..experience this lately?

I believe it is the first time I encountered this.

On last Sunday afternoon, we had a weather system that was from Alaska move through our area. Lots of snow, pretty cold and slight foggy conditions.

I was to commute once again back to Pullman for my job that evening. I did my routine check up on the truck before I left. I just so happened to remove the air filter to check my choke, and I later noticed it seemed as though there was a sheet-like of ice over the carb throat. I did'nt think much of it but kept it in my mind to maybe further investigate.

All is well, until I commute south 195. HORRIBLE road to drive in the winter! But thats not my point of this story. I get maybe 30-40 miles out and I notice my truck starts bogging down when I try to accelerate! Hmm...

So I'm in a pack of 30 or so cars traveling this 2 lane road in horrible freak weather conditions. This road cuts through farmland. So, ontop of all this crap, the wind is blowing a good 30 mph. I say I must have been going no more than 30-40 mph for over an hour.

So I finally get to a straight away and hit it to seperate myself in the pack of cars. I'm cruising along all is well for a while. I get back down to a slow speed again of 30-40. I cruise this for probably a half hour. As I did though, I notice that as I occasionally sped up, the truck would bogg down!

So I thought, air was too thin and too cold for my primary jet. Well, I open her full throttle, and she picks up! I kept doing this off and on to get down the road. I come to a slight hill and I accelerate. Well, no matter how hard I tried, it would just bog down. So I was forced to pull over! It would barely idle.

I thankfully had my other primary jet with me. It was thankfully the bigger jet. So, I change her out in the dark and tune the mix as best as possible. Well, it seems fine! WOoo! I thought I solved the problem!

On the way back home from Pullman, I was 20 or so miles out of Spokane. I run into dense fog that continued the whole way home. The drive was fine until I hit the fog. No more than 5 miles later cruising at 60mph. The truck bogs down on acceleration!

The jet certainly did not solve it!

The whole reason for this is because of "carb icing!"( ) I called up my local parts store and talked to the man who deals with Weber carbs.

He gave me a few options as to why it did what it did:
1. Carb icing
2. Watered down fuel
3. Too cold of air for the Weber

I have searched up, and the solutions for these problems are:

1. Install a carb heater
2. Add a bottle of heet
3. Carb heater

Apparently, the 32/36 Carbs have a problem with sucking in cold air. Which causes bogging, stumbling, stalling, poor acceleration. I did not ask him how to remedy this, though.

Before I made my way home as I drove like a grandma, I stop by Shmucks for some heet. Added a bottle and went on my way. Have'nt had a chance to see if it solved the problem.

Well, the little rant I post up here, I suppose I would like to hear some feedback.

Has any of you encountered the issue of Carb icing? Is there any way to remedy this?

I was thinking that the same stuff heet contains, I believe is also used to de-ice windows, no? So if I'm right, it should de-ice the carb. Only problem is, it probably is'nt going to help the butterflies and carb throat. The throttle plate won't freeze up atleast..

I also believe Mazda had a carb heater on the stock carb. It was a black adapter plate with a metal contact and a plug connected to the alt. This is the carb heater, right? Anyone use it, and how would you fit this for the Weber?

This issue is more common with planes and all, but it happened to me. If the carb heater from the stock carb cannot be used, does anyone have any ideas on a carb heater? Does Weber provide one and/or has anyone made one?

The Weber carbs will face this problem eventually and not much can supposedly be done. The problem is the fact that the adpter plates for the carb to the intake space the carb too far for the intake to heat the carb...

Okay, I just typed waaay too much, lol. If a solution or much concern is taken for this, I will be sure to post it in my Weber techie with credit to the one responsible for the solution!

As I am reading this I can't help but think about the stock air cleaner housing and how it could be used to help out in your situation. I have a Weber 32/36 but I don't have a stock air cleaner to try it out on.

First you would have to take off all that aluminum emissions crap off the stock air cleaner, and sheet metal it back in, then adapt the base to bolt onto the Weber. The hole point of this would be to change your setup from an open element air cleaner to a closed system. Now with a little additional sheet metal you can direct the intake air from around the exhaust manifold to the carb which should help warm it up (just like the stock setup, but a much better carb). Unfortunately it is not gonna look as slick as the open element air cleaner, but for winter purposes it should work.

Thats a good idea right there.

I had this happen to my stock carb after I had made a cold intake for my 2200. If I let the truck sit long enough the heat would soak back through the intake and thaw out the carb, but like immortal1 said if you could duct the heat off the exhaust manifold that would deffinately help on your weber.

Well, the stock air filter housing had a hole by the air inlet. From the hole, a tube attaches to the heat shield on the exhaust manifold. I assume that they did this to route some heat to the carb for this purpose and probably a quicker warm-up. Add that ontop of ther carb heater and the exhaust gasses that get cycled back into the carb from the exhaust manifold through the reeds, and I'm sure it aided in carb heating...

I happen to come across this quit some time ago and figure this would be my best bet instead of macgyvering the stock application.



From there, a filter would have to be attached, I'm sure and then somehow route it so it will suck in the heat from the exhaust manifold. Its just a rough idea...

I was also thinking about using the alt. PCV inlet they have to the air filter. Take some hose and route it to the exhaust side. Problem is somehow capturing the heat so it is sucked in by the carb and a switch of some sort to open and close it. You would have to restrict air flow to the filter as well so the air would get sucked in through the hose. It also would not be filtered..

Just some things I've thought of so far. Does anyone know if the heet would work?

^ Nice find on the redline site. Only problem would be to make a "box" around the aftermarket filter wherever to locate it, then duct it over to the exhaust area. Could definately be made to look better than the stock unit. I only suggested the stock unit for winter purposes as it is probably already available and is already setup for the warm air intake (sortof). On the intake side of the stock air filter housing is a vacuum actuated flapper valve that was connected to a bunch of other computer controlled junk. The easy setup would be to connect the flapper valve to a spare vacuum port on the webber.

Again, this would only be a winter setup.

The small opening in the base of the stock weber air cleaner probably would not supply enough warm air to accomplish what you need.

Ya know what would be real slick. Install the redline kit mentioned with the proper air filter. Then if you have ever seen the inside of a mass air flow sensor, install something like that inline and connect it to a 12v power source. Instead of being used to measure air temp, it would heat up and warm the incomming air flow.

Again, for most performance applications you want as much cold air as possible. But up north it's kinda the opposite. I have a few other ideas but it would involve machining aluminum and that probably would not be a cheap fix.

why dont u just get a factory carb heater plate,bolt it to the base of the Weber,install a cab switch so u can turn it on and off and use it when u need it.I have an extra one u can have for postage.BJ

Ya, I still kept all my stock stuff just in case I may have had to revert back to it for emissions. Lol, well that don't matter now. Theres no way I could!

This problem may only occur when I'm traveling the highway. Its the only time it has done it and its only recent. I don't think I ever ran into it before.

I will definitely check up on this little sensor trick..

In that article about icing, it talks about how it can even occur in hot weather.

Hey hoc, are you talking about the little black plastic piece that had a wire connected to the alt?

If thats it, I still have it. But I don't think theres any way to put it on with all the plates, no?

EDIT: I checked up on what you said, Immortal. I cant find any sensors on the net like that... Well it is more specificly called a, "hot wire mass airflow sensor." It has a wire or screen that gets hot to measure air mass.

I was thinking about putting it in the filter box, but it is'nt like a little snesor piece like I imagined it being. Maybe I could make up something that uses a filament or something of the sort and have a switch on it... LOL, or MAYBE I should just switch to FI!

Who drives their truck in the winter anyways? lol

*raises hand* Only thing I have to drive, lol. It does me good and is currently the only thing I trust to get me from A to B!

Except this whole issue...