No username? Register here.
  #1  
Old 08-08-2017, 08:00 PM
4683kelly 4683kelly is offline
Z Club member
Second gear
 
Join Date: Feb 2017
Location: Huddersfield
Posts: 50
Member 1119
Fuel Problem

Hi everyone,

I've been chipping away at restoring my 1972 240z for the past few months and finally turned the key a couple of weeks ago only to discover that my fuel pump wasn't working, this has now been replaced with a working original but fuel is still not reaching the fuel filter. I have fitted all new hoses and checked the lines are clear. Not sure what else might be stopping the fuel getting to the engine bay. Does anyone have any advice?

Thanks
Natalie
Reply With Quote
  #2  
Old 08-08-2017, 08:16 PM
Red7 Red7 is offline
Website member
Third gear
 
Join Date: Mar 2015
Location: Nottinghamshire
Posts: 378
So you've got an electric fuel pump instead of the mechanical one?

Have you looked at the fuel rail?
Reply With Quote
  #3  
Old 08-08-2017, 08:19 PM
Red7 Red7 is offline
Website member
Third gear
 
Join Date: Mar 2015
Location: Nottinghamshire
Posts: 378
I have a Facet fuel pump and fuel pressure regulator in mine
Attached Images
File Type: jpg IMG_5491.JPG (1.46 MB, 28 views)
File Type: jpg IMG_5492.JPG (1.66 MB, 23 views)
Reply With Quote
  #4  
Old 08-08-2017, 09:06 PM
jonbills's Avatar
jonbills jonbills is offline
Z Club member
Fifth gear
 
Join Date: Sep 2005
Location: M6
Posts: 2,403
Member 254
Fuel Problem

Looks like you've got the pump in the engine bay which is not ideal but prob not the problem.
I'd start by:
1. Check you got the supply and return lines the right way around
2. seeing if You can blow through the supply line into the tank
3. If no, disconnect supply line from tank at tank and try again.
At that point you'll know either your tank is blocked or your supply line is blocked.
__________________
1974 260z

Last edited by jonbills; 09-08-2017 at 08:38 AM..
Reply With Quote
  #5  
Old 08-08-2017, 09:45 PM
Red7 Red7 is offline
Website member
Third gear
 
Join Date: Mar 2015
Location: Nottinghamshire
Posts: 378
Quote:
Originally Posted by jonbills View Post
Looks like you've got the pump in the engine bay which is not ideal but prob not the problem.
I'd start by:
1. Check you got the supply and return lines the right way around
2. seeing if You can blow through the supply line into the tank
3. If no, disconnect supply line from tank at tank and try again.
At that point you'll eithet know your tank is blocked or your supply line is blocked.

Jon that's my engine bay
Reply With Quote
  #6  
Old 08-08-2017, 10:03 PM
jonbills's Avatar
jonbills jonbills is offline
Z Club member
Fifth gear
 
Join Date: Sep 2005
Location: M6
Posts: 2,403
Member 254
Quote:
Originally Posted by Red7 View Post
Jon that's my engine bay


Ah yes 😊
__________________
1974 260z
Reply With Quote
  #7  
Old 09-08-2017, 06:25 AM
SacCyclone's Avatar
SacCyclone SacCyclone is offline
Z Club member
Fourth gear
 
Join Date: Jan 2016
Location: Sacramento California USA
Posts: 591
Member 1066
Agree that you should look at the pick up point inside the fuel tank for a clogged screen.
__________________
Mike

1971 240Z Street/Track
1971 240Z Street
1973 240Z Ford V-8 Track
1969 Ford Torino 428 CJ
1970 Plymouth Roadrunner
(2) 240Z shell rollers
Reply With Quote
  #8  
Old 09-08-2017, 10:57 AM
Rob Gaskin's Avatar
Rob Gaskin Rob Gaskin is offline
Membership Secretary
Sixth gear
 
Join Date: Dec 2002
Location: Hinckley
Posts: 10,579
Member 214
Does the new pump work?

Feed fuel directly to it from a can etc and see if it pumps when the engine is turned over.

It may need priming.

Also try 'Easy-Start' with the help of a friend whilst turning the engine over. That might get the pump started.
__________________
240Z '71 Built and Modified by DJR
260Z Super Samuri
Reply With Quote
  #9  
Old 09-08-2017, 12:24 PM
Farmer42's Avatar
Farmer42 Farmer42 is offline
Z Club member
Third gear
 
Join Date: May 2014
Location: Downend, Bristol
Posts: 457
Member 979
Quote:
Originally Posted by Rob Gaskin View Post
Does the new pump work?

Feed fuel directly to it from a can etc and see if it pumps when the engine is turned over.

It may need priming.

Also try 'Easy-Start' with the help of a friend whilst turning the engine over. That might get the pump started.

I seem to recall that you posted a thread a few weeks back looking for a replacement mechanical pump. I also seem to recall reading somewhere that mech pumps suffer with vapour lock and this can be compounded by a blocked breather hose on the tank as it won't suck the fuel through and expel the air in the pipes.

As Rob has said, you will need to prime the lines but to aid breathing, remove the fuel filler cap on your tank whilst you are turning it over and also take the hoses off the top of the float chambers on the carbs and ensure fuel pumps out. You can collect it in a jar or something to stop fuel pumping all over your engine. Replace the cap & hoses when you have fuel coming through.

My advice is to follow what they did with the 260Z and install an electric pump near the tank to push the fuel through to the engine bay which was to overcome the vapour lock.
__________________


1975 Fairlady Z 2+2
Reply With Quote
  #10  
Old 09-08-2017, 09:26 PM
Sam_C Sam_C is offline
Z Club member
Third gear
 
Join Date: Dec 2004
Location: Hutton Buscel, North Yorkshire
Posts: 304
Member 1067
Did the 260z have a mechanical and an electric fuel pump? How were the lines set up, did the electric pump go to a reservoir or have a return line or...?
Reply With Quote
  #11  
Old 09-08-2017, 10:13 PM
Mr Ex Jnr's Avatar
Mr Ex Jnr Mr Ex Jnr is offline
I'm waiting for the Sam
Fourth gear
 
Join Date: Jul 2008
Location: Huddersfield
Posts: 734
Member 130
How are you trying start it by the way

ie does it have a choke leaver.

Mine won't start on just a turn of the key

Have you tried pumping the accelerater pedal for a good 20 seconds or more

Mine doesn't have a choke but when it hasn't been run for a bit it all avaporates out of the carbs so you have to sit and pump the throttle for good 20 secs then normally catch it on key with some light throttle
Reply With Quote
  #12  
Old 09-08-2017, 11:00 PM
tallphil1961 tallphil1961 is offline
Website member
Stuck in reverse
 
Join Date: Jul 2017
Location: essex
Posts: 7
The 260 I have just put on the road after it had been hidden in a garage for 7years had the fuel pickup pipe in the fuel tank blocked by solidified fuel and rush, we used a piece of old house hold net curtain taught and a hand drill to rotate it as we pushed it down the pipe, , also had to remove and clean float needles and wash out main jets with carb cleaner and air line as these were also blocked with a green gunge of old fuel, stared straight up afterwards
Reply With Quote
  #13  
Old 10-08-2017, 11:27 PM
Farmer42's Avatar
Farmer42 Farmer42 is offline
Z Club member
Third gear
 
Join Date: May 2014
Location: Downend, Bristol
Posts: 457
Member 979
Quote:
Originally Posted by Sam_C View Post
Did the 260z have a mechanical and an electric fuel pump? How were the lines set up, did the electric pump go to a reservoir or have a return line or...?
Mine certainly has and it has the wiring loom as standard that feeds it. The electric one is mounted on the rear chassis near the tank and is mainly used to push the fuel to the front with a constant pressure. The mech pump sort of regulates the pressure and pumps it to the carbs at the right flow rate (or so it seems). The return line runs from the fuel rail directly back to the tank. I have 2 fuel filters in the lines - one at the rear before the electric pump and one in the engine bay before the mech pump.

Can't say that this set up is the same for all 260Z though. It sounds like most have done away with the mech pump.
__________________


1975 Fairlady Z 2+2
Reply With Quote
Reply

Thread Tools
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

Forum Jump


All times are GMT +1. The time now is 06:22 AM.

The Future Is Bright... The Future Is ZClub!

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright ZClub.net, All Rights Reserved.