Dtwillis5

94 ls400 I did the steps for diagnosing the check engine light but I can't get the check engine light to give out codes. What could be the problem have anyone had this problem before.

86lumbee

Make sure that u r jumping the terminals e1 and te1 under the hood and turn the ignition switch on if this does not work make sure that the bulb isnt burnt out

deanshark

Is the light working at all, does it come on when you turn the key before starting the car? If not, either the bulb is burnt out or someone has covered it with tape. This, http://www.lexls.com/tutorials/intro/codereading.html , is the correct way to diagnose. If there's no codes stored it should continually blink every .25 second.

Dtwillis5

Im jumping the right terminals I have the repair manual. It blank fast .25 sec once before but something wrong with the car because it kill when I press the gas at 1700 rpm

86lumbee

sounds like you have either an airflow problem or a possible bad coil. but first thing is first you need to make sure that your check engine light comes on when you turn the ignition on and if not you need to make sure it isnt covered.

Dtwillis5

The car been sitting for 2 years. imma clean the throttle body and do a full tune up this weekend. Good looking out imma let u know how it went

deanshark

Maybe it's just not reading a code, it happens. Does the RPM go higher if you give it light gas? Check your AFM to see if it's in spec, mine isn't and it doesn't throw a code unless I unplug it. You have the manual, it will tell you all the specs. When you do the tune up you should also change the ECT. https://www.clublexus.com/forums/ls4...read-this.html it will help ya out with the fuel.