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Start with the basics and check battery connections are clean and tight. After that, checking both fuel pressure and fuel flow is a good idea. If it has a rough idle, you can start by checking your ignition system (spark plugs, wires, as well as the distributor caps and rotors). I'll preface this with a disclaimer that it's a guess, but from your description and the short video, it sounds to me like a throttle position sensor may be reading incorrectly at times. You'd need to test your sensor and see if the signal drops out or jumps around on the output of the sensor; as you slowly press on the throttle, you should see a smooth progressive change in signal. I believe there are other posts about checking and adjusting a TPS for your model year, but I won't try and go into detail myself, as my vehicle is a completely different system to yours. -
By average_bum · Posted
Hi All, As the title says, I have a 1990 LS400 that I am parting out before it heads to scrap. I am in Idaho but can ship in the lower 48. Mechanically, as far as I can tell, there are no issues with the car. I bought it because I needed the 1UZ to fix a different car. As such, everything is there -1 engine. The interior is.. in rough shape. There are some good panels, but most leather is cracked and/or tearing. The gauge cluster has the typical sagging tachometer, but everything else works fine. The transmission is strong and smooth. I've driven with it and have videos I can email you. It never has an issue through any of the gears. No clunking or hard shifting. Let me know what you're looking for. Leave a comment here and I'll respond with pictures or PM me. I'll update this thread if/when things sell. P.S. The engine is still in the car so I can move it around but I'll pull it in April/May -
I have a 1990 ls400 220k miles and when ever i give it gas it bogs very bad usally around 3.5k rpm-4.2k rpm. sometimes it wont bog for a while but will start after driving for a while, if i rev in neutral or park it will rev perfectly to limiter im just confused on what it could be ill add a video below. i was thinking maybe fuel filter im about to do it tommrow and see but im not really sure any help is appreciated 35F72E86-C05F-455C-8495-5B08A1907B72.mov -
Alright I know it’s been a while since I spoke last here. The bushings Mika recommended to replace are both new on my car and OEM. The sway bar bushings are installed and the noise is still being made. I don’t think it’s my struts, the sounds seems to be coming almost from the center of the car in the front but more on the driver side. Last week the noise went away completely for about an hour and I couldn’t get it to make the noise (which is usually extremely easy to replicate) but now it’s back. Sometimes it’s loud and sometimes it’s very quiet. It is bothering me so bad IMG_1148.mov -
Never had better tyres for any car than Continental. Quiet and long lasting, many of them self repairing for tiny holes.
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