My 97 was running rough so I took to a guy that has a diagnostic tool.(computer) He said the cylinders 4 and 8 were throwing a misfire code. Said the injectors were probably bad. I bought a used spyder assembly and changed it today. Put a new gasket on the upper manifold and started it up. The thing runs worse then ever. Barely idles and will not gain RPMs with the throttle depressed. Does something need to be reset? Can the spyder assembly be tested out of the vehicle. I'm pretty certain I put every thing back together correctly.