General Tech Help Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

Lexus LS400

Old 08-22-2008, 09:38 AM
Thread Starter
Join Date: Aug 2008
Posts: 3
Default Lexus LS400


About 10 months ago I came into ownership of an LS400 which I am having problems with now. I come here because nowhere in and or the surrounding towns has the right Dx plug to fit my car.

I have 2 problems;

When sitting to idle for about 5 minutes the idle turns rough. When the idle becomes rough the RPM's drop so low that the can is about to kill over. Just before it reaches the point of dieing the RPM's spike for a fraction of a second and once again drop. This will happen 2-4 times until it finally does kill over.

Another problem is that when starting off from a dead stop the car will hesitate until I put the gas petal down far enough to force the car past the hesitation. After the car hits about 25MPH and up everything run fine.

I was hoping that someone could give me some insight into what this problem might be and maybe a few good ways to fix it. If not then at least some info of how to find a place with the right plug to fit my car for a Dx test.

Thanks to everyone that replies. God bless.
Old 09-17-2008, 09:19 PM
Join Date: Sep 2008
Posts: 3
Default RE: Lexus LS400

Re: Your Lexus prtoblem:
Did you ever get the solution for your runability problem? I have an LS400 with the same or similar condition. Please reply.
Jerry S.
Old 10-12-2008, 05:32 PM
Thread Starter
Join Date: Aug 2008
Posts: 3
Default RE: Lexus LS400

Well $665.28 later, the only thing that anyone could tell me was that the ECU isn't working right.
Related Topics
Thread Starter
Last Post
Lexus LS
10-23-2012 11:53 AM
PRIVATE For Sale / Trade Classifieds
03-02-2010 08:08 PM
General Tech Help
11-01-2009 02:33 AM
PRIVATE For Sale / Trade Classifieds
12-17-2008 09:09 AM
PRIVATE For Sale / Trade Classifieds
03-07-2007 04:02 PM

Thread Tools
Search this Thread
Quick Reply: Lexus LS400

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.