IndyRon Posted March 27, 2004 Share Posted March 27, 2004 I am soooo stuck, i have a 97 lexus ls400 driving home one day on the interstate, I noticed a change in throttle. after getting off the interstate i had NO power at accelleration cant out run a metro! finally gets up to speed but cant get a good kick down at high speeds can barely make it up a hill from a dead stop! I am LUCKY if i get 5 miles to the gallon and the fumes are BAD! (smells like raw feul). If i put my foot on the brake and give it a lot of gas I have very little pull transmission checked out fine code check on engine light suggested Throttle response Sensor, and rich AND lean feul mixtures! so 480.00 later we changed the sensor NOTHING the shop suggested AFTER they changed the TRS that it was the catylic converter that it had collasped, so I took it to a muffler shop, nope not it! any suggestions at all? how could cleaning the throttle body help with the dramatic loss of fuel? it would seem that it would not go anywhere! Quote Link to comment Share on other sites More sharing options...
VMF Posted March 28, 2004 Share Posted March 28, 2004 why dont you start by checking sprk plugs and whole ignition system? Quote Link to comment Share on other sites More sharing options...
jimbostar Posted March 28, 2004 Share Posted March 28, 2004 Then check your oxygen sensors. Quote Link to comment Share on other sites More sharing options...
93LSOwner Posted March 28, 2004 Share Posted March 28, 2004 Here is a procedure of just a regular Throttle Body Cleaning: http://www.lextreme.com/tb.htm Quote Link to comment Share on other sites More sharing options...
VBdenny Posted March 28, 2004 Share Posted March 28, 2004 Be sure you cat isn't clogged. Restricted exhaust will cause this type of problem and it comes on fairly quick. A plymouth I had did this and I was down to 45 mph max by the time I got home. Quote Link to comment Share on other sites More sharing options...
handygal Posted April 1, 2004 Share Posted April 1, 2004 I had something similar happen in another car. Clogged fuel filter. I just barely made it up and over an enormous bridge and coasted down the other side to the nearest gas station. My mother declared "gas filter!" having been through this many years before. My father (one time mechanic) grumbled, no way not possible. He checked everything he could think of, finally agreed to check the filter and low and behold, even I could see that baby was clogged. The trouble came on suddenly, about 3 hours in to a 10 hour road trip. We had been driving just fine, mostly on highways until then. I can't say what the emmissions were like, though I think they were kind of smokey. I was just try to not get run over on that dumb bridge. It's worth a shot. One of the least complicated possibilities. Quote Link to comment Share on other sites More sharing options...
IndyRon Posted April 2, 2004 Author Share Posted April 2, 2004 can a clogged fuel filter alter you mpg by 50%? how is that possible? Quote Link to comment Share on other sites More sharing options...
ADF Posted July 24, 2016 Share Posted July 24, 2016 I have the same problem. It fixed the problem for a couple of days but now it's back the same. When I changed the fuel filter, it was black fuel coming out the filter. It still spotters a bit and still won't get over 55mph. I plan to change the plugs and wires next week to see if it will help some, but I'm going to have diagnostics ran on It soon before. Quote Link to comment Share on other sites More sharing options...
Exhaustgases Posted July 24, 2016 Share Posted July 24, 2016 Engine coolant temperature sensor is suspect in this. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.