Video - Stories from the Road, Saab 9-5 Trionic with Hiccups


Videa Saab 9-5 Stories from the Road, Saab 9-5 Trionic with Hiccups



Stories from the Road, Saab 9-5 Trionic with Hiccups

Automotive Robo-Tech was called to a shop with a 1999 Saab 9-5, with a 2.0 liter Trionic T7 engine and an intermittent hiccup problem. Occasionally, the engine will hiccup, but then continue to work properly. The shop could not find any problems, because no faulty codes were stored. At some point, the problem became worse and in one occasion, the tech could only start the car after 20 minutes of trying. The problem was now occurring on a regular basis. They observed that no spark was generated by the special Saab Direct Injection module, and concluded it was defective and needed replacement. Unfortunately, the owner had his car with the replaced module back the next day. It appeared that the problem was not solved. The car was then brought in for a thorough examination. Saab equips their cars with a special Direct Ignition system. The ignition system together with the ignition coils form a single package filled with transformer oil. It is placed directly on the spark plugs, without the need for a distributor nor spark plug cables. The DI system makes a camshaft sensor redundant, but a crankshaft sensor is still used. When an engine has no camshaft sensor, the position of the camshaft is not known during start-up. It is however still possible to let the engine run, by driving the injectors and ignition two at a time as in 1 4 and 2 3. To use sequential injection instead of DIS, adding a camshaft sensor would suffice. Saab however decided to follow a different path. Each ...

Saab, trionic, fuel, injection, automotive, technology, sensor, ignition, car, cars, auto, oscilloscope, meter, scanner, obdii, obd ii, direct ignition, auto repair, auto technology, engine, automobiles, educational, instructions

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