MudMachine88

Hey Guys.

I recently bought a 1992 Toyota 4Runner, VZN130, 3ZVE engine (RV6) Australian Model,
over the weekend i replaced the Valve cover gasket, and what a mission that was!!!
so i ended up replacing the two valve cover gaskets because they both had not been changed and were rock hard and fell apart in my hands when i took them out.
I also replaced the intake manifold gasket at the same time.
when i pulled the throttle body off the gasket for the throttle body and the intake manifold, the gasket broke in half.

So what i ended up doing was using a high quality shock resistant gasket compound to replace the throttle body gasket.

when i started the engine back up it ran fine for about 30 mins, and then when i came back from my test drive, i pulled up in the drive way and the idle dropped from 900rpm to about 500rpm and kept surging around 600-500rpm

So im concerned that maybe that gasket compound is not holding properly?
I have ordered the original throttle body gasket from Toyota which i pick up next week,

But besides all of that the engine runs great and no other problems.
and whats happening now, after an hours drive home from work, i will get to to the end of my street and it will start surging around 500-600rpm, but the whole drive home it drives perfectly, its only till i start to slow down that it starts surging.

any help or advice would be greatly appreciated
admin, if this is in the wrong thread, please feel free to move

thanks in advanced
​James