Recent content by Doug

Our Ranger is alive. Looking at the signal from the crank sensor with a PICO scope, once we blew it up enough to really study it, we saw some noise in the waveform where it has the missing tooth. It was just enough to cause the ECM not to recognize TDC so it never fired spark. The older 4.0...

Just wondering if you ever figured out what was causing your no spark/no start issue, because I have an automatic 2011 Ford Ranger with the same conditions after replacing timing chains (cranks but won't start with the PCM not sending ground signals so no spark, but it does have injector pulse)...