Okay i have a 1999 ford ranger with a misfire/noggin the motor out first I have took it to different mechanic who thought gas we changed gas and fuel pump sock as well as fuel filter the gas was nasty but after done it didn't help we then changed spark plugs and wires crankshaft sensor and all 6 fuel injectors nothing has seemed to help fix the problem yet people say it could be simple the truck will set and run just fine like it always have you can get the rpms up as much as you want to in park and netrul but the minute you put it under a load of any kind the motor will bug out and sounds like a misfire but we have changed everthing you can barley hit the gas and get going and actually drive it but if you mash the gas it will sputter like or bog out very set of to me looking for any ideas of what it may be have jacked it up and put it in drive not under a load and can give it plenty of gas and it gos but if I put my foot on the break and give it gas the motor sputter me or bogs out please if you have any ideal please throw me something thank you in advance! A