93 ls400 jerks
#31
Well, actually I did not say that. But, the ECU is not where I would start the diagnosis on the issue. Let the Dealer do all he's going to do! You get new parts in the tune up area which are not cheap. I will warn you to not put aftermarket wires, caps, rotors or plugs in it. Do it once and do it with Denso....
They will pull their hair out by Friday evening. My guess is they wont have a clue! If they cant figure it out I will try to help you. I have an idea what it is and it will require some hands on to fix, a few parts from a Lexus Dealer and a bit of time!
They will pull their hair out by Friday evening. My guess is they wont have a clue! If they cant figure it out I will try to help you. I have an idea what it is and it will require some hands on to fix, a few parts from a Lexus Dealer and a bit of time!
#32
Actually, i have a buyer coming tomorrow to look at the LS. I found a 2002 GS Sportdesign for my lady to drive. She likes it better because its smaller. And its also a great car. Sure hate giving up the LS though. its been a great car. And the mechanical issues have been fun. I have learned a lot about the differences between Lexus and Ford and they are not so far apart in a lot of ways. Except durability. I don't think Ford can match Lexus on that. now that you have seen her from the inside, take a look at the outside.
The black, 450k 91 in my picture here has the 06 GS430, non chrome wheel. I like that it is updated but didn't want the chromie/flashy thing going on. In my opinion the chrome on black and all you see is wheels. But that white one would look great!
Oddly enough my daily driver is a 2000 F250 7.3l and don't ask me to give it up!
Last edited by LEXTEK1; 09-20-11 at 06:53 PM.
#33
mmm F250 sweet.
sorry to hyjack the thread a little but seems you got her fixed and are now selling her.
heh anyway. hey Tek im really thinking its the motor mount bushings now. it just runs to smooth..... ? rpms dont jump when its doing the jerking between 40 - 50mph cruising. oh and i cant control what they put on her for parts i will ask for all the old ones though incase they do rip them out..... now your kinda scaring me. LOL
sorry to hyjack the thread a little but seems you got her fixed and are now selling her.
heh anyway. hey Tek im really thinking its the motor mount bushings now. it just runs to smooth..... ? rpms dont jump when its doing the jerking between 40 - 50mph cruising. oh and i cant control what they put on her for parts i will ask for all the old ones though incase they do rip them out..... now your kinda scaring me. LOL
Last edited by SkulCracka; 09-20-11 at 08:08 PM.
#37
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03 f250 6.0L. 17 MPG loaded in town, pulling a trailer. I'm not surrendering that one either. Your cool Skul, I'm done with this thread. I agree on the wheels. If I could only keep her.
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Can anyone give me the exact values for the caps? My ls is the car with ac and I would like to drive her to get the new caps, my land cruiser has no ac and its 20 minutes to the Fry's through 105+ degree heat. Thanks
MLM
MLM
#40
Pole Position
Ya don't like the heat, get out of the fire.
#42
Pole Position
But anyway, let us know how it works out after ya get the caps and put them in.
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Well, looked at the innards of the ecu, 94 is totally different, had about a dozen caps that look ready to go but they are so small and so tightly soldered to the board that I think maybe i'll see if I can find a replacement ecu from a junkyard. Weather finally broke and I am back in the landcruiser anyway. This car has been the most frustrating peice of ---- I have owned. Mechanically it's great, electrically, its a nightmare.
Everyone needs to have an ex who refused to work........it builds character. (just in case it does nt show, this is offered up with sarcasm. Really wouldnt wish lazy ex syndrome on anyone.........)
Everyone needs to have an ex who refused to work........it builds character. (just in case it does nt show, this is offered up with sarcasm. Really wouldnt wish lazy ex syndrome on anyone.........)
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ok now this is strange. my LS idles perfect. It accels smooth. at mid rpm, possibly around 2500 rpm, not sure cuz the tach is broken, it cuts out like the spark just shut down, then comes back causing a tremendous surge. prior to the occurrence the engine was running normally and my woman was driving it daily with no concerns. since it started acting up, i have replaced the following.
Fuel Pump- wife said car runs like fuel pump is going out so to shut...er I mean to satisfy her diagnosis, I installed a new one.
tp sensor- code 41 - car runs better, still jerks.
water pump- actually found broken bolt in pump causing coolant loss
thermostat- just seemed like a good idea at the time
cam sensors- code 13, since water pump. I installed used sensors and harness but car runs better, problem still there.
cleaned grounds on left and right fenders- no affect
cleaned maf- runs worse, $160.00 at junkyard, car runs better still. problem still there.
Cams are in sync with crank and each other. coolant is full.
put 4 gallons of gas in yesterday.
any help would be greatly appreciated.
Fuel Pump- wife said car runs like fuel pump is going out so to shut...er I mean to satisfy her diagnosis, I installed a new one.
tp sensor- code 41 - car runs better, still jerks.
water pump- actually found broken bolt in pump causing coolant loss
thermostat- just seemed like a good idea at the time
cam sensors- code 13, since water pump. I installed used sensors and harness but car runs better, problem still there.
cleaned grounds on left and right fenders- no affect
cleaned maf- runs worse, $160.00 at junkyard, car runs better still. problem still there.
Cams are in sync with crank and each other. coolant is full.
put 4 gallons of gas in yesterday.
any help would be greatly appreciated.
Been reading the Forums for years trying to figure out the problem. Every time I did something it got partially better then reverted. changed plugs & wires, changed fuel filter, changed fuel pump relay resistor. For some reason it would have much more power when I bypassed the fuel relay resistor.
a few days ago I came across a Forum article on how the Computer capacitors were junk in the 89-97 toyota's and often would leak and damage the control board.
So I ordered the Capacitors for mine (really cheap, like $5 for 10 of them). took about an hour to remove the old ones and solder in the new ones (I am a fair solderer not a good one). Put it in the car and 2 of them popped (I did not know there was a positive and negative terminal, so I think I put them in backwards) Luckily I had ordered some extras (because I have a spare computer, ECU, for the car and figured I would do it as well. Anyway, after replacing the 2 that popped (in the same direction as the 7 that did not pop) I put the ECU back in and the car is finally running like it used to. And the traction light is no longer on.
If you do a search for LS400 ECU repair, you will find the exact instructions and the list of the capacitors for every year and model.
Hope this helps: Bob
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