oldkimmer

...........Hi there, my buddy has an 03 all factory stock with less than 200,000 kilometers on it, ...lately it wont start warm...........it starts fine cold and after sitting till it cools off...........it just cranks without even trying to fire....I should say that it runs normal from cold start no problems of any kind till shut off then no start....thanks.........kim...

Jeff in TD

Measure return flow from injectors, maybe?

BigIron70

You need to monitor your fuel rail pressure when cranking over engine. Excessive leakage of fuel will not allow pressure to build high enough for ECM to turn on injectors. When the engine is cold the fuel pressure builds high enough to turn on injectors. You can try re-tightening HPC tubes, theses tubes make direct connection to the injectors by use of a tapered seat on the injector. When they become loose the high pressure fuel leaks out and will not build any pressure in the fuel rail. This video shows some tests that need to be done to diag. your no start hot problem. At 5:16 shows tighten HPC tubes, torque these to 37 ft. lbs.

Jeff in TD

Good video. If return flow is high, hopefully it is as simple as torquing the fuel tubes, but it may very well be high return flow from injectors.

oldkimmer

..............Thanks guys i'll put him on to this thread.....kim...