAAA......I think......
Ok I cranked and cranked and my battery is almost dead....I did notice one thing.....when I got her turned over I saw an ever so slight amount of light white smoke coming from the gaskets im pointing to...the lower one is to the exhaust so that makes sense...the upper though...do I have a VACUUM leak and THAT is why it isn't getting suction for the fuel pump???
I have a new carb in a box and could just replace it with new gaskets etc. if yall thought this was it....the PO said last night that everything worked he just wanted to push fuel not pull it EXCEPT for the random chugging for gas and shutting off for 15 minutes....I wonder if that gasket was getting hot and expanding so that there wasn't enough vacuum????
thoughts, ideas, stupid comments, jokes?
Euclid if you want to come over this afternoon and see what im talking about I would love another opinion....or anyone else interested.....PM me for directions......im close to the spillway-old fanin area. It will take 10 minutes and we can drink a beer and ponder the cosmos.....
Ok I cranked and cranked and my battery is almost dead....I did notice one thing.....when I got her turned over I saw an ever so slight amount of light white smoke coming from the gaskets im pointing to...the lower one is to the exhaust so that makes sense...the upper though...do I have a VACUUM leak and THAT is why it isn't getting suction for the fuel pump???
I have a new carb in a box and could just replace it with new gaskets etc. if yall thought this was it....the PO said last night that everything worked he just wanted to push fuel not pull it EXCEPT for the random chugging for gas and shutting off for 15 minutes....I wonder if that gasket was getting hot and expanding so that there wasn't enough vacuum????
thoughts, ideas, stupid comments, jokes?
Euclid if you want to come over this afternoon and see what im talking about I would love another opinion....or anyone else interested.....PM me for directions......im close to the spillway-old fanin area. It will take 10 minutes and we can drink a beer and ponder the cosmos.....
OK, put the electric pump back on and make sure everything is OK. I am a fan of the mechanical fuel pump on the FJ-40, but I have no problem with electric fuel pumps.
If everything runs fine with the electric pump, you have essentially eliminated all the problems but the mechanical fuel pump.
If everything runs fine with the electric pump, you have essentially eliminated all the problems but the mechanical fuel pump.
The pumping action of the fuel pump has nothing to do with any external intake or exhaust gaskets. The pump itself acts independently of those. Next, the action of the accelerator pump in the carb will take you from idle to off-idle (higher) RPMs where the vacuum of the engine works through the venturi effect to pull fuel / air into the engine.
Based on what all you have said, you've cranked it enough to where there there should be fuel already entering the carburetor PROVIDED (a) your mechanical fuel pump isn't somehow installed incorrectly (not likely, unless you figured a way to get the lever situated on the eccentric where it's working against itself, rather than pumping) (b) your new mechanical fuel pump isn't defective out of the box or (c) your accelerator pump isn't bad. Now, you could have any of a MULTITUDE of things wrong with the carb itself (and if you have a new one, why don't you just go ahead and install it and take that variable out of the equation?), but as far as fuel delivery goes, you've got an exceptionally short route that's quite uncomplicated, and if the mechanical pump is installed correctly / functioning properly, you should have fuel to the carb by now........heck, if you got it started by pouring fuel in the carb, that should have provided enough pumping action to make up for a lot of starter cranking.......keep us informed
- Thread starter
- #156
here we go again.
Agreed...I think after 8 cranks it should have begun a vacuum. I did it until the battery died this am and still nothing.
here is what I know
1. Lines are good
2. Tank is good
3. carb is good enough to crank and run when given fuel
There is fuel up to the pump, but not being pulled into it or sent to the carb
as DNP stated..it ain't that hard...it's a short system with out many complications.
I think I have isolated it to one possibility.....take the dang thing back off and see what is going on....see if I can see the eccentric inside, or even if I need to take apart the pump to determine if it's jacked up.
Agreed...I think after 8 cranks it should have begun a vacuum. I did it until the battery died this am and still nothing.
here is what I know
1. Lines are good
2. Tank is good
3. carb is good enough to crank and run when given fuel
There is fuel up to the pump, but not being pulled into it or sent to the carb
as DNP stated..it ain't that hard...it's a short system with out many complications.
I think I have isolated it to one possibility.....take the dang thing back off and see what is going on....see if I can see the eccentric inside, or even if I need to take apart the pump to determine if it's jacked up.
- Thread starter
- #157
AHHAAA im an idiot....think the problem is that I used a spacer NOT a gasket on mine....the haynes is vague on what to use for a specific year and autozone said (link to pic) was my gasket, but it's a SPACEr which the old pump didn't have...
so maybe my arm isn't even NEAR the damn eccentric due to this spacer screw up?
https://forum.ih8mud.com/40-55-series-tech/446593-76-fuel-pump-gasket-help.html
so maybe my arm isn't even NEAR the damn eccentric due to this spacer screw up?
https://forum.ih8mud.com/40-55-series-tech/446593-76-fuel-pump-gasket-help.html
- Thread starter
- #158
She is running like a top.....the 76 model just needs 1 gasket no spacer like I had installed. The fuel arm was probably a 1/4 inch from the eccentric. Thanks to all for the advice and to Euclid and Andy for coming over to help me trouble shoot it.....id go for a drive but im in the closet with our livestock, a crying baby, the wife, and mother in law listening to straight line winds.....Happy freakin new year!
Njoyed hanging this afternoon. You and andy both did good and have a great start for the land cruiser sickness.
- Thread starter
- #160
ALWAYS have a cold beer for you....your my new vault for cruiser help! been reading up on that front end rebuild so my axle doesn't run dry...probably the next project after I get the bed cleaned up and repainted......which FINALLY starts tomorrow after getting side tracked on
1. rear heater bypass
2. fuel pump issues
3. my wife wrapping the angle grinder I bought a month ago to originally start the rust reversal inside the tub
then it's rear main seal, transfer case.......it never ends....I love it
