Question about 1993 Lexus Ls 400
you will have to replace the complete speed/tack
asy. they are know for going out. very common.try internet for good deals on reman units.
Posted on May 27, 2009
Check your MAF and MAP sensor. The first 80% of your throttle signal from the TPS works with the O2 sensor to try to keep the air fuel ratio to 14.7 to 1 with the ECM controlling the fuel injector spray time and timing the ignition. After the 80% to WOT the ECM puts the O2 sensor in to an open loop and takes the Reading form the MAF and MAP sensor to run the engine richer so there will not be any Detonation to the engine and burning holes in the valves for running too lean. That is why it always feel like you get a little more when you ease off on the gas peddle from WOT. Recap check the TPS, MAF,and MAP sensor and wires to those sensors, if you can get the car scanned that would be great and you may find out which sensor may have gone bad, the other thing to is the fuel pressure regulator may be going bad and at WOT the pressure may be to high causing it to run to rich causing the loss of power. Good luck and hope this helps.
Posted on Jul 04, 2009
I HAD THE SAME PROBLEM WITH MY CAR. 93 LS 400. THAT WOULD BE YOUR FUEL FILTER OR THE FUEL PUMP GOING BAD. TRY CHANGING THE FILTER FIRST. THE DEALER TRIED TO CHARGE ME $980 TO CHANGE FUEL PUMP.
Posted on Jul 23, 2009
Not too bad. Not much room, just enough to drop the starter. It is probably easier to go up through exhaust if you can get your exhaust shield off the manifold .
Posted on Aug 07, 2009
WE ARE AN AUTO REPAIR SHOP IN ROCK HILL SC. WE HAVE RUN INTO THIS PROBLEM BEFORE. WE CAN REPAIR THIS, PARTS AND LABOR APPROXIMATELY 625.00, WITH A 12/12 WARRANTY. CONTACT EAST COAST PERFORMANCE AT 803-329-3868
Posted on Nov 19, 2009
Tips for a great answer:
Apr 30, 2014 | 1991 Lexus ES 250
Apr 04, 2012 | Lexus LS 400 Cars & Trucks
Dec 04, 2010 | 1993 Lexus Ls 400
Oct 25, 2010 | 1991 Lexus LS 400
Dec 21, 2017 | 1993 Lexus Ls 400
Feb 11, 2010 | 1993 Lexus Ls 400
May 21, 2009 | 1992 Lexus Ls 400
Feb 15, 2009 | 1993 Lexus Ls 400
292 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: