i havea 2000 4rnr limiited, under initial acceleration it seems to misfire, it almost sounds like it spits and sputters and then catches and goes just fine, yesterday got the codes ran at autozone, changed the O2 sensor at the converter, and also changed the throttle posiston sensor, that didnt do the trick, so i also changed the fuel filter, but still did the same thing this morning, any suggestions or help would be greatly appreciated, thanks

 

When did it start having the problem?

I take it you changed the plugs and wires already?

Also how many miles do you have?

 

i have right at 154k miles, had the timing chain changed at 130k, started having the problem about two weeks ago, after changing those things yesterday, it seems to have gotten worse, and no haven't changed the wires and plugs, guess i better, could it be the maf??

 

There are SOOOOOOO many things it could be. The best idea it start cheap and work your way up. Injectors could be dirty too, plugs, wires, cap, gas cap, fuel pump, maf (dont think so though), thats all I can think of for the moment.

 

changed plugs and wires yesterday, didn't fix the problem, although they needed changing, this thing is driving me crazy

 

How about some SeaFoam to clean out your injectors? Only about $7/bottle, they sell it at Napa.

 

gave up on fixing it myself and took it to the dealership, it ended up being the mass air flow sensor, it is running like a top now!! thanks for all your help