Humvee has replaced injector pump--air leaking in somewhere

[gem1410]

I replaced the injector pump on a 6.2--old pump had a fuel leak that filled the valley but engine did run well--put on new pump and engine ran well for a short time and now misses as if air is getting into fuel line--bled all injectors still has rough idle--Is there a way to bleed the pump at the rubber line where the injector fuel return line is--thanks George

 

[ken]

Is the pump you installed a rebuilt pump? To answer your question, No the return line is just that. It is open to the on the other end in the fuel tank. You may still have some air in the supply line from the tank. Try bleeding again. You mey need to run it at a higher PRM until it smooths out.

 

[infidel got me]

As suggested, drive it like you stole it. Air will eventually find its way out...

 

[1 Patriot-of-many]

Put a clear line on the pump to return line. If you have a bunch of bubbles it's obviously drawing air.