Question about Lexus SC 400

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1993 lexus sc 400 chokes and quits

My 1993 Lexus sc 400 will start and run fine the first time out but any time I try to start it after that, it will start and then choke itself off. It happens even if I stop for a quick errand. I can't rev it up. It sounds as if the exhaust is sputtering and then it quits. Usually I can turn it over 3-4 times and it will eventually stay running. There is no common denominator when it happens. Any suggestions?

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  • Contributor
  • 19 Answers

Check fuel pressure possible fuel pump issue

Posted on Apr 01, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: Lexus won't stay running

Having same issue here. Try to change mass air flow sensor (bad news for you, it costs about $400)

Posted on Aug 27, 2008

  • 6982 Answers

SOURCE: Blazer rumbling,choking,missing in engine

Check the fuel pressure regulator. generally "failure" position is full open which will richen up the fuel mixture. also check vacuum line to the regulator for cracks and good connection.

Posted on Jun 06, 2009

  • 1 Answer

SOURCE: Lexus SC300 95 Several tries before starting.

Had the same problem. In my case, it was the battery cable ends that needed replacing. Car works fine now.

Posted on Aug 24, 2009

  • 163 Answers

SOURCE: I have a 1999 Lexus GS300. When trying to start

sounds like the pump and i think on moust lexus and toyota pump is in the gas tank under your back seat

Posted on Jan 02, 2010

Molson02536
  • 3854 Answers

SOURCE: we have a 2006 Chevy Aveo and it is having a

Start with replacing the fuel filter. The Aveo fuel filter is located passenger-side rear, in front of the rear tire.

If there is no filter there, then the filter is a non serviceable filter and is integrated with the fuel sending unit. Your going to have to replace the fuel sending unit if the fuel pressure is slow, start with running fuel injector cleaner through the fuel system for the next few fill up's and hope that will clear up the issues your having.

The other thing to is that your IAC (idle air control) valve may be dirty and is stuck close, you can try cleaning it by spraying Throttle body cleaner through the throttle body, paying attention to the IAC passageway. A dirty of faulty EGR valve will also do the same thing.

Start with the simple and inspect to see if you do have a external fuel filter, and inspect the wire leads to the IAC, EGR and clean them with throttle body cleaner. Don't forget to run the fuel injector cleaner through your gas tank.

Thank you for using Fixya and good luck.

Posted on Apr 17, 2010

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