Anyone had luck with fuel additives?

Question

I'm in california so smog checks are a little harder here. I had my 84 jimmy tested and although i passed emissions, i failed visual inspections because of an exposed wire, unplugged minor vaccuum tube, and my idle speed rpm was too high. i have all this fixed, but because of the vaccuum hose im afraid my emissions might go higher now that it's plugged in. I don't think it'd be TOO much, but i was nearing the limit for carbon monoxide. the guy doing the check said he didnt think the hose would make it go over when plugged back in, but there is that chance because it most likely will go up. I've tuned up recently, and I'm wondering about fuel additives as a just in case. I've heard conflicting opinions, some people swear by them, some people say they're complete BS. The only time I really noticed a difference was in my old car i used one especially for cleaning out dirty carburetors, which mine was, and there was a minor performance increase. Anyone have any actual good things to say?

Update:

what product do you use?

Update 2:

Oh i already fixed everything. I know the vaccuum line wan't going to something so insignificant as that, my rpm went down slightly when i plugged it back in. the smog tech said it could raise emissions.

Update 3:

Because if that line was leading to emissions equipment leading to tailpipe, then it wasn't letting the **** in that tube through the pipe, so it would increase slightly

Harry · Accepted Answer

OK, just remember the fact that the car passed the sniffer test.

A loose vacuum line could hook up to something as innocuous as your windshield washer reservoir, or to something important, like your EGR valve. You certainly won't mess up your engine's performance or cleanliness by reconnecting your line. 

Patch your exposed wire with some shrink tubing. Buy a Chilton manual and find the port the vacuum line hooks to, and retest. Don't forget to smile smugly when it passes.

 Insofar as fuel additive goes, most of them simply consist of fuel system cleaners. As long as your Jimmy is in good tune, it should pass.

SmogTips Support Center · Answer

The use of fuel additives, such as BLUE SKY Clean Air, can be very helpful in lowering emission levels. Fuel additives are generally poured into a vehicle's gas tank during fuel refilling and mixed with ordinary fuel. Their purpose is to clean carbon deposits with in your engine's intake and exhaust systems, allowing for both fuel and air to flow freely within its passages, thus lowering emission levels and improving overall engine performance. These products offer helpful solutions to various vehicle emission problems.

Nimbus · Answer

I use a fuel additive specificaly to get thru the emissions test, but best of all, take it for a hard fast drive just before the test

Kang · Answer

I used Greensky Fuel Conditioner as instructed but the van did not pass the emissions test.  So as far as helping passing the smog test is concerned, this product is a waste of money.

? · Answer

i does no longer upload something to the engine or oil except there's a concern. in case you haven't any longer have been given a concern do no longer attempt to restoration it. in case you % greater octane that's extra fee-effective to place it in on the pump.

Anonymous · Answer

try lucus fuel treat ment its great stuff cleans ur fuel system out fine

Tuna-San · Answer

The ones I tried didn't kill my engine, so you could say I was lucky.

Other than that, they didn't do anything for my car at all.

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Anyone had luck with fuel additives?

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