20R Expend gas as a 6 Cilynders, please help!

Starlux · 08-15-2008, 10:11 PM

I got a 4Runner 1987, it had a 22R-E before, so it broke and I bought a 20R carbureted engine. After setting up the engine I tryed two kinds of carburetors the OEM and the Weber 32/36, but it expend too much gas in both ways, more than the 22R-E, and it's have less HPs. I tryed few things for fix that, but still the same. Also I installed a gas regulator and a return hose to the tank. Is someone know how to resolve this issue, please help me how figure it out. My truck right now is not good in gas millage.

Thanks in advance, Starlux

superjoe83 · 08-15-2008, 10:22 PM

are you still using the original EFI pump in the tank?

Starlux · 08-16-2008, 10:07 AM

Yes, with a gas regulator and a return line to the tank.

superjoe83 · 08-16-2008, 10:18 AM

that could be part of the problem, even with a regulator you may be over fueling the carb causing bad gas mileage, do you have a pressure gauge after the regulator?

Starlux · 08-16-2008, 10:11 PM

No, I may have to get one. Right now the regulator is set on 4.5, but I'll be writting back when I get a gauge.

Thanks, Starlux

BB4X4 · 08-17-2008, 07:23 AM

I tried to use a low pressure regulator with a fuel injection pump and it blew the regulator. I'll bet you're getting way too much pressure to the carb

Starlux · 08-17-2008, 11:55 AM

In that case which full pump should I use? I know the one that the truck have is inside the tank.

Mr Priceless · 08-18-2008, 11:50 AM

you need a type i mechanical fuel pump for the carb. it mounts on the front passenger side of the head just ahead of the thermostat.

08-15-2008, 10:11 PM	#1 (permalink)
Starlux Registered User Join Date: Aug 2008 Posts: 4	20R Expend Gas As A 6 Cylinders, Please Help! I got a 4Runner 1987, it had a 22R-E before, so it broke and I bought a 20R carbureted engine. After setting up the engine I tryed two kinds of carburetors the OEM and the Weber 32/36, but it expend too much gas in both ways, more than the 22R-E, and it's have less HPs. I tryed few things for fix that, but still the same. Also I installed a gas regulator and a return hose to the tank. Is someone know how to resolve this issue, please help me how figure it out. My truck right now is not good in gas millage. Thanks in advance, Starlux Last edited by Starlux : 08-15-2008 at 10:15 PM.

08-15-2008, 10:22 PM	#2 (permalink)
superjoe83 Contributing Member Join Date: Feb 2004 Location: Oregon City, Oregon Posts: 1,872	are you still using the original EFI pump in the tank? __________________ - Joe 1984 SR5 4runner, 22re, 5-speed, chevy 63"s, rears up front custom pack, BBCS shocks, 2" BL, 5.29's, welded rear, Detroit in front, Longfields, IFS Rear, 39.5x13.50x15 IROK's, Marlin's High Steer, MC07 with stock cases, Marlin's cross member, tube bumper, Warn XD9000, Allied Beadlocks 1999 Taco 2.7 5-speed, LCE Header, Jardine 2.25 Cat-Back, 3" Downey Coilover, 33x13.5 Toyo MT's, ARB Bull Bar, Retrofitted Acura TL HID Projectors with 4300k Philips bulbs

08-16-2008, 10:18 AM	#4 (permalink)
superjoe83 Contributing Member Join Date: Feb 2004 Location: Oregon City, Oregon Posts: 1,872	that could be part of the problem, even with a regulator you may be over fueling the carb causing bad gas mileage, do you have a pressure gauge after the regulator? __________________ - Joe 1984 SR5 4runner, 22re, 5-speed, chevy 63"s, rears up front custom pack, BBCS shocks, 2" BL, 5.29's, welded rear, Detroit in front, Longfields, IFS Rear, 39.5x13.50x15 IROK's, Marlin's High Steer, MC07 with stock cases, Marlin's cross member, tube bumper, Warn XD9000, Allied Beadlocks 1999 Taco 2.7 5-speed, LCE Header, Jardine 2.25 Cat-Back, 3" Downey Coilover, 33x13.5 Toyo MT's, ARB Bull Bar, Retrofitted Acura TL HID Projectors with 4300k Philips bulbs

08-18-2008, 11:50 AM	#8 (permalink)
Mr Priceless Registered User Join Date: Nov 2007 Posts: 55	you need a type i mechanical fuel pump for the carb. it mounts on the front passenger side of the head just ahead of the thermostat. Attached Thumbnails

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08-16-2008, 10:07 AM	#3 (permalink)
Starlux Registered User Join Date: Aug 2008 Posts: 4	Yes, with a gas regulator and a return line to the tank.

08-16-2008, 10:11 PM	#5 (permalink)
Starlux Registered User Join Date: Aug 2008 Posts: 4	No, I may have to get one. Right now the regulator is set on 4.5, but I'll be writting back when I get a gauge. Thanks, Starlux

08-17-2008, 07:23 AM	#6 (permalink)
BB4X4 Registered User Join Date: Dec 2007 Posts: 11	I tried to use a low pressure regulator with a fuel injection pump and it blew the regulator. I'll bet you're getting way too much pressure to the carb

08-17-2008, 11:55 AM	#7 (permalink)
Starlux Registered User Join Date: Aug 2008 Posts: 4	In that case which full pump should I use? I know the one that the truck have is inside the tank.

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