Lexus Troubleshooting Questions? Ask a Lexus Expert
Was all the work listed to correct the no start and no check engine light situation?
I am going to defer on this one Have not heard of this problem.
You stated that the check engine light does not illuminate correct?
Any issues with fuses blowing?
Do you have an aftermarket alarm on this car?
As far as I have checked, no fuses are blown. The car alarm is from the manufacture, not aftermarket.
As for the check engine light, it does illuminate once a while, but not all the time. Most of the time, it doesn't illuminate when you turn the key to the ignition on.
Everytime the engine light is on, the engine starts easily. Only when it's not on when the ignition is on that is when the engine won't fire, just cranks.
Ok, that is what i figured you would have but I wanted to be sure.
have you done any electrical tests on the car yet?
Thanks, XXXXX XXXXX think it's the Engine ECU. Is there a way to test the Engine ECU to know it's still active/alive or not?
I have a high idle with me 92 Lexus Sc400. What could be the problems?
Even after warming up?
Any signs of vaccum leaks?
If I force the TPS all the way down (counter-Clockwise) then it idle around 800-850 RPM & get CEL code 13 RPM signal. Also, when in Drive/Reverse it goes to 650-700 RPM with a bit rough idle at stop lights/signs.
If I reset the ECU, and leave the TPS back to normal position w/ idle at 1025 RPM, then there is no CEL at all. No rough idle at this normal setting.
I just replaced all of the vacuum tubings but it didn't help.
What about the setting without the CEL # XXXXX at idle 1025 RPM? I'm not sure which route to take at this moment.
Thanks, I'll try that tomorrow. Will keep you updated.
Once again, you are dead on the problem. It was off-timing as you said it was. The timing was off by two teeth. I fixed it and the car runs smoothly once again. No more rough idle and CEL #13. Thank you once again for your expertise.