My 98 C70 cranks but won't start. Have replaced the fuel pump and relay, crank shaft sensor, cam shaft sensor, distributer cap and rotor, and air mass sensor. The timing belt indexing was checked. Supposedly the ECM is OK. A recent diagonsis was that the ECM could not communicate with the engine. Now it is at the Volvo dealer getting the $80/hr diagnostics. Anyone have a similiar experience? It certianly leaves a bad taste.