626 fuel consumption - Mazda Forum - Mazda Enthusiast Forums


Mazda 323,Mazda 626 & Mazda 929 Whether the compact 323, the mid sized 626, or the full sized 929, these vehicles remain very popular even though production has stopped.

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 02-13-2006, 11:28 AM
Thread Starter
 
Join Date: Feb 2006
Posts: 3
Default 626 fuel consumption

Just bought an old 1991 626 and it sucks fuel like it owns Kuwait. 10 MPG! Its sucking so much I can see the fuel guage moving! Starts easy from cold, but not always when warm. Sometimes stalls and then very reluctant to re-start. Ok, it's old, so would it make more sense to just pass it on or is it an easy fix?
Thanks
ET
Reply With Quote
  #2  
Old 02-13-2006, 12:31 PM
Senior Member
 
Join Date: Jan 2006
Location:
Posts: 124
Default RE: 626 fuel consumption

kinda sounds like its outta timeing and thats an easy fix
Reply With Quote
  #3  
Old 02-13-2006, 08:36 PM
Senior Member
 
Join Date: Sep 2005
Posts: 1,446
Default RE: 626 fuel consumption

The first question is, does the engine get up to normal operating temp? Does the temp gauge go up about half way? Im asking because the thermostat may not be operating properly, or just not installed. This is the most common problem with poor MPG because the PCM cannot go into closed loop. Another place to look is at the fuel pressure regulator on the fuel rail. The diaphragm can be broken allowing fuel into the engine. Then there is normal maintenance like a tune up.
Reply With Quote
  #4  
Old 02-14-2006, 08:29 AM
Thread Starter
 
Join Date: Feb 2006
Posts: 3
Default RE: 626 fuel consumption

Thanks for the suggestions. The operating temp seems fine, needle goes about 1/2 way. Just looking at exhaust suggests it's running rich, so a service might be the thing. Is it possible to turn off or disconnect the auto choke? Could that be contributing?
Reply With Quote
  #5  
Old 02-14-2006, 08:12 PM
Senior Member
 
Join Date: Sep 2005
Posts: 1,446
Default RE: 626 fuel consumption

If the car is fuel injected, which it should be, it does not have any kind of a choke setup. The fuel mixture is controlled by the injectors. Another possibility is the coolant temp sensor. There is a seperate temp sensor for the cooling fan and one for the engine computer. If the PCM sensor is faulty the engine will run full rich. It would be best to have the car scanned.
Reply With Quote
  #6  
Old 02-14-2006, 09:11 PM
Thread Starter
 
Join Date: Feb 2006
Posts: 3
Default RE: 626 fuel consumption

The car definitely has a carb, not injectors. Will stick it on a computer manana.
Reply With Quote
  #7  
Old 02-14-2006, 10:53 PM
Senior Member
 
Join Date: Sep 2005
Posts: 1,446
Default RE: 626 fuel consumption

This must not be a US model car. Since it has a carb, I would not be that familiar with this system.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Really poor fuel consumption Spetz Mazda3 10 02-16-2009 05:17 AM
2003 Tribute High Fuel Consumption wimalhapu1 Mazda Tribute 14 05-05-2007 09:19 AM
Help! Fuel consumption. serge Mazda Protege 0 04-02-2007 03:35 AM
Fuel consumption for Aussie tribute owners raven82 Mazda Tribute 0 12-06-2006 08:42 AM
check this out! excessive fuel consumption bigzoom Mazda Protege 4 05-26-2006 01:12 PM


Tags
3vze, odd, sound

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


Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 12:00 AM.


© 2018 MH Sub I, LLC dba Internet Brands
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.