Motions9985
New Member
- Joined
- Jun 2, 2002
87 GN 40K miles. 37# injectors, Hooker exhaust system, alcohol injection, Fuel pump and ect. Car has been running great. All of a sudden started back firing. Did compresson test 35 psi on 5 cylinders. Took engine apart. Timing chain and gears OK, head gaskets OK. Found a resin type material on intake valves, intake runners, and on pistons. It is difficult to remove material. Engine has never been apart as far as I know. Any Ideas what material is