weber hesitation

[twobone]

Hi

 

One of my two webers sounds a bit gargully this morning and the car is hesitating in the mid range

 

Am I best to use the "low speed idle" adjustment techniue to try to adjust the one (of two) carbs back into

[twobone]

Tune

[bball7754]

No weber expert (see other posts) but you might want to make sure the carb's are in synch first. I'm not sure that adjusting the idle valve will help in the mid-range. Believe the circuit the adjustable idle valve/idle adjustment screw is on should only affect the idle and a bit of the transition into the mid-range circuit.

 

Steve

[nleroux7]

I had trouble with one of my carb when I bought my car. Found out it was a sticky needle valve! But your problem might be completly different..

[lancylad]

Hi twobone. Try this site for info. Dontknow how to link this for you so you will have to google it. Performancecarbkits.com on their main page about third down on the left is tuning spec box, click on that and they have a huge amount of freee info on Webers. really helped me out with mine. I had the same problem as you, takes a bit of fiddling around, but well worth the learning curve. Good luck.

[twobone]

I used a number of different site suggestions to diagnose the rough running. A tweak of the carb balance made a huge difference. I think I will invest in a carb sync guage to get it even more accurate than my ear.

 

One item that I think will take more work is a strange sound coming from the very front barrel of the forward Weber. Its a loud slirping/sucking "thwacka-thwacka-thwacka" sound. Anyone had a weber with this? I wonder if this is also a sticky needle? I imagine the sound as some kind of imbalance in the vacuum-fuel delvery process.

 

Any ideas? The other barrels have a much quieter ticking sound.

[Ian7]

from a guy (me!) also battling weber issues, anyone want to start (or point to) a thread on affordable conversion of Kents to F.I. (if possible) ?

thx

[TheDingo8MyBaby]

Check out the yahoo group "side draft central"

 

It's run by a guy named keith who has developed "hypo-jets" for DCOE. Most people have been ranting and raving about them.

 

Do you have an aldon distributor? Most of the guys on blatchat have had good results sending their aldon distributors back to aldon to be re-springed for the proper advance.

 

In the mean time, check float heights, check cleanliness of needles and buy a sync tool and even a colortune. You also may want to check the plugs.

[khamai]

Check out the yahoo group "side draft central"

 

It's run by a guy named keith who has developed "hypo-jets" for DCOE. Most people have been ranting and raving about them.

 

+1

Keith's work with the DCOE has elevated the performance of the DCOE to a new level!

 

Cheers,

Kiyoshi

[Kitcat]

Anyone have a photo/diagram of the valve or screw that one uses to adjust the balance of the Weber carbs? Or a link to such a photo/diagram? I have the balance meter, just need to know what to adjust.

 

On my LOG trip my engine started acting poorly, it wldn't rev cleanly and wldn't go past 5K. I tried the "Italian tuneup" with excellent results (ran the engine hard under load for 5 minutes-accelerating thru the rev range and held it as high as it wld go for a coupla seconds each time). It seemed to clear out whatever was gumming up the works.

 

Now I know why owners of these engines blip the throttle occasionally. I thot it was for effect, it turns out they were cleaning out any carb blockages.

[twobone]

There is a screw attached to where the cable links up to the carbs. It mechanically regulates the difference in relative throttle position. Send me a PM with your e.mail and I will forward a diagram.