V6 has a slite miss

[hacksaw]

I have an 88 SR5 regular cab 4x4 with the V6 engine.  The engine runs great, does not smoke, does not rattle, has great power, but has what seems like a very slite miss through out the rpm range.  The engine only has a slite "shake" to it at idle speeds and you can realy only hear a very slite missing sound from the tail pipe.  If you hold the throttle at different rpm ranges steady you can hear the engine go back and fourth from a miss to a non miss.  I have changed the plugs, wires, cap and rotor, fuel filter, and air filter.  I have also installed a new stock muffler and there is still no change.  Like I said before, no smoke, no noise, and perfect looking old plugs when I changed them.  But it still has that little miss???  I need help it is driving me NUTTSSSSSSSSSSSSS!  Thank you.  Email [email protected] for a possible fix idea?  Thanks

[toyrokcrwlr]

Vacum advance hose are cracking and leak air, try looking at all the little hose going into the intake.

[mr4x42u]

yea,,i would look for a vaccume leak also..a vac gauge should find it,,if you have a leak you should have unsteady vac..