Weber 32 Dgr And 4K

[Fu-Leng]

Hi all

 

I put a Weber 32 DGR on my 4K.

This weber is just like a DVG, with manual choke.

The jets it has:

main:120/105

idle:50/55

air corr: 170/135

 

When I try to start engine it revs high and dies, even with choke full closed.

 

Maybe I should change jets?

 

Does anyone knows the correct jets for a stock 4K?

 

Just to add the this weber came from a Suzuki Vitara.

 

BR

José Martins

Edited November 5, 2012 by Fu-Leng

[altezzaclub]

PM EvanG, he fitted one recently and did a lot of jet work.

 

However I'd say it should run with the jetting from a Vitara, even if it is not at its best. It sounds like you have some other problem occuring.

 

Take the carb off again and check the idle jet for dirt and squirt petrol through the idle circuit with a syringe.

[Evan G]

130 main. 140 sec

190 air corrections

 

should be a good baseline turn

[Fu-Leng]

Thanks everyone

 

I tried putting:

mains 120/120

air 170/170

idle 50/55

 

Then engine would not even start. weird.

Then I opened the carb again.

Changed back to default but same thing, it did not start.

 

So I changed again, this time to:

mains 120/140

air 170/165

idle 50/55

 

Hoping that engine started but nothing. this kept me thinking if I had spark, so I checked distributor and on TDC put it on the correct position (with cap outiside i checked when it sparked while rotating the distributor and put it just before spark).

Then I checked the plugs, and they where black as night, lol. This might be the problem, too rich on the carb, so I cleaned the spark plugs, put them back, leaned a bit the mixture and rotated the key. The engine started finally, and it kept around 2k rpm with choke closed. If I closed the choke it died after a few seconds. Because I did not have more time to be around the car yesterday I left it like that but now, I know why it died after the choke open - the idle speed screw was not correctly, so that will be the first ting I'll try when I get back to it.

I read about someplace that these webers like a lot of advance, how much is "a lot"? just a few degrees on the timing? I'll try next time.

[Clapped out]

If the engine wont idle under 2k, You may have a vacuum leak too. Advancing the timing may depend on what octane fuel you may have available to you, id bump it up to around 12 deg and see how you go,

 

cheers!

[Fu-Leng]

If the engine wont idle under 2k, You may have a vacuum leak too. Advancing the timing may depend on what octane fuel you may have available to you, id bump it up to around 12 deg and see how you go,

 

cheers!

 

I don't believe I have a vacuum leak. I have a vacuum gauge connected to the intake, and it is stable while I have the choke closed, so no leak.

I think the problem is really the idle screw, that I think it was fully pull out, so when I released the choke after a few seconds it would slow down the engine slowly until it dies. But because I did not remember that screw when I was with the car I did not try to check it. will do it maybe still today.

Now I need to but back the seats, put the breaking fluid on and try it out on the field - until now the car did not left the garage :)

[altezzaclub]

Mixture screw right in and then 1&1/2 turns out would be a good starting point, and idle screw to set whatever revs you want.

 

The theory is, you get it all warmed up then screw the mixture screw in and out 1/4 turn, & put it at the fastest setting. Then adjust the idle speed to what you want, and then screw the mixture in and out a 1/4 turn past where you had it and see if you still have the fastest idle. You keep doing it until you have the fastest idle mixture on the mixture screw and the actual speed is set by the idle speed screw.

 

Once you have it on the road properly you should try those different jets and sort out which ones give the best performance and fuel economy. Put it over a dyno and check the A/F ratio with each jet setup, or borrow an air/fuel mixture meter from a garage and go driving with it.