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lexpert
lexpert, Lexus Master tech
Category: Lexus
Satisfied Customers: 2100
Experience:  Master Certified with lexus, 8 years experience with Lexus
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Amedee
, I have a 1998 Lexus LS400 check engine light

Customer Question

Customer: Hey Amedee
JA: Thanks. Can you give me any more details about your issue?
Customer: My name is***** have a 1998 Lexus LS400 check engine light on but no codes avaiable car will not start diconnected battery trying to reset sytem but no help
JA: OK got it. Last thing — JustAnswer charges a fee (generally around $18) to post your type of question to Lexus Experts (you only pay if satisfied). There are a couple customers ahead of you. We can help you for less if you're not in a rush. Are you willing to wait a bit?
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Submitted: 1 year ago.
Category: Lexus
Expert:  Amedee replied 1 year ago.

Hello and welcome! Thank you for requesting me! Does the engine crank over and not start or does it not crank over at all?

Customer: replied 1 year ago.
It cranks with no problem
Expert:  Amedee replied 1 year ago.

Thank you for that information. Have you checked for spark when cranking?

Customer: replied 1 year ago.
When this first happened the car left me stranded. Car was hesitating like it was out of gas (had half tank) then just shut off. Went back next day car started when it warmed up it shut off again and would not restart. I had it towed home.
Expert:  Amedee replied 1 year ago.

Ok, you need to check for spark when cranking. That is your next step.

Customer: replied 1 year ago.
This thing has eight coils I doubt they are all bad
Expert:  Amedee replied 1 year ago.

Me too

Customer: replied 1 year ago.
Okay will check tomorrow when I have help by myself now. Will we be able to resume this conversation then Amedee?
Expert:  Amedee replied 1 year ago.

YES. If the engine has spark, then see if it will run on starting fluid spraying it into the intake. That would be the next step after that.

Expert:  Amedee replied 1 year ago.

I will be on line tomorrow.

Customer: replied 1 year ago.
Okay thank you Amedee
Expert:  Amedee replied 1 year ago.

You bet

Customer: replied 1 year ago.
Hey Amedee have an update for you took off engine cover checked for fire ok,checked for any loose wires and connectors ok. I also cleaned the gas cap bingo car started right up then ran a few minutes cut off again light back on removed gas cap again gave it a couple of taps car started and is still running. So going to purchase a new gas cap hope its that simple.
Expert:  Amedee replied 1 year ago.

OK, let me know.

Customer: replied 1 year ago.
Hey Amedee put new gas cap on car ran for about 15-20 minutes then cut off like its out of gas plus engine light came on but no codes, plus there was a strange rumbling noise coming from under car then it would stop, then start again then stop, and start again.
Expert:  Amedee replied 1 year ago.

Ok does the engine have spark when it does not start? If so, does it run on starting fluid?

Customer: replied 1 year ago.
it does
Expert:  Amedee replied 1 year ago.

YES to which question?

Customer: replied 1 year ago.
Both
Expert:  Amedee replied 1 year ago.

Ok, good. So do we know what the fuel pressure is at when this happens?

Customer: replied 1 year ago.
No I do not have a gauge for that
Expert:  Amedee replied 1 year ago.

Ok, then how do you plan on diagnosing this?

Customer: replied 1 year ago.
Guess I will have to purchase one will let you know thanks
Expert:  Amedee replied 1 year ago.

You can purchase one, rent or even borrow one. I will be looking forward to your reply.

Customer: replied 1 year ago.
Okay thank you will let you know
Expert:  Amedee replied 1 year ago.

Sounds good.

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