Fuel pump issue

[rjinaz86323]

My Jeep has always been slow to start (seldom on first crank). Luckily it has a Schrader valve, so I got a loaner gauge from Autozone and tested it. I only had 39 # of pressure and the gauge immediately drops to zero when I shut it off. So I guess it is time for a new pump. Do I need the whole assembly or just the pump itself?

Thx
Rick

 

[rjinaz86323]

is this what I would want?

Delphi FG1221 Fuel Module​

 

[Chris]

I would replace the entire fuel pump assembly myself.

This is the correct Delphi unit:

https://www.amazon.com/dp/B00MBI0YGY/?tag=wranglerorg-20

Same part number as the one you posted.

 

[KingCarGuyZ]

Seems like you already diagnosed it, but you might want to try priming it a few times (like glow plugs on a diesel ) before starting, see if that makes it kick the first time. then I would suspect either the pump or a leak, but I would try the pump first.

 

[rjinaz86323]

Since the pressure is below spec and it does not hold pressure dont think I want a work-around. Time for a new pump

 

[TrueTexas]

I used the Delphi pump to replace a failed pump in one of my TJs about 15 months ago. Starts the first time, every time.

Just an observation, the one that came out was an Airtex. Previous owner said he had the original replaced 2 years before. So the Airtex only lasted 2 years. Stick with Delfi. Now that the Bosch fuel pump assembly is no longer available, the Delfi is pretty much the best complete pump you can buy

 

[rjinaz86323]

The one that is failing is the Delphi unit. Don’t know how long it lasted as It was in the TJ when I bought it