Notices
SC - 1st Gen (1992-2000)

MAF problem?

Thread Tools
 
Search this Thread
 
Old Apr 1, 2008 | 06:02 PM
  #1  
VJZ's Avatar
VJZ
Thread Starter
Lead Lap
iTrader: (3)
 
Joined: Sep 2007
Posts: 743
Likes: 0
From: Northern Indiana
Default MAF problem?

Today I changed the dizzy cap and rotor and also cleaned the MAF and t-body with choke and carb cleaner (apparently a mistake)


Now, the car idles weird AND the TRAC off and CEL come on under 1500 RPM or so.


Did I seriously screw this thing up?
Reply
Old Apr 1, 2008 | 06:35 PM
  #2  
Dx3's Avatar
Dx3
Lexus Fanatic
iTrader: (13)
 
Joined: Jul 2003
Posts: 10,681
Likes: 9
From: Tulsa, Oklahoma
Default

Did you make sure you plugged your MAF back in properly?

Jonny
Reply
Old Apr 1, 2008 | 07:30 PM
  #3  
VJZ's Avatar
VJZ
Thread Starter
Lead Lap
iTrader: (3)
 
Joined: Sep 2007
Posts: 743
Likes: 0
From: Northern Indiana
Default

I'm fairly certain I did. Its one plug...lol.

I sprayed it down quite well and in the throttle body as well while the intake was off.
Reply
Old Apr 1, 2008 | 07:49 PM
  #4  
VJZ's Avatar
VJZ
Thread Starter
Lead Lap
iTrader: (3)
 
Joined: Sep 2007
Posts: 743
Likes: 0
From: Northern Indiana
Default

I don't have a working car now...lol

I squirted a ton of choke and brake cleaner into the throttle body and watched it brown up and run back out. Hopefully I'm referring right to the MAF (Right after the air filter box and before the intake pipe?) I also cleaned the first O2 sensor with carb cleaner. Everything is hooked up right so I think

Other than that all I did was remove the heat shield from the exhaust manifold to paint it black.

What happens now is that the car will sputter a few times and then drop to zero. Occasionally can get it to run if you floor it and let it rest after a few minutes but then under two grand or so it throws the CEL and TRAC off lights.

I'm stumped. And broke


EDIT: I searched about this and I read that the 1UZFE pre OBDII MAF from either the LS or SC400 will work with slight modification. I can get one from a salvage yard. WOuld that do the trick? I can't think of other parts that I knocked around
Reply
Old Apr 1, 2008 | 07:53 PM
  #5  
breakb's Avatar
breakb
Lead Lap
iTrader: (2)
 
Joined: Feb 2008
Posts: 790
Likes: 1
From: Hawaii
Default

have to replace the MAF. ppl spray it, and alot of ppl say it throws CEL's and stuff...

Peace out
Reply
Old Apr 1, 2008 | 08:05 PM
  #6  
VJZ's Avatar
VJZ
Thread Starter
Lead Lap
iTrader: (3)
 
Joined: Sep 2007
Posts: 743
Likes: 0
From: Northern Indiana
Default

I think I'm going to have to.

I just hope the 400 one will work for me. At least for a while.
Reply
Old Apr 2, 2008 | 11:27 AM
  #7  
VJZ's Avatar
VJZ
Thread Starter
Lead Lap
iTrader: (3)
 
Joined: Sep 2007
Posts: 743
Likes: 0
From: Northern Indiana
Default

I just picked up an SC400 MAF at a junk yard. They said the engine was running when the car was wrecked and was only there because of the body damage.

Any advice to stick this sucker in?
Reply
Old Apr 2, 2008 | 11:54 AM
  #8  
Dx3's Avatar
Dx3
Lexus Fanatic
iTrader: (13)
 
Joined: Jul 2003
Posts: 10,681
Likes: 9
From: Tulsa, Oklahoma
Default

Those are the exact symptoms of a bad MAF - been through several over the years.

As for SC400 to SC300 I have no idea. Didn't know it was possible. I would have spent the extra money and gotten an SC300 MAF.

Don't forget to reset your ECU

Jonny
Reply
ClubLexus Stories

Celebrating Lexus & Toyota from Around the Globe

story-0

10 Lexus Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-1

8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

 Michael S. Palmer
story-2

10 Best Lexus Models No One Remembers

 Joe Kucinski
story-3

TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

 Michael S. Palmer
story-4

Top 10 Lexus & Toyotas to Drive Before You Die!

 Joe Kucinski
story-5

Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

 Joe Kucinski
story-6

Lexus LC500 Convertible Auction: A Preview of Rising Values?

 Brett Foote
story-7

GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

 Michael S. Palmer
story-8

9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

 Joe Kucinski
story-9

2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

 Brett Foote
Old Apr 2, 2008 | 12:40 PM
  #9  
Gunnar's Avatar
Gunnar
Lexus Champion
 
Joined: Sep 2006
Posts: 1,626
Likes: 8
From: Kansas City
Default

I've cleaned out my MAF a few times before I went with the MAP ECU. I use electric contact cleaner and have never messed it up.

The SC400 MAF will work. It's an upgrade for NA-T guys because it can read more airflow before it maxes out and works better with bigger injectors.
Reply
Old Apr 2, 2008 | 01:01 PM
  #10  
sc400injen's Avatar
sc400injen
Driver School Candidate
 
Joined: Mar 2006
Posts: 48
Likes: 0
From: fl
Default

i was told that the air flow sensor is a laser read one, that's why the carb cleaner ****ed up the laser reading, causing it to run like *****, jus for future reference, peace mane


-Knowledge
Reply
Old Apr 2, 2008 | 02:52 PM
  #11  
breakb's Avatar
breakb
Lead Lap
iTrader: (2)
 
Joined: Feb 2008
Posts: 790
Likes: 1
From: Hawaii
Default

so if we want to clean it use electric contact cleaner? i should wait till i save up enough money to buy another one if i mess it up, lol.

peace out
Reply
Old Apr 2, 2008 | 03:32 PM
  #12  
Gunnar's Avatar
Gunnar
Lexus Champion
 
Joined: Sep 2006
Posts: 1,626
Likes: 8
From: Kansas City
Default

Use electric contact cleaner and then let it sit and dry before you hook it back up. It dries pretty quickly but I've always done it before I went to bed.
Reply
Old Apr 3, 2008 | 08:16 AM
  #13  
VJZ's Avatar
VJZ
Thread Starter
Lead Lap
iTrader: (3)
 
Joined: Sep 2007
Posts: 743
Likes: 0
From: Northern Indiana
Default

Do you think its still usable?

I picked one up from an SC400 and swapped sensors, not the housing.


I will N-E-V-E-R own an SC400. That thing is such a PITA to work on. It took me probably a good 45 minutes to get out the MAF sensor and housing.


That is in comparison to the five minutes it takes for my 300.

Good grief...lol
Reply
Old Apr 3, 2008 | 10:48 AM
  #14  
Gunnar's Avatar
Gunnar
Lexus Champion
 
Joined: Sep 2006
Posts: 1,626
Likes: 8
From: Kansas City
Default

Why did you swap it all? I believe you could've just plugged it in and put it in place of the SC300 one.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jonas's RX
SC430 - 2nd Gen (2001-2010)
11
Feb 24, 2018 04:02 PM
Jabberwock
LS - 3rd Gen (2001-2006)
17
Feb 20, 2015 02:39 PM
ThomasGS4
Performance
33
Mar 6, 2013 01:45 PM
Billh2
GS - 2nd Gen (1998-2005)
48
Jul 22, 2011 12:16 AM
breakb
Maintenance
6
Oct 20, 2008 04:56 PM




All times are GMT -7. The time now is 09:46 AM.

story-0
10 Lexus Designs That Have Aged Like Fine Wine

Slideshow: Some luxury cars chase trends, but these Lexus models look better now than they did when they first rolled into showrooms.

By Verdad Gallardo | 2026-05-06 17:58:29


VIEW MORE
story-1
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Slideshow: How to Get the Best Fuel Economy with a Hybrid and Plug-In Hybrid!

By Michael S. Palmer | 2026-05-05 20:54:44


VIEW MORE
story-2
10 Best Lexus Models No One Remembers

Slideshow: 10 best Lexus models no one remembers.

By Joe Kucinski | 2026-05-05 17:33:28


VIEW MORE
story-3
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Slideshow: diving into 4Runner TRD Off-Road Premium's pricing, performance, fuel economy, features, and amenities!

By Michael S. Palmer | 2026-04-23 13:09:18


VIEW MORE
story-4
Top 10 Lexus & Toyotas to Drive Before You Die!

Slideshow: the 10 Lexus and Toyota vehicles you need to drive before you die.

By Joe Kucinski | 2026-04-23 10:34:24


VIEW MORE
story-5
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Slideshow: Top 10 Lexus/Toyota models with the lowest 5-year depreciation rate.

By Joe Kucinski | 2026-04-08 12:19:06


VIEW MORE
story-6
Lexus LC500 Convertible Auction: A Preview of Rising Values?

The LC hasn't even disappeared from the Lexus lineup yet, and we're already seeing signs of an explosive market.

By Brett Foote | 2026-04-06 09:25:02


VIEW MORE
story-7
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Slideshow: comparing the pricings, specs, power, fuel economy, fun-factor, and features of the GX 550 Luxury+ and TX 550h+ Luxury.

By Michael S. Palmer | 2026-03-19 13:44:11


VIEW MORE
story-8
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Slideshow: 9 best Lexus models you can buy for half price and 1 you should avoid

By Joe Kucinski | 2026-03-19 12:01:07


VIEW MORE
story-9
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Here's everything you need to know about the latest NX.

By Brett Foote | 2026-03-19 11:56:59


VIEW MORE