September 2021

SEPTEMBER 2021 AFTERMARKET 29 Combustion anomalies fall into three categories. 1: Ignition malfunction 2: Fuelling errors 3: Mechanical faults. The point is that we do not know which without extremely specific analysis. I am mindful of simply following simple fault codes as a means of a final decision. My final simplistic overview of the basic scope profile refers to the separation of primary and secondary separation. Taking the induction spike as the reference, to the left is primary responsibilities, and the right secondary responsibilities. 1: Primary responsibility , correct current flow during saturation (dwell). Therefore, correct voltage at coil pin 15, and a good ground reference at pin 1 which includes the power switching stage right back to battery ground pin 31, with prompt PCM current interruption at the TZ or ignition calculation point. 2: Secondary responsibilities , include the secondary coil winding condition especially its ability to resist internal shunts or leakage, the delivery mechanism, spark plug leads or coil extension towers, and the spark plug condition. Spark plug life is a contentious subject which seems to ignore the most common causes of failure; In and out combustion chamber environmental deterioration. This concludes part one of the topic. However, you should not forget other factors, such as the limitations imposed by current engine layouts. This includes poor access and greater reliance on serial data, both of which I shall consider in part two. our business! omising y compr footprint - without ALN RONME NVI our E e y Mak T el. v e a uniform high quality le o ensur tested t e oducts ar eman pr The r s. PN’ 00 ,32 ters star & ors er: Alternat e off o any alternativ ed t compar ange and co ers a far wider r ock Reman off Elst individually s 3,400 PN’ age erv k.com oduct. pr gy used in manufacturing the original cent of the ener per o 79 ving up t ocess; sa oduction pr man is a far gentler pr -e t the same time, r weaknesses in the OE solutions. A e vo o impr en allow us t v erse engineering skills e ver in-depth the business our ears of experience in With many y oc .elst www