Originally Posted by Echo SSEI
Originally Posted by Technical Ted
While he'* getting dinner (pot roast sounds good) can we clear up a few things.
#1 - I thought Vats wasn't an issue if the starter is turning over the motor. Yes? No? Different years do different things?
#2 - Will the engine start with a bad crank sensor?
#3 - Will the engine start with a bad Cam sensor?
#4 - Should there be dielectric grease under the coils to prevent corrosion?
Hmmmm.....good questions.....there are lots of reasons that the car may not start. I honestly don't have the answers to these questions at the moment and will need to research.
#1 - Not sure... I believe that it should cut power to the fuel system and starter... Might have to look into that one more..
#2 - It depends on what part of the crank sensor has failed if not both parts... I believe if the 3 x'* reference pulse is there it can start and run, but performance will be poor as well as effiency... We have rarely seen one part of the sensor fail... Usually the issue is intermintent or the crank sensor fails altogether..
#3 - Yes the engine will start with a bad cam sensor, even in the newer cars this is still a cylinder #1 TDC reference so that the PCM can gage the timming accurately to run in SFI mode... The engine will run with reduced effiency and performance
#4 - I have never seen the dilectric greas on any of the 3800 ICM / Coils... On a Quad 4 this is a diffrent story
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