I've got a 2000 grand cherokee with a 4.7 liter engine. when you
go wide open throttle around the 100 km/h mark, the vehicle will backfire and
miss fairly consistantly. At any other speeds, there is no backfiring at all, the vehicle runs smoothly. Fuel pressure is good and consistant when
this all happens. Tried a different tps, no change. Spark plugs are new and
no signs of carbon tracking was seen on any of the old ones.
the vehicle is acting like it is lacking fuel, however the
adaptives and o2 sensors are good. Cam and crank signals appear in
sync.
The problem is odd, because it only happens around the 100 km/h mark +.
Has anyone seen this problem and/or could make a suggestion. Thanks

i would suggest timing. Check that first.