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XJ Ask the Question Thread
Senior Member
Joined: Nov 2013
Posts: 773
Likes: 1
From: Lapeer, Murder Mitten
Year: 2000
Model: Cherokee
Engine: 4.0 I6
After a quick inspection it turns out my jeep has the newer fuel delivery system. I have yet to pull out the fuel pump as it is currently -20F outside, but depending on the condition of that I may go for the swap of tank and pump. Thanks for the extremely helpful posts!
While I am thinking of it, occasionally the jeep won't start, and the starter needs to be tapped on once or twice for it to turn over. I'm planning on replacing the starter, but I may as well check to see if anyone here has any ideas on a short (or long) term repair.
While I am thinking of it, occasionally the jeep won't start, and the starter needs to be tapped on once or twice for it to turn over. I'm planning on replacing the starter, but I may as well check to see if anyone here has any ideas on a short (or long) term repair.
Seasoned Member


Joined: Oct 2012
Posts: 328
Likes: 5
From: Dominican Republic
Year: 1990
Model: Cherokee
Engine: inline 6
No need to start a new thread for this I think.
My 90 XJ has about 150K miles. Runs fine, doesn't leak or burn oil.
Do I switch over to Synthetic,or leave it alone?
My 90 XJ has about 150K miles. Runs fine, doesn't leak or burn oil.
Do I switch over to Synthetic,or leave it alone?
Senior Member
Joined: Jan 2015
Posts: 641
Likes: 1
From: Anderson, SC
Year: 1999
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Jan 2015
Posts: 1,381
Likes: 3
From: Southern Maryland
Year: 1991
Model: Cherokee
Engine: 1999 4.0L
After a quick inspection it turns out my jeep has the newer fuel delivery system. I have yet to pull out the fuel pump as it is currently -20F outside, but depending on the condition of that I may go for the swap of tank and pump. Thanks for the extremely helpful posts!
Here are your general options:
If you stay with your 96 assembly, you will need to get a replacement metal tank, they are about $100 on rockauto for a good one (I bought a Spectra Premium several years ago and have been very pleased with it). As you said you will need to inspect your assembly and decide what to do from there. Its hard to find parts for the 96 fuel system because its a one-off production. If you stay with the stock setup, you will want to buy spare hangars and whatnot from part-outs, so that you have them.
As was also discussed, you can switch to 97-up but you would need to buy a sender/pump/filter/regulator assembly in addition to the plastic tank. I'm not aware of any aftermarket plastic tanks so you are looking at dealer or used. There are aftermarket assemblies and some parts but generally this is the most expensive because everything is on the assembly and sometimes you have to replace the whole thing to replace one component. Also the sender is not the same, so the gauge readings are going to be off, but I don't know how much.
Another option is to go to a modified 95 design with the metal tank and an assembly with two fuel lines. In particular the 99-up Grand Cherokee (WJ) went to an external fuel filter with the regulator inside the filter. So what you could do is get a metal tank, a 95 assembly, pump to the WJ filter/regulator, and then a local return line from the regulator back to the tank. This would give you serviceable aftermarket components and should keep your electronics working correctly but I can't promise (I haven't done it).
Last edited by ehall; Feb 23, 2015 at 10:56 AM.
Seasoned Member
Joined: Dec 2013
Posts: 473
Likes: 0
From: SATX
Year: 1999
Model: Cherokee
Engine: 4.0 I6
CF Veteran
Joined: Jan 2012
Posts: 8,272
Likes: 1
From: Baltimore, MD
Year: 1999
Model: Cherokee
Engine: 4.0 I6 HO
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
CF Veteran
Joined: Oct 2009
Posts: 2,867
Likes: 16
From: Fauquier County, Virginia
Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
CF Veteran
Joined: Oct 2009
Posts: 2,867
Likes: 16
From: Fauquier County, Virginia
Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO





