01 fuel rail damper

guero_gordo

I have not Confirmed, or I used a BAD email Addy
Location
CA
I put my son’s rebuilt XJ motor back together and had a severe fuel leak from the mystery component in the middle of the fuel rail directly onto the hot exhaust manifold and catalysts
Alldata shows a fuel damper on the diagrams, but no part number or description of the component
Pulled that thing off and it showed "04591520AA DAMPER 3190 GJ”, made of pure billet unobtanium
I tried to replace the o-ring, but no joy. In hindsight, this was likely because the original had been distorted so I spec’d the size incorrectly,
Same failure scenarion, BUT this time I knew to pressurize the rail without cranking, so cold cats and manifold
More web searching and I stumbled across one for a Mazda rotary, then searched Summit for fuel dampers and found a dead match, down to the weird green colored ring under the seal:
Standard Motor Products FPD83, got one from O’Reilly for ~$60
I’s a DBO match visually, will report back if the thing holds pressure
Worst case, I now own a $60 o-ring(.116 thicknes ICYGAS)
 
My 2000 started leaking many years ago. I couldn't find a replacement, so I installed a fuel rail out of a 1998 donor XJ with no dampener. Runs like normal.
 
My 2000 started leaking many years ago. I couldn't find a replacement, so I installed a fuel rail out of a 1998 donor XJ with no dampener. Runs like normal.
Yeah, not really sure what problem it was supposed to solve, it’s all lore and legend now: fuel pump noise, injector wear, hemhorroids…. Jeep essentially pretends it never existed
In any case, the Standard Motor part I listed above fit perfectly and it’s holding fuel pressure and I was able to move on to priming the oil system
 
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