OnMy2jz

If anyone can help me with this it will very appreciated, somehow my care is Miss firing, I replaced the space plugs, wires and did an oil change just in case it was that. That care is still running the same, it starts up ok but when I rev it does not go pass 4RPM. When I drive it doesn’t go pass 80mph and it has a slow pick up, it also takes long to shift but it doesn’t seem like a transmission problem. Does anyone have an ideal what this might be??

Please Help!

2GSKaizen

iTrader: (1)

I think you might have some clogged catalytic converters. What year GS is it? If it's 1996 or newer, I'd go get it scanned for free somewhere and see if they can pull any codes.

Titten

How does it idle? Does it shake or is it missing? Is it running rich? How old are yer O2 sensors?

OnMy2jz

I belive your right, I had it checked last night & they told me that its my catalytic. I guess this means im going stright pipe.... YEA!!! LoL!!
As soon as I remove it I will let youknow if that was the problem or not. I also got it scan last night and got like 6 codes (not good) but it seemed like my O2 sensers need to be chnage as well.

Thanks for the advise, I will keep you updated.

OnMy2jz

After I changed the spak & wires it was idleing at 2RPM's. sometimes when I start it it shakes. What do you mean if its running Rich??
I bought the 2 top ones Bank 1 & Bank 2 anout 2 years ago Denso but never changes the lower one.

Thank you Mate!

RyanV9

Running rich means it's throwing too much fuel in the cylinders. Bad O2 sensors could be a cause of this.

To me it seems like too often people like to claim the catalytic converter has failed. Usually it's emission related when it happens, but anyway, I had a similar issue with a BMW before and the problem was actually the O2 sensor. The car would idle ok, and run ok under light throttle, but if I tried putting my foot down it would run like crap.

Titten

This X1000000

OnMy2jz

I believe that might be the problem as well, I’m going thru gas like if its evaporating... I might have to change them even tho I have only had the tow top ones for about a year and a half. Would you recommend I change all 3??
Thanks for the info and for answering my question.

PIONEER

iTrader: (2)

if you have a clogged cat, after you drive the car at night, it might be glowing red from heat. you can go to autozone, have them run a OBD test on the car. it will tell you if the O2 sensor is within range or needs to be replaced.