Lexus Troubleshooting Questions? Ask a Lexus Expert
YOu stated you checked the timing belt is in place, the very first check I would make here is to be sure the timing belt is in proper position!!!! THis belt needs to be replaced every 90,000 miles. If the belt jumps time then you have big problems:
1- The engine compares the crankshaft and camshaft position sensor readings to determine fuel and spark delivery. If the timing is not right then the car runs very poorly or not at all
2- This is an INTERFERENCE vvt-i motor, if the timing goes out then you have a very good chance of valve damage, I have had to pull too many of these cylinder heads. Not a fun or cheap job
Check the timing belt position first. I can upload a few check sheets and diagrams for you once you verify the timing.
The igniter is built into the coils on this car but we can tackle that next. You basically have 3 coils that fire 2 cylinders each.
Thank you, XXXXX XXXXX need to inspect the position of the timing belt, this is the MOST likely cause if the car ran fine until you restarted it. Look at this picture below:
Take a 22mm wrench and rotate the lower pulley (crankshaft) until the white XXXXX XXXXXnes up with "0". The marks on the upper camshaft pullies should line up perfectly with the refrence marks on the backing plate at 12:00 positon, if they are not in sight you may need to rotate the crankshaft 1 more revolution, the cams rotate 1 time for every 2 crank rotations.
Let me know what you find, I have a feeling you will find a timing belt issue.
If not then right click the link below I posted the next check sheet to:
I will be logging off for the evening soon, if you need more help simply reply, if this is what you need from me for now then remember to hit "accept" before you log out. Thank you.
Checking that part of the circuit requires an expensive tool known as a oscilloscope, click below for more information, basically the ECM sends an IGT signal (tells to fire) to the igniter, coils fire and send back an IGF signal to the igniter/ecm, if IGF acts up then spark shuts doen but you should have a P1300 code stored. Heres the file:
I just had another thought here also.....this car has an immobilizer system, there is a red security light on the dash, be sure that the light goes out when you insert the key.
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