Go Back   Club Lexus Forums > Lexus Model Forums > SC Models > SC 400/300 > Performance & Maintenance
Sign in using an external account
Register Forgot Password?

where is the DIY for fuel pump relacement

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 08-12-14, 04:03 PM   #1
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default where is the DIY for fuel pump relacement

My 93 SC400 recently would not start after a long drive, so Im going to change the orig. fuel pump. My rear seat area has been upholstered in tweed, so I would like to see some pics. of which panel is the fuel pump access panel. Looked through the DIY section and all I see is about the fuel pump ECU.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-12-14, 04:08 PM   #2
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default

I have a pic of the area and there is a small round circle with no bolts and a larger square panel. This is an old pic, its all covered in tweed now.
Attached Images
 
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-12-14, 04:47 PM   #3
t2d2
Lexus Test Driver
Trader Score: (4)
 
t2d2's Avatar
 
Join Date: Apr 2014
Location: Oregon
Posts: 1,171
Default

Pry that circular panel off and you'll see the fuel pump (tank) cover behind it. Once you unbolt the inner cover, you'll be able to fish the pump out. Which is somewhat easier said than done, due to the tight space and having to disconnect it.
__________________
'94 SC400: Goodkat ... "It's not something people hear about. Falls on deaf ears mostly. This particular one has been over twenty years in the making."
t2d2 is online now   Reply With Quote
Old 08-12-14, 04:48 PM   #4
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default

So is it any easier if you remove the big square panel?
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-12-14, 04:55 PM   #5
t2d2
Lexus Test Driver
Trader Score: (4)
 
t2d2's Avatar
 
Join Date: Apr 2014
Location: Oregon
Posts: 1,171
Default

Doubtful. That would make for a little less depth to reach through, but only like half an inch. The opening into the tank would still be the same size.
__________________
'94 SC400: Goodkat ... "It's not something people hear about. Falls on deaf ears mostly. This particular one has been over twenty years in the making."
t2d2 is online now   Reply With Quote
Old 08-12-14, 05:06 PM   #6
soarer13oy
Lexus Champion
Trader Score: (13)
 
soarer13oy's Avatar
 
Join Date: Feb 2008
Location: Sacramento
Posts: 2,191
Default

Theres no need to remove the square panel doesnt make it any easier. Just get a flat head a pry the circle panel open. Bolts that are holding the pump in are 8mm bolts.
__________________
13.2 @109 2.3x 60' (2jzgte usdm twins)
http://www.youtube.com/watch?v=MvPbByDcFM8
http://www.youtube.com/watch?v=At6iZ-vPFBU
Borg warner s366, 2jzgte head/ ge block, ls400 brakes, ccw classics, map ecu, 550cc, 4" dp, 3" dual exit exhaust, aem cam gears
soarer13oy is offline   Reply With Quote
Old 08-12-14, 05:26 PM   #7
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default

That is such good news, I had my upholster guy make a removable square panel over the round door. Wasnt sure but thought it was covering the fuel pump. I would have been sick to cut my tweed.
Attached Images
 
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-14-14, 06:08 PM   #8
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default

Fuel [pump replacement complete, if you have over 1/4 tank of gas you'll need a piece of flexible vinyl hose and siphon out the gas until it gets to 1/4. Before you remove the fuel pump cover.
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-15-14, 06:56 PM   #9
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default

UPDATE...Drove the car after new Denso fuel pump, thought it was running better than ever. After my second stop with car nice and hot, car would not drive off but only stall. Jumped the fuel pump ECU and drove fine. Lex wants big bucks for new ECU so is it really OK to bypass the ECU with no downsides?
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-15-14, 07:03 PM   #10
t2d2
Lexus Test Driver
Trader Score: (4)
 
t2d2's Avatar
 
Join Date: Apr 2014
Location: Oregon
Posts: 1,171
Default

As far as I know, there's no real downside to running with the pump ECU bypassed. It just keeps the pump from running at low speed when okay (not really an issue since much of the gas is recirculated, anyway), shutting off the tank in an accident, etc.

I've been meaning to ask this, and here might be as good of a place as any. With how common pump ECU failure supposedly is, has anyone opened theirs up to see if it's simply a capacitor leakage issue like with the engine ECU? bigwhite, do you have your side panel out currently to get at the pump ECU for an inspection?

If that's all it is, a couple bucks for new capacitors might solve the problem.
__________________
'94 SC400: Goodkat ... "It's not something people hear about. Falls on deaf ears mostly. This particular one has been over twenty years in the making."
t2d2 is online now   Reply With Quote
Old 08-15-14, 07:09 PM   #11
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default

Yes, Ive got the ECU off of the car, but it looks epoxy sealed. Ill go to garage to verify. Impressive looking ECU with aluminum cooling fins and all. No wander its so expensive.
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-15-14, 07:14 PM   #12
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default

Just looked at it, I dont think anyone will be repairing it. I called Toyota since it says Toyota on it, hoping they would sell it cheaper but no go. Some comp[any may make it aftermarket.
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-15-14, 11:49 PM   #13
t2d2
Lexus Test Driver
Trader Score: (4)
 
t2d2's Avatar
 
Join Date: Apr 2014
Location: Oregon
Posts: 1,171
Default

What makes you say you don't think anyone will be repairing it? Too difficult to open?

You can buy used ones fairly cheap, but there's no guarantee they'll last much longer...
__________________
'94 SC400: Goodkat ... "It's not something people hear about. Falls on deaf ears mostly. This particular one has been over twenty years in the making."
t2d2 is online now   Reply With Quote
Old 08-16-14, 01:46 PM   #14
bigwhite
Pole Position
Trader Score: (0)
 
bigwhite's Avatar
 
Join Date: Sep 2013
Location: In
Posts: 214
Default

The ECU is a sealed unit. Since I have replaced my fuel pump and my car is still not fixed i finally searched the forumn for fuel pump ECU and there is a lengthy thread called SC300 12V. fuel mod w./ pictures. 15 pages and Im only 1/2 way through. One of the subjects of doing the bypass is that I got a fast idle when I first started the car and put it in gear, nearly running over someone. It seamed to go to reg idle after 1/2 mile.
__________________
93 SC400 front and rear strut tower bars, BFI--- A.C., sunroof , rear wing and C.D. changer delete
bigwhite is offline   Reply With Quote
Old 08-16-14, 02:25 PM   #15
t2d2
Lexus Test Driver
Trader Score: (4)
 
t2d2's Avatar
 
Join Date: Apr 2014
Location: Oregon
Posts: 1,171
Default

Damn, that sucks. I'd be curious to hear if anyone knows if there's a good reason why it's a sealed unit...
__________________
'94 SC400: Goodkat ... "It's not something people hear about. Falls on deaf ears mostly. This particular one has been over twenty years in the making."
t2d2 is online now   Reply With Quote
Old 08-16-14, 02:25 PM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY fuel pump change on GS300 sandfire Performance 22 04-23-14 09:19 AM
GA WTB: Fuel Pump,Power Steer Pump FlorianSC3 SC400 / 300 Classifieds 1 03-24-13 09:29 PM
Walbro pump gs400 for bad stock pump? pitmanr200 Performance 5 11-03-10 11:03 AM
Toyota Soarer (SC chassis) Power to Fuel Pump Retox Maintenance 11 12-27-09 10:54 AM
Toyota Soarer (SC chassis) Power to Fuel Pump Retox Performance & Maintenance 9 12-20-09 04:19 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 03:00 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info