22r exhaust manifold glows red

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from my thread earlier:​
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Blkvoodoo said:
http://www.helmarparts.com/product_p/fb-200m-1.htm

your mixer should look like this without the throttle body attached

the port that the LP vapor line connects to, just below is the "load mixture" adjustment, ( CA100 is usually used on 2.2L-3.0L engines )

The fat head screw to the right is your idle mixture.

next question, your tank is full, right ? ( I see this A LEAST once a month )

how is the tank positioned ?

you are using a forklift tank, right ?
Click to expand...

you can see the mixture screw for load in that picture.... if you look in the vapor port, it is just a valve that allows fuel in.... You could be right at idle, but lean under load... that load screw only turns ~90*
 
which direction for rich? I'll pull mine tomorrow on my lunch break.

I messed around a little bit more tonight. I did a compression check on #1 after adding some oil in to the combustion chamber, and didnt notice a change in pressure. Shouldnt I have seen an increase in cylinder pressure with the oil in there. Does it signify that i have valve issues?
 
I did talk with Carey on this. He was just as stumped as I am. We agreed more timing and if that did work send the mixer back to him. I'm going to install a wide band o2 on t and see what the fuel to air ratio is. Same thing that he will do at his shop
 
I turned it to the richest setting, and no change something aint right with this mixer.

Also, I tested for a vacuum leak, and I did not detect one.
 
Update.. After a talk with Carey, he suggested I lean out the idle mixture as it was set way too rich. This helped alot. I went for a hot lap down the highway and back and its shittons better
 
Carey said to get the idle mixture to about 15:1. I wasnt able to do that, I had to back the screw out about 4 turns to get to low 14's at idle. too much more and the screw will come out.
 
I am no expert on what parts are being used for these conversion kits, so forgive me if I am talking out my ass.
Any chance you got the wrong propane tank (Vapor vs liquid style) or a partialy clogged/damaged pick up tube? I think it is the Vapor tanks that dont work well mounted straight up (or even laying down as they are supposed to be) if the locator pin slot in the handle not turned downwards. The angled pick up wont get the fuel. (At least not on forklifts). Propane makes 25 percent less btu's than gasoline, so if it is mixture, it is really out of wack at hiway speed. Besides those wild guesses, timing and/or mixture is all I have ever seen cause the glowing issue. I am curious to hear what the issue is for education's sake.
:popcorn:
 
Im pretty sure John is running forklift tanks, which are liquid feed. From my experience you can run them in about any orientaion, but you may not get all the fuel to the pickup when it runs out.

It sounds like it was a mixture issue, but being on the rich side... maybe slightly unburnt fuel was getting into the exhaust causing it to glow? Was your "cruising" mixture above at no/low throttle at speed, or like a 1/2, 3/4 throttle speed?
 
forklift tanks that had been re-certified. this was the first use of these tanks since.

Too much fuel was carey's theory as well.

I'd say i was somewhere around 1/4 throttle, I driving around my neighborhood going about 30mph or so.
 
ordered a new mixer and a new diaphram monday morning. It should be here tuesday. I'll tune it see what happens.


I had a backfire on the intake side at the go topless event here. Ran great getting there, but it took a long time to start in the am. then a the bar, another long time to start and it backfired. I suspect the mixer was slightly damaged from the first backfire. So new mixer, an a diaphram just in case shit happens.
 
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