Good evening Community, I have the following problem with my volvo. Volvo 240, first registration 1990 engine b230f Manual. Engine jumps cold and warm bad At cold start when the engine lights up once every time it runs on 3 cylinders. Even if the 4 cylinders does not run warm the 4 cylinders is not with. The following has been done. Error codes no ignition checked ok4 cylinders also ignite relay fuel pump OK Both pumps run 4 injection nozzles new temperature sensor new intake manifold seal new control times ok fuses checked I have the feeling that injection control device is defective. can I measure it? I can think of it almost differently!!