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rough idle for few seconds after startup

Why?

If he makes sure the upper injector metal push on keepers are still there and in place it will not leak. He is just pulling the rail, so he can switch the power on (but not start) to check the injectors ends for leaks at the tips!

Be sure to buy a set of injector o'rings, to replace the o'rings before you re assemble it. Also a little motor oil on the o'rings is a must when you reinstall.

Oh.. i thought he was changing the injectors...
 
Oh.. i thought he was changing the injectors...

Well I guess if he finds a leaker in the test, that would be next, in which case it would be prudent to follow your advise and bleed the fuel rail at the access port.
 
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