over40driv

My 95 SC400 has a light jerking or hesitation at light throttle, mostely around 1600 rpm, 30-40 mpg. I dont want to think it is the torque conv. kicking in and out, but when you gas it it runs like new and smooth. Am thinking about a new set of plugs and wires. Dosent seem to really matter if the car is cold or hot, maybe a little worse when cold. No CEL.

UpInTheLex

iTrader: (5)

There is another thread on this same problem that Johnsc400 and I started a while back. So far no definite answer.

Could be MAF dirty

General Tuneup, plugs, wires, caps, rotors,

Could be bad grounds from the battery and/or the motor

Could be torque converter

Could be lsight exhaust leak, faulty 02 sensor

Clogged cat converter?

Dirty Air filter?

Try searching around, lots of SC400's have the same problem. I want to talk to someone with a manual transmission conversion and see if they're having the same problems.

over40driv

Thanks for throwing that at me Upinthelex, Probably should clean my MAF wire when im installing my plug wires, I have a new center cat. conv. Seems like Toyota likes to cycle their EGR sys. a lot at low throttle settings, as compared to adding the gas.

sc400injen

read the thread that's named "hesitation", it'll explain better, but i was pullin a 13 and a 31 which is an rpm sensor code and an air sensor code, my rpm sensor wire was being rubbed by the serpentine belt, so i just wrapped and secured it and it solved my problem for like 2 or 3 weeks now so hope it helps

over40driv

Yeah, if I would have seen the other thread, I would of just jumped on that thread. My hesitation is very light, other people drive it and say they dont noyice it, guess Im a little more sensitive about it, when youve got a 98% perf. car.