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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-06-2008, 10:27 AM   #1 (permalink)
EcoModding Lurker
 
Join Date: Oct 2008
Location: GA.
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
New Carb fears

Hi, just arrived today and already have some questions.

I have an 87' toyota pick-up which I haven't driven in almost 9 years. This truck was given to my uncle to drive while I was sick in 2000 and at that time, I could put in 10 gallons of gasoline and go right at 400 miles with no load. As far as I know the carburetor had never been tampered with and there is no device or system to increase mpg on the truck.

The truck I drive now is for pulling a 5000lb load around, my tractor/backhoe and the fuel prices are obviously killing me since I am one of the few who still charge a fair price for my services. I am going to repair the toyota for driving to town and such (we live in the sticks) and possibly (very likely) modify it.

One of the things that need to be done first is the carburetor either needs to be replaced or rebuilt and I am actually a little paranoid about replacing it. I no longer trust auto manufacturers, epa guidelines concerning fuel mixture regulations or anything govt'al really and I'm wondering if a replacement (as opposed to rebuilding it) would actually damage the vehicles efficiency.

At this point, I really don't have the money to play around with so whichever of these I do, I'll just have to live with for a while. Anyone have any thoughts on whether to replace or rebuild the carb? Anyone have any thoughts on why my 87' pickup got almost 40 mpg in 2000 but other, newer vehicles of the same weight don't?

If you view this as an unfounded fear, it's alright but if you have an opinion on the issue, please let me know.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-06-2008, 02:18 PM   #2 (permalink)
Master EcoModder
 
Join Date: Jun 2008
Location: Earth
Posts: 5,209
Thanks: 225
Thanked 808 Times in 592 Posts
Is your pickup a 2WD or 4WD? I have an '88 4WD that I use for hauling, but it has fuel injection, not a carb, and I don't see 40 mph unless the route's all downhill.

As for why changes in fuel economy in the 20 years since yours was build, look at wider tires, more frontal area, etc. Today's "small" Toyota pickup is a good bit bigger than ours.
  Reply With Quote
Old 10-06-2008, 02:32 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Oct 2008
Location: GA.
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by jamesqf View Post
Is your pickup a 2WD or 4WD? I have an '88 4WD that I use for hauling, but it has fuel injection, not a carb, and I don't see 40 mph unless the route's all downhill.

As for why changes in fuel economy in the 20 years since yours was build, look at wider tires, more frontal area, etc. Today's "small" Toyota pickup is a good bit bigger than ours.
It's 2WD manual shift. Not sure if they made an automatic. Just a plain old R22, no fuel injection... no air either.
  Reply With Quote
Old 10-06-2008, 04:36 PM   #4 (permalink)
Master EcoModder
 
Join Date: Jul 2008
Location: Silly-Con Valley
Posts: 1,417
Thanks: 173
Thanked 226 Times in 174 Posts
It's (relatively) lightweight, and pretty small so it has less frontal area than current new "small" trucks. It's also 2WD and a stick, unlike a whole lot of new vehicles.

Those are all good reasons that it gets (got) good FE. I'd say run it, and if it ain't right then fix it. If you're handy, you can try pulling the carb a little ways apart and cleaning everything you can. If that doesn't work, you're only out a few hours and a couple of cans of brake cleaner.

-soD
  Reply With Quote
Old 10-06-2008, 05:15 PM   #5 (permalink)
Master EcoModder
 
Join Date: Jun 2008
Location: NorCal
Posts: 451
Thanks: 1
Thanked 40 Times in 26 Posts
Quote:
Originally Posted by Blister View Post
Anyone have any thoughts on why my 87' pickup got almost 40 mpg...
For a good laugh, find a copy of the 1972 movie "Pete-N-Tilly" with Carol Burnette and Walter Matthau... I'm going off memory, i haven't seen this film since it was out in the theaters: There's a running gag where Walter Matthau and his youg son sneak into the neighbor's garage and add fuel to his gas tank about once per week. After doing this for some time, the reverse it, and siphon gas instead of add. The neighbor goes nuts, there's a scene with him at the local dealership argueing with the service manager about the once unbelivable FE, but now it's terrible. Funny stuff, but I'm not making fun of you in any way.

The 40mpg is puzzeling though, it seems your truck was getting way better FE than anyone would believe. If it still runs, I wouldn't touch it. I agree with you about carb rebuilders, it's real hard to find one that knows what he's doing these days (no one wants to pay the labor) If it was me, and I thought the carb needed rebuilding, I'd do it myself wit the aid of the factory repair manual (good deals on ebay for factory manuals... not to be confused with the $18 Haynes or Chilton's manuals)
  Reply With Quote
Old 10-07-2008, 02:33 PM   #6 (permalink)
Master EcoModder
 
roflwaffle's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 1,490

Camryaro - '92 Toyota Camry LE V6
90 day: 31.12 mpg (US)

Red - '00 Honda Insight

Prius - '05 Toyota Prius

3 - '18 Tesla Model 3
90 day: 152.47 mpg (US)
Thanks: 349
Thanked 120 Times in 79 Posts
If I can pull ~30mpg@55mph with a 3.43 rear end, all the emissions equipment (smog pump specifically) hooked up, and the motor never getting warm (someone took out the thermostat since the head gasket is probably funny), getting 40mpg out of a truck with a 3.07 final drive, smog stuff disabled, and the ability to warm up seems reasonable. Once you get it running, tossing in a 5speed trans along with aerodynamic mods should be able to get ya near 50mpg. Rebuilding the carb isn't too bad, but there are some parts (w/ little to no wear) you'll want to keep since some (not all) of the foreign stuff in the kit is crap compared to OEM.
  Reply With Quote
Old 10-07-2008, 03:48 PM   #7 (permalink)
EcoModding Lurker
 
Join Date: Oct 2008
Location: GA.
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Hey, thanks for the input guys. Some better ideas than paying the current prices on labor and materials is nice once and a while.

I appreciate it.

MM, that recap of the prank from that movie... well, I was thinking to myself that if you were caught putting the gas IN, you'd leave with no thanks and if you got caught taking the gas out, you may be shot. rofl. Lose, lose situation these days.
  Reply With Quote
Old 10-07-2008, 07:18 PM   #8 (permalink)
Master EcoModder
 
Join Date: Mar 2008
Location: southern, wv
Posts: 353

Johnny 5 - '81 Honda Cm400e
90 day: 42.86 mpg (US)

Da bike - '06 Honda Shadow Vlx deluxe
90 day: 59.47 mpg (US)
Thanks: 18
Thanked 8 Times in 5 Posts
have u tried lc engineering?
__________________
.
  Reply With Quote
Old 10-08-2008, 08:24 AM   #9 (permalink)
EcoModding Lurker
 
Join Date: Oct 2008
Location: GA.
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by taco View Post
have u tried lc engineering?
Not sure what that is.
  Reply With Quote
Old 10-08-2008, 01:07 PM   #10 (permalink)
Master EcoModder
 
Join Date: Aug 2008
Location: South Dakota
Posts: 460

WonderWagon - '94 Ford Escort LX
Last 3: 51.52 mpg (US)

DaBluOne - '99 Ford Escort SE
90 day: 48.97 mpg (US)

DaRedOne - '99 Ford Escort ZX2 Hot
Thanks: 0
Thanked 15 Times in 4 Posts
Quote:
Originally Posted by Blister View Post
Not sure what that is.
LCEngineering.com

__________________
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
DV - Carb & Ignition Eco-tuning Made Easy Daox DIY / How-to 4 09-09-2008 09:08 PM
scanguage for carb kermitthefrog Instrumentation 3 07-28-2008 08:00 PM
Myth Busters - HHO / Magnets / Carb 88CRX EcoModding Central 15 06-23-2008 11:03 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com