green

 

ok cool, thanks

 

alot of old school (late 70s and early 80s) bmw guys have the same trouble with their old mechanical fuel injection. the trick the bmw guys use is to dump a crap load of rubbing alcohol into the tank before they test. no idea what is does but it gets them passed

 

the alcohol burns very clean, you havent ever seen an alcohol fire?

anyways, Im not 100% on this but I think the alcohol needs high compression to operate well in a gasoline engine

 

no, they still have fuel in there, they just have a mixture that is very high, like 40/60 or 70/30. stock bmw engines are not high compression.


i don't think i have ever seen an alcohol fire

 

i have a question about testing the o2 senser, does it have to be a propane torch? or can it be a cutting torch?

its based on just heat right?


it burns white and pretty

that might be an idea though

 

Yea thats the idea behind E-85 fuel for cars, its a mixture between gasoline and Ethanol, the Ethanol is very clean burning, BUT it has a lower energy density than gasoline so yea E-85 is cheaper and cleaner, but your mpgs will go down significantly

burning alcohol looks almost like a white LED light to me, it is pretty cool, I have seen videos of an alcohol fire in a dragster, and it was nuts because you cant really see flames on the driver, so he is flailing around a la Ricky Bobby, and then you realize oh wait he is on fire

 

I've never heard of using rubbing alcohol, but my shop teacher always used methonal to pass smog. You can buy it anywhere as it is what "Heat" is made out of, the stuff marketed to take the water out of you gas tank. It comes in a yellow bottle at any parts store. I have used it with sucess using about a 80/20 mix gas/meth. Nor only does it burn cleaner, but the specific gravity of any alcohol is less than gasoline so you would need more of it to equal the air/fuel ratio of gasoline but your computer does not know that so it leans you out a little too. That should really help you if your running a little rich.

 

im going to test the o2 senser when i can, i should be able to use a cutting torch right?

im definitly going to put in a bottle of fuel treatment, do seafoam, new plugs, maybe new cap/rotor to

 

just plain-jane Champion copper plugs work the best in jeeps. there are quite a few guys on here that have tried some other brands, plug styles, and cores, and many keep coming back to Champion because they are relatively inexpensive, and seem to work the best. i'm one of those guys as well: i've tried Bosch platinum 4 plugs, and those sucked. I acquired a set of NKG plugs, those also sucked. went back to some Champion plugs, and it never had a problem since.

combine those new plugs with the obvious tune up parts (wires, rotor and cap, etc etc etc...) and a little SeaFoam, and you should be good. and never hurts to run a tank of 91 octane fuel through it either, being a cleaner fuel.

also, doesn't hurt to replace the fuel filter!

 

those bosch plugs do suck big time

but here is why
http://a768.ac-images.myspacecdn.com...c2da7136d7.jpg


look at the bosch on the right, see how narrow the electrode is, it can get fouled so easy, while the standard one on the left has the big thick electrode, those multi-pronged plugs are just a gimmick, in theory they are supposed to work nicely because electricity always takes the path of least resistance, but theory doesnt always translate to reality

 

heres another good pic


I need to find a picture of the platinum 2s that my uncle put in his chevy K1500, they were caked so bad, and after we switched it back to the delco platinum and picked up alot of power and mpgs

 

even in the first set of pics you posted, also, you see that the electrode is practically covered up by the ceramic: that absolutely kills its conductive capabilities. probably kills the power of the spark by at least 50%. combine that with the smaller electrode, you are reducing the power of the spark dramatically. now, if they had put a larger electrode in their plugs, then the 2 and 4 prong plugs would be dramatic.

 

ive always liked champions


can i use a cutting torch to test the o2 sensor or does it have to be a propane torch?

i ask because i know the cutting torch has carbon but if its just heat then it shouldnt matter

 

A cuting torch though adjustable I think be to hot and messy with all the carbon.....Just get a propane torch at wal mart for like $10 bucks