TTORA Forum banner

'84 Toyota 4x4

526 Views 5 Replies 2 Participants Last post by  lesdane7
This truck is literally a "barn find" for real. 28K original miles sat with 1/2 tank of gas for almost 35 years. I pulled the tank and replaced it, along with the pickup tube assembly and hoses, gauge sending unit, and new filter. Blew out lines at the tank connections all the way to the front, all good. Put gas in and it cranked up as soon as gas got to the carburetor. Running rough and found #3 & #4 dead. Checked fire, good. Checked compression , 180 across the board. Checked fire at the plugs with a spark tester, all good. Moved the plugs around and never changed a thing. Pulled the valve cover, everything as it should be. Checked for vacuum leaks, nothing. I'm 69 years old and been a mechanic for a very long time, but I have to admit I'm stumped. What am I missing?
1 - 6 of 6 Posts
If you confirmed spark, fuel and air, I'm at a loss too. You said you pulled the valve cover. Did you rotate the engine to make sure the intake valves were opening? I assumed they were if your compression checked out.
Yes sir, we did. Roller it over and confirmed a little lash at each rocker, and observed every rocker going up and down, but I already knew they would.
Yes sir we rolled it over and confirmed a little lash on each rocker. I’m at a loss now……
I leaning towards a vacuum leak that the carb cleaner didn’t catch. That’s the only thing 3 & 4 have in common. I did put a rag over the carb but it choked it down, so I’m bewildered…..
Well I take some of that back. They do have the carburetor in common but I don’t think it can starve only 2 cylinders….
1 - 6 of 6 Posts