No Hot Start , found the problem ....

[karlaw]

Originally Posted by onetinsoldier

I have a gauge on the fuel rail and it has about 55 lbs. I thought if vats was causing it, it would not let the starter spin ? is it possible to stop the injectors from working and not the starter ?

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[DRM500RUBYZR-1]

When you read the FSM, it states that a "No Crank Condition" can occur if the Vats protocol does not complete.
While they do not specifically state anything about fuel pump activation, I am under the impression that fuel pumps turn on as do other systems such as vacuum pump regardless of VATS, as I have witnessed fuel pumps etc. turn on even though the car would not crank.
You likely will not get pulse if VATs was unsuccessful as well.
These were empirical observations on actual no starts, so do not take it to the bank, except for the first line which is from the FSM and empirical.
Marty

[karlaw]

Originally Posted by onetinsoldier

Ok , after having a couple of days off to test some things ….. after a test drive , it would crank but wouldn't start as usual . So I decided to put my mechanical fuel pressure gauge on , a rag collected the fuel . Got in the car it starts right up , I shut it off , tried starting it again , no start . So I bled the fuel rails to Zero pressure , and it started right up . So then I checked the return line to see if there was a blockage , there wasn't . That only left one thing ….Injector failure . Injectors were locking up under pressure.



I replaced all 16 and no more problem ! Starts when hot !

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