By kenche (64.175.33.128) on Sunday, October 14, 2001 - 06:18 pm:

I need help to adust the webber DGV downdraft carb on my cvcc civic. I know there is a mixture screw, a screw under which I don't know what, and the electric choke. Now I can't get me car started and I mess with the screw around because it was running rough before. How should I adjust it now? Please help because I need to get the car running again to go to school and work. Thank You

By Don (209.181.52.25) on Sunday, October 14, 2001 - 09:11 pm:

I the screw in the base is an idle mixture screw. The affects the mixture at idle, but wont keep the car from running. The choke is the same deal, three? screws and you turn the choke spring housing to make the choke come off faster or stay on longer. If your car will not start and run you have another problem that Carb adjustments will not fix.

By errol (64.12.102.48) on Sunday, October 14, 2001 - 09:52 pm:

First: check float level and adjust
Second: back off Idle screw so it isn't touching
Third: screw in your air mixture screw in all the way lightly (the one on a angle) and back it out about 2 turns. This is done with the choke fully open.
Fourth: Adjust air mixture screw in or out to find a 'good' idle (around 800rpm) and then use the Idle screw to get the Idle to what you want.

By kenche (64.175.34.234) on Sunday, October 14, 2001 - 10:49 pm:

Thanks for all of your help Don and errol. I will try to do it and hopefully it will work out fine because I help succefully crank the car start but once I don't step on any gas. The car will die by itself. I don't know why?

By errol (64.12.102.22) on Monday, October 15, 2001 - 10:56 pm:

(?) I cna't reed yur pots! Slow down and read them before you hit the 'post this messege' button!
I'd love to help, But it sounds like if you hit your gas peddle it stops. Is it flooding? or lean. Webbers are great carbs but you have to keep the gas 'clean' no garbage to get trapped anywhere. What's the pressure? when you look down the little breather area (see the jets?) is it getting covered with fuel? Check your plugs, are they sooty black or wet? I know it seems goofy but it has to be looked at

By kenche (64.175.32.46) on Tuesday, October 16, 2001 - 10:59 pm:

errol:
what I meant is I have to step on the gas pedal in order to keep the car run. Otherwise it will die by itself. Also I have fellow your step by setting the mixture screw all the way in and back out two turn. The idel screw by touching the throttle level and in for one turn. I also change some new plugs but after a many trials, it turn black again. Should I change the plugs again. Also I have took out all the plugs and let the car sit for a day. Thanks for your time! very appreciated!
Ken

By Don (209.181.52.52) on Wednesday, October 17, 2001 - 06:39 am:

Black plugs are a sign of a rich mixture. Your choke is opening right? If you stop the engine and with a flash light look down the venturi and you see fuel dripping you have a high float level most likely caused by a stuck needle and seat.

What did you do to your car? This may provide some info as to what has gone wrong. Start with every thing you have done since it was running normally.

Like I said in the previous post this is probably not something a simple adjustment will fix, you now have to enter the "diagnostic mode"

By errol (64.12.106.28) on Thursday, October 18, 2001 - 06:24 am:

It sounds like a float level problem. Take the air horn off (top of carb) and slide the little pin/shaft out that holds the floats on, take the floats in hand and shake them near your ear, can you hear/feel fuel splashing in them? If so get a new pair of floats (if brass ones they can be soldered) and while you have it out, replace the 'needle and seat' that the float moves up and down.

Clean the plugs again, and screw the "air mixture screw" in til it stops and out again to maybe one turn. (you justhave to play with it)

By kenche (64.175.34.71) on Thursday, October 18, 2001 - 07:37 pm:

errol and Don:
Finally I got my car running. But it runs very rough. I have to turn the idel screw all the way down or the most one turn loose to keep it running. Also I have try to screw in and out of the mixture screw but it seems like it wouldn't have any effect any all. Why?
Once again, Thanks for all of your help.

By Don (209.181.52.75) on Thursday, October 18, 2001 - 09:26 pm:

"What did you do to your car? This may provide some info as to what has gone wrong. Start with every thing you have done since it was running normally."
Tell me this info, and I may be able to help you.

Example last week a Toyota truck was towed into the shop the customer said he had just installed a rebuilt carb and it just needed "Adjusted" (I hate it when they say that). Well hours of Diagnostic time revealed. 1) That the valves were adjusted too tight holding two exhaust valves open.
2)The pcv hose had a ball bearing in it, but two other hoses were direct manifold vacuum ported into the air cleaner. 3) It had twelve quarts of oil in it! 4) The Hipo ignition module was hooked up back ward and some wires were not hooked up at all and the timing was set at 5 ATDC.
etc...etc. The customer had turned every nut, bolt, screw plus put on countless new parts on incorrectly in an attempt to fix his truck. If he would have told us what he did we could have found things much faster.

After I fixed all that I was able to adjust the carb .

This is a true example, they paid their 700 dollar bill yesterday.