11 mpg on 92 4runner...
#1
11 mpg on 92 4runner...
Just bought a 92 4runner a few weeks ago and after 2 fills im getting about 11.3 mpg. Did some searching and found a few say that it's pretty normal but im pretty sure it should be closer to 20ish from what im told by friends and family who have owned similar vehicles.
No vacuum leaks that i could find. Tried some sea foam in the gas tank and the vacuum hose thing to clean out the system but have yet to find a smoking gun. Local mechanic said to check the mass airflow sensor but from what i just found on this site, the 92 doesnt have one, it has something different.
being 16 a near broke it's hard to afford 11 mpg. Any clues?
No vacuum leaks that i could find. Tried some sea foam in the gas tank and the vacuum hose thing to clean out the system but have yet to find a smoking gun. Local mechanic said to check the mass airflow sensor but from what i just found on this site, the 92 doesnt have one, it has something different.
being 16 a near broke it's hard to afford 11 mpg. Any clues?
#2
Registered User
is it stock? we need more information... 5 speed or auto? you'd be surprised how much a lighter foot can really improve MPgs
I get 13 mpg in my 4Runner.
I get 13 mpg in my 4Runner.
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#11
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O2 sensor has a pretty big effect on gas mileage. That's the first place I look. With that said, 13mpg is about what Toyota said it would get new.
I'd start by testing the O2 sensor and replace it with Denso/NGK if necessary. Also check plugs/wires, cap/rotor, air filter, etc. etc.. OEM sensors and ignition parts work best on these trucks.
Edit - forgot to put a x2 on timing. Most guys run 12-14 BTDC. Be sure to short E1-TE1 when checking and changing timing.
I'd start by testing the O2 sensor and replace it with Denso/NGK if necessary. Also check plugs/wires, cap/rotor, air filter, etc. etc.. OEM sensors and ignition parts work best on these trucks.
Edit - forgot to put a x2 on timing. Most guys run 12-14 BTDC. Be sure to short E1-TE1 when checking and changing timing.
Last edited by BMcEL; 02-03-2012 at 11:17 AM.
#12
All trucks are different. I get about 15-16 in my 92 pick-up. My brother gets about 14 with a new engine in his 90 4runner. I changed my fuel filter and lost an mpg Put a cold air intake on it and nothing changed. 3.0's aren't that great haha.
#13
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BMcEL is dead on I think...
O2 sensor will be your best bet I would think; good chance it's never been done! lifespan is around 75k or so on these for best performance. I went from 16 to 20mpg with just a new O2 sensor (just the pre-cat one btw), back down to 18 or so now. Go with Denso over anything else; URD sells 'em pretty reasonable but Amazon.com might do you good also.
and then of course there's alcohol injection... but you need to get closer than 11mpg before you try to 'fix' with alcohol/meth injection. (not that it will hurt)
test the VAFM, plugs/wires, etc... compression test, balance test, whatever you can. But I would bet money an O2 sensor will easily pick you up 2 or more mpg's, takes all of 20 min to replace, cost is around $75 maybe.
O2 sensor will be your best bet I would think; good chance it's never been done! lifespan is around 75k or so on these for best performance. I went from 16 to 20mpg with just a new O2 sensor (just the pre-cat one btw), back down to 18 or so now. Go with Denso over anything else; URD sells 'em pretty reasonable but Amazon.com might do you good also.
and then of course there's alcohol injection... but you need to get closer than 11mpg before you try to 'fix' with alcohol/meth injection. (not that it will hurt)
test the VAFM, plugs/wires, etc... compression test, balance test, whatever you can. But I would bet money an O2 sensor will easily pick you up 2 or more mpg's, takes all of 20 min to replace, cost is around $75 maybe.
#14
Registered User
im kinda on the same boat as he is being 17 and working at ups 11mpg isnt easy.. but wheni got the truck i was getting 225 from full tank now its around 170 for full tank replaced fuel pump/filter and air filter checked plugs they still got alot of life left..
ussauly half throttle other than up hills..
1993 p/u 3.0 5 speed extra cab 4.10 gears
ussauly half throttle other than up hills..
1993 p/u 3.0 5 speed extra cab 4.10 gears
#19
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the 4.10 aint that bad i had 4.30 but rearend went so i had to put my spear rearend in till i rebuild my 430s but town driving is hard with 410s but highway they are pretty nice being at 3 grand at 70 then 3600 at 70 with 430s
#20
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x3 on O2 sensor; biggest & most common of mpg killers. After that, vacuum leak. There are MILES of vacuum hose on the 3VZE. Check with an unlit propane gas torch while the engine is running; when you get near a leak, it will idle up slightly. It took me 2 years to find a hole underneath one of my VSV hoses...