Passenger side-bolted to the engine. The fuel lines are a very heavy duty stainless steel and are difficult to work with as they are hell to bend! Also the pumps have a thick rubber cover over them to muffle the noise they make. I thought this was a pretty cool picture of the 5.0L engine too.



Couple of other things? One pump for each side of the engine. There is ONLY one high pressure fuel sensor and it's mounted on the passenger side fuel rail at the back of the engine. This means we have no way to determine if the drivers side pump is working or what it's putting out pressure wise. Now why it was designed this way I can't say?

I have cracked the fuel line fitting a bit and cranked the engine to test the driver side but that is NOT any kind of approved method and just something I did to verify to myself that I had fuel pressure on both banks of the engine.

I would make sure you have no battery/voltage problems before attacking the gear driven fuel pumps. You might not have any problem with them?
The gear driven pumps can only use the fuel the low pressure in-tank pump can supply. As it is electric driven you can see how battery and/or voltage problems could effect it.
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😳😳

 

Thanks for the context and picture! Just picked up a new primary battery and going to try that. The secondary needs replaced and I have a new AUX12 for that but waiting on the post adapter connectors to show up from eBay this weekend.

 

New battery resulted in no change. Vehicle is not showing any codes at all either…

1 - at start up the engine revs to 3500-4000rpm and held there for around 3-4min and then dropped to normal idle.

2 - after dropping back to idle it has black smoke coming out of the exhaust still.

Still concerned why it’s free revving so high until it’s warmed up and still not getting the proper fuel (too much).

Does anyone know what normal idle rail pressure should be? I still see some fluctuations in both engine rpm (50-75) and rail pressure (200-300kpa).

 

I don’t want to try to drive it again in this condition and have to get towed back home again lol.

Here are a few thoughts at least on the excessive fuel side of things. I think low rail pressure could result in an increase in ECM commanded injector duration if the computer is looking for a specific return value. Not sure if it works this way or not but might be a thing. I haven’t tried to tune one of these ECMs so not sure how it commands injector duration vs pressure on the map.