i had the same prob with mine turned out both head gaskets were leaking and the plenum gasket had a 2 inch sec that was blown out on the back side causing the trk to run way rough and also overheat after a few miles . did a complete top end rebuild had the heads machined trk runs great now . cheap repairs and well worth it . total was right around 300 . would do it again if i had to
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1990 Toyota 3.0 SR5 fully loaded
6 inch lift 33 12.50 15 tires
Pioneer sound sys 12 inch sub 1200 watt amp
