sc4lover

Tryed all of those..

hovsc400

im in the same boat as you guys i have read hours on top of hours to see wht is causing this issue it seems many people have this problem and its not even in the common issues list,,,but i to have not found a solution planning to mess with the tps keep the update rolling guys

AerialAce

Its crazy how old these things are and how common the problem is, yet no one has figured out this issues that supposedly so common its bound to happen =(.

I really hope someone gets to the bottom of this so we can get back to enjoying our cars.

1JZPWRD

iTrader: (59)

Mine started a little hesistation around 4k - 6k a few days ago, but nothing at idle. I wonder if its the same issue or problem that no one seems to know about how to fix?

sc4lover

Have any body changed there fuel pump

AerialAce

Never heard to anyone changing that, most likely because of where its located. I doubt its that though, my exhaust sometimes smells like its burning more fuel not restricting it.

Meanshyguy

iTrader: (11)

My guess is o2 sensors

BobbyB

Anyone every solve this problem...was it fuel filter or something else..?

AerialAce

Changing the cats (which where about 40-60% clogged) and the front 02 senors decrease the hesitation significantly, but its still there just not as noticeable.

Seems to happen when the car is cold, if I let my car warm up for about 10 minutes it runs perfect. I also found this thread, here. Going to get the rest of my 02's done, change the MAF, wires (spark plugs) and fuel filter when I change my oil soon. If all else fails I'll try the ECU, but I dough its that.

MuGGzyx

Just wanted to add to the thread so if someone else has this issue and does a search they might have better odds than some of us have had.

93 SC400
I did most of the stuff listed in this thread...
https://www.clublexus.com/forums/sc-...on-issues.html

Fresh plugs and cables, pulled them to make sure none were fouled, all were dry
New fuel filter
Unplugged the MAF and issue didn't change, didn't have a meter so I couldn't do that part but no change between MAF connected and MAF unplugged.

Jumpered the fuel ECU, could hear fuel pump whirring away so it's good, no change.
Bought a new coil, tried driving it with new coil in each spot, no change

Replaced Engine Coolant Temp sensor

Cleaned AICV

Adjusted TPS with Meter

Replaced Caps/Rotors

No vacuum leaks

All I can even think of at this point is the "Brain" that controls all of this other stuff.

themisfit

i have a quick question what does itmean when my overdrive lite flashes on and off while i am driving