which fuel for smog check?

toyNG · 10-01-2008, 11:08 AM

I have to get a smog check soon. I was wondering if I'd be better off using premium gas for the check? Also, should I have it done on a full tank or closer to empty?

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Alex 400 · 10-01-2008, 05:09 PM

Quote:

Originally Posted by toyNG

I have to get a smog check soon. I was wondering if I'd be better off using premium gas for the check? Also, should I have it done on a full tank or closer to empty?

my theory: just use regular gas, just make sure the engine is very warmed up, not just warmed up, but like driven around for a while. Seafoam is good for helping clear up emissions too. Next time you fill up, dump a can of seafoam in the tank. and run it through.

Jay351 · 10-03-2008, 12:35 PM

A few tips to passing smog tests:

Use a gas with an ethenol blend. In theory they burn cleaner.
run a can of seafoam through your gas tank and intake before hand.
Pump up your rear tires to 40psi
Drive the truck around for at least 20 mins before the test.

When im in the lineup to get mine done, I will usually sit with my rpms around 2000 to get everything nice and hot.

toyNG · 10-03-2008, 02:02 PM

I'm still a bit uneasy with the seafoam idea, because of the mixed results i've read on here. Maybe I'll try it if it doesn't pass the first time. The increased tire pressure is a good idea.

Kinked · 10-03-2008, 02:18 PM

x2 on what jay said. nice and hot with an ethenol fuel and you should be good to go

surf4runner · 10-03-2008, 02:27 PM

Quote:

Originally Posted by toyNG

Also, should I have it done on a full tank or closer to empty?

depends if your an optimist or a pessimist...

use the same octane youve been using...i usually just fill up w/chevron and go in when its ~1/2 tank (either full or empty-your call

)
to warm it up fully, a couple of full throttle runs is also beneficial

bigarms23 · 10-03-2008, 04:13 PM

87 octane and a full tank

10-03-2008, 12:35 PM	#3 (permalink)
Jay351 Contributing Member Join Date: Feb 2007 Location: maple ridge, British Columbia, Canada Posts: 8,630	A few tips to passing smog tests: Use a gas with an ethenol blend. In theory they burn cleaner. run a can of seafoam through your gas tank and intake before hand. Pump up your rear tires to 40psi Drive the truck around for at least 20 mins before the test. When im in the lineup to get mine done, I will usually sit with my rpms around 2000 to get everything nice and hot. __________________ 91 Pickup - xcab - 5sp - 3.0 - SR5 - 4x4 - 250k \|2.25" catback w/ magnaflow cat + glasspack \| Weasy2k cams \| Aisin manual hubs \| Diff breather mod\| Marlin HD clutch \|3" BL \| es3000's \|2" AAL \|1.5" bj spacers \| ISR \| Alpine headunit \| 4" Infinity fronts/5" rears \| 4.88's \|Rear lockright \| 33x12.50" BFG M/T on 15x8" steelies \|Hella 500's \|4" reverse lights\| Grant GT \|idler arm brace\|hella E-codes\| Marlin armor \|SS IFS brace \| %100 Amsoil synthetic http://www.cardomain.com/ride/2572486

10-03-2008, 02:02 PM	#4 (permalink)
toyNG Registered User Join Date: May 2008 Location: Redlands, CA Posts: 563	I'm still a bit uneasy with the seafoam idea, because of the mixed results i've read on here. Maybe I'll try it if it doesn't pass the first time. The increased tire pressure is a good idea. __________________ 1986 pickup 4x4 SR5, 5-spd, 33x10.5 BFG KM1 muds, 2" body lift, front and rear lockrights, 4.88s, 4.7 t-case with Dave'z twin stick, BudBuilt crossmember with 1" drivetrain lift, Downey grille guard and skid plate, TG sliders Still needed: rear bumper (Marlin, TG, or Dave'z)

10-03-2008, 02:18 PM	#5 (permalink)
Kinked Registered User Join Date: Apr 2008 Location: Coquitlam Posts: 99	x2 on what jay said. nice and hot with an ethenol fuel and you should be good to go __________________ 91 4Runner <- 3.0, Auto, Alpine IDA-X001 Head Unit, Alpine 4" Front Spkrs, Alpine 6X9 rear Spkrs 93 4Runner <- 3.0, Auto, Alpine Head Unit 92 S-10 Blazer <- Selling

10-03-2008, 04:13 PM	#7 (permalink)
bigarms23 Registered User Join Date: Oct 2007 Location: mountains of truckee ca Posts: 1,010	87 octane and a full tank __________________ 1988sr5 4.3v6 4runner with chevy axles 513 gears dual cases overall 300to1 ratio 36mtzs 5inch lift detroits 1972 stepside jimmy d44/d70 425hp 1995 green range rover

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