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Unread 09-06-2011, 03:46 PM   #1
georged4
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1989 XJ Cherokee 
 
Join Date: Nov 2009
Location: Long Island
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Best brand fuel pump/sending unit?

So my fuel pump is definitely on its way out.. loud humming noise when on the gas and I have to give it a good prime for it to start after a few cranks. So I wanted to see where/what is the best pump to get. I think I should replace the sending unit as well.. or should I get a whole new tank? Thanks guys

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Unread 09-06-2011, 04:04 PM   #2
avbcon12
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Bosch
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00 XJ auto 4.0l
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Unread 10-02-2011, 10:14 AM   #3
georged4
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Thanks. Got it and installed it, works great, and quiet!
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Unread 10-02-2011, 06:00 PM   #4
tjwalker
It's the crank sensor!
 
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Bosch, Bosch, Bosch when it comes to fuel pumps for the XJ.

Did I mention that Bosch is the best option? With many years of experience on the 4.0, I install nothing but Bosch on the 4.0 engines.

Do NOT install an Airtex. IMHO, they have the biggest reliability issue of any of the fuel pump mfgs. Check other threads to verify this.
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Unread 10-02-2011, 09:02 PM   #5
georged4
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yeah has been working great. only thing is now I seem to be getting worse gas mileage, I am definitely running rich. How does one tune this computer with out a obd port?
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Unread 10-03-2011, 05:15 AM   #6
tjwalker
It's the crank sensor!
 
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Quote:
Originally Posted by georged4 View Post
yeah has been working great. only thing is now I seem to be getting worse gas mileage, I am definitely running rich. How does one tune this computer with out a obd port?
No tuning of this computer. And no need to. Get at least three calculated gas mileage samples before coming to any conclusions. Miles driven divided by gallons consumed. That way, you'll know. Anything less is guesswork.

If you are truly running rich (verify by exhaust analysis is a good way) the map sensor and upstream oxygen sensors are in play here........
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Unread 10-03-2011, 09:08 AM   #7
mountainjock
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Not to hijack this thread, but a quick question for walker- Made the mistake and installed the Airtex, it lasted 3 days. I can't find a sending unit assembly for my 88 I6. Napa has a carter pump, but I would need to enlarge the opening on the top cap that holds the pump in the unit, and the screen seems loose, like it may fall off with a good bump. Should I install the Carter pump? Somebody on this forum suggested rebuilding the pump. What would you suggest?
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Unread 11-21-2012, 04:03 PM   #8
jeepmannc
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1989 XJ Cherokee 
 
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I picked up a Bosch fuel pump, # 69302, but the pump in the tank was longer by about 1 inch, in my '89 Cherokee Laredo. Could not use it. The problem turned out to be the hose connected to the pump and that fixed it (slipped it back on and tightened the clamp). But, I wouldn't mind replacing it anyway seeing as I have over 211,000 miles on it.

Anyone have an idea of what pump I have? I have read that in this model year there is an interesting mix of part manufacturers.

TIA, Marc
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