Missing going uphill

[Robert H]

95 Grand Cherokee 4x4 I6 208,000 Takes gas ok under slow accelaration, but when going uphill or heavy accelaration its starts missing

 

[99jeepxj4.0]

95 Grand Cherokee 4x4 I6 208,000 Takes gas ok under slow accelaration, but when going uphill or heavy accelaration its starts missing

i had the same problem in my 99 xj i checked the sparkpugs and one of the was pretty bad off i replaced all sparkplugs and she runs great now

 

[SteelHeadz]

Check your fuel pressure at idle and WOT. Also, if possible to duplicate this issue when the fuel test gauge is installed and get the reading when it sputters and misfire.