EMISSION TRAINING

                                                  Screen shots taken with the iGA5

                                                                         (Click on thumbnails to enlarge)

 

                 Chevy 7.4 with a hard hot restart                        Chevy 7.4 with two new injectors

                 1: This is a graph of a Chevy 7.4 with a hard hot restart. Note the yellow trace hits 5098 PPM. This shows that too much fuel has entered the combustion process. Note the purple Lambda trace is .8694 showing this is a fuel injection problem. Two injectors were leaking fuel.                    2: This is a graph of a Chevy 7.4 with two new injectors. Note the yellow trace hits 646.1 PPM. Note the purple Lambda hits 1.1.

 

                 Cadillac shorted injectors                        vehicle no start

                 3: This Cadillac had three shorted injectors. Each rise in the graph shows when a cylinder was killed. Note the yellow HC trace. There are three humps that are lower that the others. These are the cylinders with the bad injectors.                    4: This vehicle had a no start. Before the hood was opened a gas sample was taken. Note the red CO trace only hit .01863%. This shows there was a lack of fuel present during combustion. The fuel pressure was then taken and the reading was only 5 PSI. The fuel pump was no good.

 

                 vehicle no start                         gas sample engine cranking

                 5: This vehicle had a no start condition. The yellow HC trace hit 228.4 PPM. The red CO trace hit .02372%. The purple Lambda trace hit 23.74. This engine had no fuel or spark.                      6: This gas sample was taken when the engine was cranking. Note the yellow HC hit 23640 PPM, the red CO hit .4441%, and the purple Lambda hit .8237. This vehicle was flooded.

                 vehicle at crank

                 7: This sample was taken at crank. Note the yellow HC hit 30080 PPM, the red CO hit .02844%, and the purple Lambda hit .7625. This shows there was no spark. When this coil was tested it was good. The spark plugs were removed and were wet with coolant.

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Automotive Test Solutions is a multi-national award winning company for innovative thinking that produces tool solutions for the automotive industries.

Established in 2001, ATS manufactures oscilloscopes, OBD II generic scan tools, ignition analyzers, gas analyzers, misfire detectors, pressure transducers,

engine simulators, diagnostic stands, leak detectors, and a number of high tech training products to serve the automotive technician.