How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike V. Your Own Question
Mike V.
Mike V., Auto Service Technician
Category: Lexus
Satisfied Customers: 23816
Experience:  25 years of experience, Certified Subaru Technician and Nissan factory trained.
2921078
Type Your Lexus Question Here...
Mike V. is online now
A new question is answered every 9 seconds

I have a 1998 Lexus Gs300 with a intermittent starting

Customer Question

I have a 1998 Lexus Gs300 with a intermittent starting problem
JA: Will the headlights turn on? Is the battery fully charged?
Customer: The engine will turn over will not start sometime
JA: Are you fixing your GS300 yourself? What have you tried so far?
Customer: yes. I have replaced the fuel pump
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 month ago.
Category: Lexus
Expert:  Mike V. replied 1 month ago.

Hello and thank you for your question!
My name is ***** ***** I will be assisting you today. Please give me a moment to type my response. Thanks

Customer: replied 1 month ago.
Ok
Expert:  Mike V. replied 1 month ago.

Is the check engine light on when this happens?
Have you been able to test for lack of spark at all?

Customer: replied 1 month ago.
No the check engine light isn't on. I have spark at the plugs. After the car sits for awhile it starts
Expert:  Mike V. replied 1 month ago.

Ok, thanks for the info.

Does the car ever stall on you or is it simply you turn it off and it won't restart right away?

Customer: replied 1 month ago.
It never stalls out. you turn the key off go into store a when you return it will turn over but will not start
Expert:  Mike V. replied 1 month ago.

Ok

I think you could have a problem with the mass air flow sensor.

If the sensor is reading wrong, then it's going to cause a bad fuel mixture. This could prevent the car from starting. Especially since you have spark and no check engine light. It could be and indication the sensor is failing. Sometimes you can unplug the mass air flow sensor, then it will use a default setting. If you unplug it and the car fires right up, then you know the sensor is causing the problem and should be replaced.

The maf sensor is the one mounted in the air work between the throttle body and the air filter.

Give this test a try and let me know.

Please let me know what more I can do to assist you today. Also, please remember to rate my answer, Just Answer does not compensate me for my time and resources. Follow up questions are included in the price of your question. If you are using the free trial, or have a subscription a rating is still required.
Thank you so much!

Related Lexus Questions