need some help with a 20r (1 Viewer)

[berrett]

i have an '80 toyota truck with a 20r that i can't get running right. i got it from a friend that though the motor was bad and parked it for about 5 years. it has 150 psi compression in each cylinder. there was oil all in the air cleaner and i found the pcv valve was bad. i replaced the pcv and front crank seal. i thought it might not be getting enough fuel so i put a new pump in but it still doesn't fill the fuel filter up at all (maybe about 1/8" fuel in the filter when running. when you fire it up it will run on its own for about 5 or 10 mins. during that time i have adjusted the idle and mixture (it was way messed up). i can get it to idle around 900 rpm but it is kinda rough and stumbles a little (engine sounds great when reved up). after a couple mins it just slowly dies and won't run after that. you can get it to start and run if you keep your foot on the gas, but it won't idle on its own when warm. when it was doing this yesterday i needed to move it (after it was warm and needed my foot on the gas) but when put under load the motor didn't sounded like crap and it had absolutly no power (engine would kidna sputter when under load and i could barley move it even with the throttle pegged). i tried spraying starting fluid around the carb and it didn't do anything so i don't think there is a vacuum leak there. any ideas? i need to get this thing running.

 

[KliersLC]

sounds like a carb rebuild may be in order. They are really easy, so you can do it yourself no problem. It sounds like the truck will run with the choke on, but not off, and if this is the case your idle circuit is buggered up.

ALso, check the pickup filter in the tank or blow some compressed air back through the lines (gas cap off) to open it up a bit. THis may solve your lack of fuel in the filter problems

 

[Dave-T]

I agree check the fuel system from the filter back to be sure it's clear of buildup or debris. Could have got gunked up from sitting so long.

 

[WristPin]

yeah, carb problem. you got corrosion and/or debris in the needle and seat.

 

[4x4 Station Wagon]

I didnt want to start another thread since this one closely matched my current problem. I also have a 20r carb that runs out of fuel. It wont start on its own without starting fluid (pretty much 99% of the time) but then runs fine including idles fine until it runs itself out of fuel. I have a new electric pump that I pulled and ran fuel into a pop bottle just prior to carb so I am good to the carb. I am going to try and get to the seat but i dont want to rebuild the carb BECAUSE it is totally temporary as in a month or two until i can get an adapter for the 4.3 to r151. Any tricks to avoid screwing the gasket up?? Or am I dreaming?? Thanks

 

[4x4 Station Wagon]

Ok I pulled the top of the carb and checked everything. the needle looked good with no corrosion but I went ahead and cleaned it all up and flushed out a small amount of debris in the float bowl along with set the fluid level to the center of the window ?????? Now it totally doesnt run infact it bobbles and pukes until i pinch off the fuel hose and then when it finally is almost out of fuel (nothing showing at all in the window) it takes off and runs perfectly for about 5 seconds and then is dry and dies.

Any thoughts?

 

[Hilux]

20R carbs are not supposed to be real good... Or so I've read while researching the 20/22R Hybrid..

A 22R carb adapter, and a 22R carb should be easy enough to find...