hay im looking for some help with my 91 4runner 4x4 3vz 3.slow, hears whats wrong it seams to realy idols ruff only when im in gear and if im at a stop light idoling it will bog out and die,but if im in park or nutral it will idol just fine, the last fix i did on my 4runner was new plugs and new cap with rotor please help.................... also i know the 3vz dosent brake eny speed bariors but it feels way under powerd when i ecelerate.

 

I would start by checking your timing...did it happen right after you changed you cap and rotor or just slowly get worse?

 

slowly got worse

 

id also make sure those new wires clamped onto the sparks well. they kinda click when they do. when i changed mine i had to physically push the new wire terminal further into the big rubber insulator that plugs onto the plug...that way I could for sure feel them click on well and then pushed the rubber insulator back down on the plug.

 

if it were the wires why would it only idol ruff when im in gear?

 

200 to 100 when in drive 800 when in N or P

 

"but if im in park or nutral it will idol just fine" somehow i didnt see this the first time this points to other things. It would seem clutch related and I do not have a auto so I probably wont be much help.

however...if it idled better with just a little bit of gas peddle, i might start to suspect fuel filter starting to clog.

 

torque converter?

 

ya i have an auto ,wich has given me a bit of truble a few months ago but not latly

 

yeah cause when you put it in gear the torque converter actually puts some pull on the engine even without depressing the gas...so if the gas was a little restricted (and usually slowly gets worse in the filter) I could imagine how maybe a restricted filter might not allow it to get enough gas to pull the vehicle in gear.

I dont know...just bouncing ideas around.

 

fuel filter,u mean to tell me im wasting all my money on 91oct gas

 

what about the injectors? could they be durty?

 

any one?

 

we should all be replacing our filters if we havnt anyways so you could try it for 15$ and at least you would be doing something you should anyways even if it doesnt do anything.