heres one that almost fooled me into thinking timming belt . I plugged in scantool read codes only was S1S1 A/F sensor heater ciriut . I seen tach raise on crank and looked at scantool seen 78 rpm while cranking , this car was driven prior to the no start condition and was running this was first attempt re start after sitting for a day. customer complaint was hesitation and rouf idle once in awhile. I checked for spark and fuel injector signal they were present but noticed spark wasnt constant . I knew then possibile crank sensor problem i replaced and it started . I wish i had re looked at scantool rpm to see if it raised and tach i beleive 200 rpm is a standard cranking speed to start. 160.00 for A/f Sensor (ouch ) customer ordering his own on rockauto
