cinedub

Hi again! So finally i have found the problem, I think. I have installed a Bosch Mono Motronic Felicia injection system, since, but had troubles with it, so started to found out what's wrong with it. The manifold on the cylinder head side was curved. I haven't installed it back, but i'm sure it was leaking, even with a new gasket. It was absolutely not straight, but enough to run nice with the carb. Since i have installed an external AC, and changed the diameter of the fuel hoses, i'm not sure i will put the carb back on for a check, but as i have spent a lot of money on it, i think i will try it one day, just for fun. If anyone has issues like me, (car runs fine, only economy bad, check it out, and make it flat as you do the aftermarket carb-manifold gaskets! If this wasn't the problem, then idk Cheers!

I have used a bigger pair of scissors to cut a rectangle shaped piece from the big cardboard first. The cardboard is from a bigger notebook, with a hard cover.

Yes, i will post some in the evening.

I am from Hungary, and here everybody hates this carb :D. By the way, i have a Skoda120L with a favorit engine in it with the pierburg carb now, but I'm looking forward to buy a BMM injection system from a felicia, for a bargain. I don't have the choke installed on the pierburg, so the coldstarts are getting harder in the freeze nowadays. But until i have time to take it out from the felicia, and install the system to my car, I would really like to reduce the fuel consuption on the pierburg just a little bit, i would be happy with even 9L/100km.

...and close its hole on the intake manifold. No reaction to propane gas, around the base, if i suck the booster, it's not holdig the vacuum but no changes are noticable with closed hole.

On the video, the leak is in the brake booster. I am not sure, that mine is perfect, the hose is still the original one. I will try the propane gas torch at the bottom of the carb, and remove the brake booster hose for a while.

Yes, i have tried the smoke method, the smoke only came out at the top of the carb.

I made new gaskets from 2mm cardboard, and assembled everything with silicone gasket maker. I think, it's not fuel resistant, but it's the best i can get at the shops. I have used it for assembling engines, it has done it's job every time. I dont know, where the vacuum could get in, i dont have pdu, ttv, the plastic spacer and the metal thing has equal thickness, I have absolutely no idea, where the vacuum leak could be.

Hi again! So i think, i have finally found something related to my problem: Unfortunately i dont know, what causes this, but i think its not normal, as the idling fuel hole is at the bottom of the carb. This is the first stage of the carb, the second is dry, as it should be. I was told to check the accelerator pump, its new and i have also tried to change the little red thing inside it, with no luck. (just to add something to my previous reply, i got a brand new enrichment valve, it's much better, than the previous, and i have also resurfaced all the sealing parts at the bottom of the carb, made new gaskets, etc) Thanks for any help!

About a year ago, i have bought an aftermarket complete enrichment valve with the housing. I have looked inside it now, and compared the spring with the original one which i have taken off the carb. The spring is longer, and more stiff in the aftermarket one. I will upload a picture tomorrow. I will find out soon if the economy got better or not.

I have only replaced the spring in it, (in the blue field behind the red line) the valve was replaced a year ago, i don't understand, what's ruptured?

So, finally i had some time, i have checked the intake manifold for leaks, and there was no smoke coming from it. I have replaced the spring in the aftermarket part load enrichment valve /or whatever its called/, as in the original, the spring was much easier to press, and it was also smaller. Idle is smooth at 800rpm. Shall i check the power brake vacum tube? Brakes are fine anyways.

I can get a high power electronic cigarette with a big smoke, i will try it tomorrow.

So, I have disassembled and set the carb again, and checked everything, the engine still runs fine, but wont stops when i turn the mixture screw all the way in. the idle is set to 800 at 1,5turns on the mixture screw. It just lowers the idle, so it almost dies. How should i check for leaks, and where? I have assembled the intake manifold-carb gasket with some gasket sealant and with the included cardboard gaskets. The current fuel consuption is 10L /100km using the car for 15km distances. Thanks for any help in advance.

The gasket between the carb,and the intake manifold is brand new, and i set the carb as written in the manual. it works fine, but eats my head.