Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-20-2020, 01:31 AM   #1 (permalink)
EcoModding Lurker
 
Join Date: Nov 2016
Location: South Africa
Posts: 18

Aveo - '12 Chev Aveo LS
Thanks: 0
Thanked 1 Time in 1 Post
Fuel pump and carb vehicle questions

I have a Nissan 1400 ute, same platform as the Datsun 1200 UTE with the a14 carb engine.

My manual fuel pump packed up a few weeks ago and as a quick fix I added a low pressure electronic fuel pump, would the electronic fuel pump make it heavier on fuel or will the excess fuel just pump back into the tank via the return pipe?

Then another question, while idling at a traffic light, eg for 30 seconds or longer, I have judged more or less which lights on my route take how long before they change and most are 45 seconds or longer, would turning the engine off and restarting when the its time to go again help with fuel efficiency, the vehicle has no start up issues. Ive heard that a carburetor uses more fuel to start than to idle for a short period.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-20-2020, 08:39 AM   #2 (permalink)
Corporate imperialist
 
oil pan 4's Avatar
 
Join Date: Jul 2011
Location: NewMexico (USA)
Posts: 11,175

Sub - '84 Chevy Diesel Suburban C10
SUV
90 day: 19.5 mpg (US)

camaro - '85 Chevy Camaro Z28

Riot - '03 Kia Rio POS
Team Hyundai
90 day: 30.21 mpg (US)

Bug - '01 VW Beetle GLSturbo
90 day: 26.43 mpg (US)

Sub2500 - '86 GMC Suburban C2500
90 day: 11.95 mpg (US)

Snow flake - '11 Nissan Leaf SL
SUV
90 day: 141.63 mpg (US)
Thanks: 269
Thanked 3,522 Times in 2,796 Posts
The only way the fuel pump would dump more fuel into the engine is if it was set to a higher pressure than the last one and that fuel pressure can over power the needle valves held closes by the floats.

Do one better if you know the light is going to turn red, or as you come to a stop sigh turn the engine off before you stop.
I'm guessing you have a manual transmission?
It only uses more fuel on a cold start with the choke.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
  Reply With Quote
Old 02-21-2020, 03:52 AM   #3 (permalink)
EcoModding Lurker
 
Join Date: Nov 2016
Location: South Africa
Posts: 18

Aveo - '12 Chev Aveo LS
Thanks: 0
Thanked 1 Time in 1 Post
Yes its a manual and I give the coasting to a stop with the engine off a go. Don't think ive ever needed to use the choke to start it to be honest, maybe really cold winter days but generally has no issues starting up.

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com