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Here's a problem that my 94 LS400 recently developed. When cruising down the highway holding the throttle steady at speeds between 50-60 mph, and RPM at around 1800-2000, sometimes the throttle will cut off, as if I let go of the gas. RPMs go down to idle level, around 650, and the car keeps...

So this topic has been debated to death, but yet again I'm opening another thread. I'm looking for everyones suggestion on what type of oil to use. I've been using Mobil1 full synthetic in my 01 GS430 and there's not a single leak anywhere, the car now has about 115k on the clock. However...

Whats up guys, this problem just started yesterday. When I start the car, idle stays low, pretty much at 650rpm - which is the normal speed for when the engine is warm. It of course makes for a rather rough/vibrating idle until the car warms up. When it warms up, the car is perfectly normal...

I always wondered, what does it do? Its a pretty big complicated looking unit. I believe it has something to do with emissions, but what? And then California models have two air pumps?

In the recent couple of weeks my 01 GS430 developed a problem starting up. I need to crank it for a long time before it finally fires up, and sometimes it will only fire up on the second try. After it starts, it seems to lag a before reaching around 2500 RPMs, and then takes off hard. Also...

I need to replace the rear original shocks on my 94 LS400, and dealer is looking for $130 per shock. I looked on aftermarket, and the only other ones I could find were Tokiko and KYB, and they run about $80 each. I would ideally prefer Bilstein or Koni, but they dont seem to be available for...

I want to replace the stock subwoofer in my 94 LS400, without replacing the amp or anything else. I understand it is a 2ohm 40 watt 8" woofer, and it is difficult to find anything with the same ratings. The closest I could find on crutchfield is a Kicker with dual 4ohm coils (i understand if...

I need to run wires directly from the battery to the passenger side in my 94 LS400. I need that for the 120AC converter to run my laptop. I'm planning to mount it on the passenger side footwell panel, but I have no idea how to get the wires into the cabin. Of course I will use a fuse as well, I...

Guy, I will try to make this one as short as possible, so bare with me. If anyone remembers my old posts, you will know that I own a 1994 LS400 since 2006, and all this time it's been awfuly low on power. It takes off like a 3 cylinder Geo Metro, pings around 2500-3000rpms, and sounds trashy...

Swapped LS430 seats into my car.

I know its a long shot... I've downloaded the entire manual from toyotas tech site, it has a bunch of diagrams but nothing on the seats.

Sorry if its a completely retarded question, but is it possible for fuel management? I believe the only difference in fuel management between the two cars are MAF sensors - everything else should be the same? So if I were to swap out MAF and ECU, would that work? Do both engines use the same...

I have a 94 LS400 and I recently got an APEXi SAFC Neo piggyback unit, which I'm going to try and install sometime during this week. I'm gonna have a lot of questions as I proceed, especially once its installed and I'm tuning it, but here are a few of my first questions. 1) The SAFC unit...

Guy, I just started doing my tune up, my car has a little more than 100K on it. I started by removing the throttle body - and the intake chamber behind the throttle body is perfectly clean with not even a sign of carbon build up anywhere on it, but there's a very very thin coat of oil on the...

Hey, I have a friend who is willing to lend me his Snap-on scanner, but he only works on GM's, so he says I'm going to need a card and adapter for Toyota/Lexus. Where do I find such card? I found the adapter on ebay. This is for a 1UZ OBD1 engine.

This is the warning I get.... The warning is explained here.... And if I chose to ignore the warning....

I am so frustrated I'm ready to drive this car off a cliff. Ever since I've replaced the water pump, The car wont reach the normal operating temperature. The temperature stays just a notch about the first line. I though my thermostat might have been deffective, so I just replaced it, and still...

Hey guys. Last year my car started overheating, which turned out to be a bad water pump, which I since replaced. But before I replaced the water pump, I first replaced the thermostat. I removed the plastic piece that connects the thermostat housing to the radiator hose, installed new...

Can someone confirm whether it's normal or not for the ECU not to throw a CEL right after the primary O2 sensors are disconnected? My ECU throws the CEL about half hour after the O2s are disconnected. The car is a 1994 LS400, first gen, OBDI

So I've been battling the pinging and poor performance issue for a while on my first gen LS400. I've done a number of things to try and resolve this issue, replacing numerous parts, all to no avail. One of the things that I've replaced recently is the MAF sensor, and it still did not resolve the...