SuzysJ
NAXJA Forum User
- Location
- corpus christi, texas
Have done searches on this and other boards. Son's 2001 XJ (2WD) has ping at all speeds, at all rpms when anything past light throttle (not at cruise).
First gear WOT from 10 mph: yes
70 mph, go to WOT: yes
Part-throttle hill-climbing: yes
Hard-starting: must wait a few seconds after key energise.
Dieseling: yes, I think this is what he is describing to me.
MPG: only 16.5-17 combined city/highway (low in our experience with other 2001 near-identical model).
No problem with coolant system, temps are on the money; carefully flushed, with new thermostat and factory spec coolant. (ALL fluids, hoses, belts replaced in December after purchase at 67m miles). New factory-spec plugs. I pulled throttle body, cleaned, and replaced IAC and TPS.
Engine decarboned. Is using quality gas (87 or 89 octane, no difference). I have advised him to run 93 (and continue using FUEL POWER FP-60 additive)until we sort out some lines of investigation. He lives in Virginia, undergoing USMC officer training, so has little time to problem chase.
Fresh emissions inspection at purchase.
Not looking for bandaid "fixes". This vehicle will be in service with us until 2012.
Your advice requested. :compwork:
First gear WOT from 10 mph: yes
70 mph, go to WOT: yes
Part-throttle hill-climbing: yes
Hard-starting: must wait a few seconds after key energise.
Dieseling: yes, I think this is what he is describing to me.
MPG: only 16.5-17 combined city/highway (low in our experience with other 2001 near-identical model).
No problem with coolant system, temps are on the money; carefully flushed, with new thermostat and factory spec coolant. (ALL fluids, hoses, belts replaced in December after purchase at 67m miles). New factory-spec plugs. I pulled throttle body, cleaned, and replaced IAC and TPS.
Engine decarboned. Is using quality gas (87 or 89 octane, no difference). I have advised him to run 93 (and continue using FUEL POWER FP-60 additive)until we sort out some lines of investigation. He lives in Virginia, undergoing USMC officer training, so has little time to problem chase.
Fresh emissions inspection at purchase.
Not looking for bandaid "fixes". This vehicle will be in service with us until 2012.
Your advice requested. :compwork: