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If the FCA is not working properly, the ECM cannot communicate to the pump how much fuel it should be delivering. In most cases, people first know there is an issue when they have a hard start or no start issue because the FCA will not allow the pump to properly build pressure to start. However, by the time this occurs, the truck has probably been delivering less than the truly desired amount of fueling for a while already as the FCA is a simple spring design that many times takes a rather slow death, and not an immediate failure.
If you're experiencing hard start or no start issues, one easy way to confirm whether or not the FCA is causing the issue is to simply unplug it, thus eliminating any metering. Presuming the truck starts, immediately turn it off as you will have full pressure running to the fuel rail, but at least you have fairly high certainty that the FCA was causing the issue.
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Is this the fuel pressure regulator as well??
They are commonly referred to as the same thing yes.
I was wondering if this part had any warranty?
1 Year Warranty through Bosch.
I was wondering if this part came with the electrical connector or where I could get one?
It does not, that would be a used part only to my knowledge.
Does this part come exactly like the picture shows??
Yes the LB7 has a straight plug out of the back. LLY and up are all 90 degree.