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...That brings me to the main reason I posted this. When I hit overdrive around 45 to 55, I cannot accelerate for the life of me (maybe 1 mph per 3 to 5 seconds of time). I have stock gears on my '85 with 33 x 10.5's, which would explain for some slow acceleration but there's a catch.

I recently had a full tune up (plugs, wires, rotor, cap, fuel filter, diff's flushed and filled, idle was definitly upped a little bit) and my acceleration at this speed (45+) was MUCH better before the tune up.



OK, good before tune-up, slow after tuneup. Your answer is in there.
Maybe the timing is off. A spark plug wire on wrong cylinder?

- seen in FOUR WHEELER mag July 2006 & OFF-ROAD mag Feb 2007 -
'84 4Runner ARBed 5.29s F&R,4.7 & 2.28 t-cases,hy-steer,BudBuilt skid,30spl Longs,36" TSLs,Chevys

'83 P/U, Buick 231 V6,Holley 4 bbl,Weiand intake,Downey headers,TH350 w/700R4 gearset