03 LB7 cranks forever?

[SHOTZY]

My friends lb7 cranks for @ 8-10 sec before starting. Rail press slowly builds and then starts. Checking filter and housing now. Also rail press spiked during logging to 11000. then it returned to normal. Possible FPV? Injector going bad? Balance rates are perfect. No codes present.

 

[madmatt]

balance rates can be good but injectors can still be bad enough for a hard start condition. Can you max out the desired rail pressure and monitor the actual pressure? if there is much difference, it's ready for injectors. I have seen a few cases of weak pumps cause hard starts too but that's much less often.

 

[SHOTZY]

Thats what I wanted to know. Can we command max rail press with efi or do I need a tech 2? Thanks for the help.:thumb:

 

[madmatt]

Either will work but I prefer to use the tech 2.