Great Diagnostic Waterfall

Great Diagnostic Waterfall Amazon Printed Books http://www.amazon.com/gp/search/ref=sr_nr_p_n_feature_browse-b_mrr_0?rh=n%3A283155%2Ck%3Astories+from+the+road%5Cc+mandy+concepcion%2Cp_n_feature_browse-bin%3A2656022011&bbn=283155&keywords=stories+from+the+road%2C+mandy+concepcion&ie=UTF8&qid=1360007005&rnid=618072011 Amazon Kindle Edition http://www.amazon.com/s/ref=sr_nr_p_n_feature_browse-b_mrr_1?rh=n%3A283155%2Ck%3Astories+from+the+road%5Cc+mandy+concepcion%2Cp_n_feature_browse-bin%3A618073011&bbn=283155&keywords=stories+from+the+road%2C+mandy+concepcion&ie=UTF8&qid=1360007050&rnid=618072011 Android APPs https://play.google.com/store/search?q=stories+from+the+Road%2C+mandy+concepcion&c=apps Automotive Robo Tech was called in to a shop, for a complaint of erratic engine operation on a 2007 Jeep Grand Cherokee, with a 5.7 Liter engine. The engine would run fine with no problems for a while, but at any given moment it would begin to abruptly surge up and down and cut out. The engine could be immediately restarted and, would run perfectly again until the next episode. The shop had installed high performance spark plugs and ignition coils a few weeks earlier, but there were no drivability complaints at the time. When I arrived, I attached my generic OBD II scan tool to the vehicle to check for codes. None were recorded in memory. I started the vehicle, and it seemed to run okay, but then it suddenly started to run erratically with a bouncing tachometer. The engine seemed to dip in and out, with a near stall condition. After a few seconds of this, the engine just cut out, as if the ignition key had been turned off. I immediately restarted the engine, and the problem was gone. I ran it again for quite a while, and could not reproduce the problem. It was as if the crank or cam sensor was giving an erratic signal, or the ECM had an internal circuit issue. I could no longer reproduce the problem, so I offered the garage an opinion. Try a new crank sensor due to their high failure rate. It would be a cheap fix if it worked. The shop called back the next day, and told me that the crank sensor did not fix the problem, and that they had rechecked all the ECM power and ground feeds. The shop was willing to try a ..... Ok what happened next.... Get the story right now in this video..... Learn and have loads of fun. Entertainment and knowledge at the same time, so watch it now.... Presented using advanced software CG animation and editing technology to help you understand. Part of our Automotive Technology series shown here on this channel. Enjoy... ************************************************************************************** Amazon Printed-Books & Kindle: http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dstripbooks&field-keywords=mandy+concepcion Google Play Android APPs: https://play.google.com/store/search?q=mandy+concepcion&c=apps Amazon Video DVDs: http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dmovies-tv&field-k