BACKFIRE

YEP!!! A/C-Heater fan.

Zip Ties, Papper Clips, and Duck Tape will save the world one day. :P

Thank you E.U.B.T.. I totaley forgot about the idle valve. I checked it and the plug was off!!!! The little clip that holds the plug on is broke. I put a zip tie to hold it on and IT RUNS NOW!!!!!! Thank god the valve was not bad. A new one cost $900 I

I let it sit for a week with the battery off and it still does the same thing. I,m about to take it to the dealer and droop some big money on it. I hate to but it looks like need to.

2 mounths i bought a 90 LS400. Ran grate but neaded a water pump. I replacer the water pump, front brake pads and roters, thermostat, and change oil. I`v been working in it slowley when i get free time. After geting every thing done the car i started it and it will run fine for about 3-5 min but after that it revs up and down at idel and the Check Engine light came on. I got a code 31 (air flow sensor). So i ordered a used sensor, insteled it and does the same thing. So then i went to O`Rielly`s and got a new sensor and still wont run. So i went down the street from me to a friend that has a 1991 LS400 and tryed my original flow sensor on his car and it runs fine as does the other sensors i got. So my question is what els could be rong with my car???? I keep geting a code 31 (air flow sensor). Could it be a ECM problem???????

I have Hydroedge tires on my moms 1989 volvo 740 turbo. They are vary good tires. They have about 30,000 miles on them and look good to last a nouther 10,000. :D I would go for them if you have the money. There well worth it. I am going to puting a set on my 1990 LS-400 as soon as my MXV4`s are worn. ;)

Has you car been changeed to R-134A or is it still R-12.

I found out how to get te codes with out a scaner. http://www.lexls.com/tutorials/intro/codereading.html I hope this helps someone. It did for me. I got a code 31. Mass airflow signal. Will water hurt the sensor? It got rained on when i had it off.

WTF!!!! A little to much info there. Someboudy clicked something rong.......

First let me say hellow. Im a first time Lexus owner. I have 1990 LS 400. 225,457 miles. :) Runs lote a top, Or at least it did. :( I bought the car about 2 weekis ago at auction for $1,400 abd drove it home. Seeing that it has a few miles i thought i would do some work on it. I did the front brakes, New rad, coolent hoses, drive belt, timeing belt, water pump, and tune up. I got every thing done and started the car and it ran fine for about 2 MIN. I shut the car off, put the tires back on and lowered it off the jack stands. I re-started the car and it seamed to rev up a bit. Then remembered to glug in the sensor on the bottom of the rad. I pluged it in and ite idle droped down and sounded good. After about 5 MIN the engine started surging up to 1800 RPM and the exaust is geting vary hot. I checked every thing and i dont see eney thing rong. I realey love this car. Eney help would be grate. Thanks. Backfire Rabbit. :P