have the head checked for warpage. Maybe even send it in for a rebuild. At the very least have the valves reseated and the head resurfaced. Make sure they torque the stock head gasket to 70-75 ft lbs. Depending on your money get ARP head bolts or ARP head stud kit. Have the intake cleaned out, most likely it's got plenty of residue built up inside, as well as the throttle body. Others may have suggestions as well, but thats what I'd have done at the very least.
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1989 N/A Targa 5spd. Metallic Grey, w/grey interior. No mods done.
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