If I'm running the wrong premix oil, could that cause my engine that to start and just foul out the plugs? Every time i start it from a dry start it would run. But if i decide to turn it off and start it again, it cokes and sounds like it is flooding.

I just want to double check my two stroke oil that i bought to premix. I bought some Bombardier Formula XP-S II. Is this the correct one? If not, what would be a correct premix oil.

To note "new clean and rebuild fuel injectors"

 

is it TC-W3 formula, how much are you running, and are you shutting it off when its cold right after starting?

 

I'm using a 1 oz to 1 gallon ratio. At first I started the engine for a few minutes, but turn off the car to get come fan and blow my exhaust flumes out of the garage because I just have a down pipe. When I try to start it again, it just cokes and sounds flooded.

 

Wow, made for Rotax engines, this **** costs up the ***!
I didn't see TC-W3 certification, but it's synth.
It sounds okay.
Check your plugs to see if it's fouling.


-Ted

 

Yeah I know cost me $39 for a gallon! Yeah, the plugs are fouled when I pulled them to check it. But why would it foul if i just decide to turn it off and start it again. I was thinking maybe leaky injectors, but that couldn't be because I just got them clean by RC.

 

About half a quart per tankful of gas?
Did it have this problem before you started to premix?


-Ted

 

It's easy enough to visually see if you're using too much premix (or not burning it all)- pull the plugs, if the threads are all oily & gunked up (not to mention the electrodes), too much premix is being used...

 

Well this is my first rx-7. I bought a shell and swapped in a s4 TII engine. I've decided to run premix after reading the post on the forums. So I don't really have anything to go off of.

WAYNE88N/A

I pulled the plugs and there was really bad build up on the plugs. I guess I'm running to much premix. Right now I have half a tank of 115 octane with 1 oz to 1 gallon ratio. If that is too much premix, what ratio should I be running. This is going to be a daily driver if that matters.

 

UH, YOU ARE RUNNING LEADED GAS IN THE CAR???

-Ted

 

Walmart Premix is $1.07/16oz and works fine. Nuff said.

115 octane... haha... lol,mmmmmmmm...

I think you need to add some diesel to even that **** out back to normal again. Infact... just **** in your tank, it will have about the same combustion properties as 115 octane.

.


EDIT: PICTS FOR PROOF

 

With the above said, it definetly ain't the 128:1 premix ratio that's your problem, lol...

 

Oh, sorry to miss lead you. The tank is isn't completely filled with 115 octane. I just added some in there to lean out my ratio oil ratio from before. There's only about a gallon in there. It shouldn't bee leaded, my friend said it was okay, he said that it wasn't leaded.

So when I empty the tank and use 91 octane with premix ratio of 1 oz to gallon, that should solve my starting problem?

 

what's wrong with LEADED gas....I was told out motors were ok with it......I used 110 octane before.

 

I think leaded gas will foul spark plugs as well as cats (if any) and o2 sensors for sure.

 

NEVER run leaded gasoline in your car. As a matter of fact, I don't think they even make any leaded fuel any more. It will destroy the catalytic converters. I'm not too sure how well it would do with the apex seals too. NEVER EVER run leaded fuel in somthing that was designed to use unleaded fuel. Spark plugs will get ruined too.

 

Leaded gas will kill spark plugs and O2 sensors.
110 is the highest "LL" (low lead) gas that I know of.
This means 115 is full-on leaded race fuel.
Even LL stuff is not good for your spark plugs or O2 sensors for any sustained (more than one 1/4-miles drag pass) amount of engine running time.

It's the 115, even diluted, that's killing your spark plugs.


-Ted