LS 430 Acceleration issues - Club Lexus Forums

Log In 

LS 430 Acceleration issues

Reply
 
 
 
Thread Tools Search this Thread
Old 06-19-12, 02:39 PM   #1
amcb
Driver School Candidate
Thread Starter
 
Join Date: Jun 2011
Location: AZ
Posts: 11
Default LS 430 Acceleration issues

My 2002 LS 430 recently started misbehaving. When I floor the accelerator the car hesitates 3-4 sec then starts to accelerate. Almost like it cant find the gears. and once it starts accelerating it does not really go like it used to.

Any ideas?
amcb is offline   Reply With Quote
Old 06-19-12, 02:50 PM   #2
Dirtyd210
Driver
 
Dirtyd210's Avatar
 
Join Date: Apr 2010
Location: TX
Posts: 113
Default

you arent using regular gas are you? poor performance can result...
Dirtyd210 is offline   Reply With Quote
Old 06-19-12, 03:07 PM   #3
amcb
Driver School Candidate
Thread Starter
 
Join Date: Jun 2011
Location: AZ
Posts: 11
Default LS 430 Acceleration issues

Dirty D's Thanks, good point but this is beyond a quality of gas issue.
amcb is offline   Reply With Quote
Old 06-19-12, 03:28 PM   #4
AlexusAnja
Moderator
 
AlexusAnja's Avatar
 
Join Date: Mar 2006
Location: NY/NJ
Posts: 4,168
Default

Could be throttle sensor is bad... had that issue with my RX. MAF might be bad too... hard to say.
AlexusAnja is offline   Reply With Quote
Old 06-19-12, 06:34 PM   #5
RWR
Driver School Candidate
 
Join Date: Dec 2010
Location: Tx
Posts: 5
Default

My 2001 LS430 had a similar issue. The problem turned out to be an erratic MAF sensor and a dirty throttle body. Dealer replaced the MAF sensor and cleaned the throttle body and now it runs like new again. The transmission was not touched.
RWR is offline   Reply With Quote
Old 06-19-12, 10:12 PM   #6
ancdmd
Lexus Test Driver
 
Join Date: Mar 2007
Location: Miami Beach, FL
Posts: 1,004
Default

Do you have any engine knock/pinging?
ancdmd is offline   Reply With Quote
Old 06-20-12, 06:52 AM   #7
amcb
Driver School Candidate
Thread Starter
 
Join Date: Jun 2011
Location: AZ
Posts: 11
Default

Wouldn't this condition through a check engine light error, But this has not happened.

Did your condition turn on your check engine light?
amcb is offline   Reply With Quote
Old 06-20-12, 06:53 AM   #8
amcb
Driver School Candidate
Thread Starter
 
Join Date: Jun 2011
Location: AZ
Posts: 11
Default

Was your check engine light on with the erratic MAF?
amcb is offline   Reply With Quote
Old 06-20-12, 06:53 AM   #9
amcb
Driver School Candidate
Thread Starter
 
Join Date: Jun 2011
Location: AZ
Posts: 11
Default

No knocking or pinging.
amcb is offline   Reply With Quote
Old 06-25-12, 04:15 AM   #10
RWR
Driver School Candidate
 
Join Date: Dec 2010
Location: Tx
Posts: 5
Default

The check engine light was NOT on when my LS430 had this problem. Dealer did say there was a history of some MAF codes but they did not cause the check engine light to illuminate.
RWR is offline   Reply With Quote
Old 06-26-12, 09:48 PM   #11
jholem1
Driver School Candidate
 
Join Date: Mar 2009
Location: Louisiana
Posts: 4
Default

I had a similar problem and it turned out to be a bad fuel pump. Had it replaced and no more problems.
jholem1 is offline   Reply With Quote
Old 06-27-12, 07:55 AM   #12
parkerjs
Driver
 
Join Date: Nov 2003
Location: Michigan
Posts: 105
Default

Sure sounds more like a mixture problem than a transmission problem. Are there any codes to help narrow the possibilities?
parkerjs is offline   Reply With Quote
Old 04-03-13, 03:29 PM   #13
amcb
Driver School Candidate
Thread Starter
 
Join Date: Jun 2011
Location: AZ
Posts: 11
Default

I had it diagnosed and it turns out the K&N filter I use was allowing too much dust/oil past and built up on MAF sensor, cleaned that, problem went away.
amcb is offline   Reply With Quote
Old 04-03-13, 03:51 PM   #14
HiloDB1
Lexus Test Driver
iTrader: (3)
 
HiloDB1's Avatar
 
Join Date: Jun 2010
Location: Hilo, Hawaii
Posts: 967
Default

Good to know. Also appreciate you updating this thread with what you found and how you corrected your issue. This will definitely be a help to someone else at some point.
HiloDB1 is offline   Reply With Quote
Old 04-03-13, 06:28 PM   #15
Lust4Lexus
Lead Lap
 
Lust4Lexus's Avatar
 
Join Date: Dec 2009
Location: NY
Posts: 735
Default

Quote:
Originally Posted by amcb View Post
I had it diagnosed and it turns out the K&N filter I use was allowing too much dust/oil past and built up on MAF sensor, cleaned that, problem went away.
Throw that thing away. It's not worth the troubl imho.
Lust4Lexus is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Upshifting early RushNatU LS - 3rd Gen (2001-2006) 6 04-02-16 03:57 PM
accelerator - hard to push? johnnylt LS - 3rd Gen (2001-2006) 3 08-15-15 06:15 AM
1994 es300 slow acceleration/ hesitation at take off Betsy1994 ES - 1st to 4th Gen (1990-2006) 1 06-26-15 04:29 AM
Thump noise with quick acceleration tgonder GS - 2nd Gen (1998-2005) 17 02-05-15 11:14 AM
engine misses panhead52 LS - 1st and 2nd Gen (1990-2000) 7 10-18-14 10:41 AM


Tags
2001, 430, accelaration, acceleration, car, info, issue, lexus, ls, ls430, lsmodels, models, poor, problem, problems, thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -7. The time now is 09:50 PM.


Copyright © 2000-2016 Internet Brands, Inc. All Rights Reserved