Someone to do a dual-carb balance and tune up?

jordank · Joined: 03 Apr 2008 Posts: 43 Location: Coeur d'Alene, ID

I need a mechanic to help with a tune-up of my 1600 dual-carb. The carbs look to be Solex.

http://www.rcvwclub.org/phpBB2/album_pic.php?pic_id=130

It currently runs fine, good power, idles perfectly, and the timing seems to be spot on, but I am getting a few exhaust backfires when down-shifting, so I suspect it's running a little lean (a tune or larger jets needed?), or the carbs are not balanced.

anyone that can have a look at the carbs for me, or anyone you would recommend?

thanks,
jordan

jengel451 · Posted: Tue May 13, 2008 11:25 am Post subject:

if it's popping out the exhaust when decelerating, or between shifts, it may be an exhaust leak.

Balance issues will sometimes pop out the carb, or it will stumble badly when accelerating.

jordank · Joined: 03 Apr 2008 Posts: 43 Location: Coeur d'Alene, ID

yeah, it does have a bit of a flat spot on acceleration too... especially when not warmed up yet...

I'll check for exhaust leaks... I did change the exhaust on it, though it was backfiring even with the old exhaust...

jengel451 · Posted: Tue May 13, 2008 1:40 pm Post subject:

for grins, pull the plugs and take a look at the color of them. Report back!

BTW, just looked at your picture, I think you should rethink the fan belt install, I don't think the filter cover can take the revs like that! Wink

jordank · Joined: 03 Apr 2008 Posts: 43 Location: Coeur d'Alene, ID

RichM · Joined: 20 Jan 2008 Posts: 123 Location: Hayden, Idaho

I have the sync tool that you can borrow If youd like to try it yourself.

Rich

69 Jim · Joined: 02 Jun 2007 Posts: 13 Location: Nine Mile Falls

Give this page a look. I'm sure it will explain a lot.

http://www.lowbugget.com/main_page.html

mdmatt73 · Joined: 05 Apr 2008 Posts: 12 Location: Chewelah,WA

If all else fails, go and see Mike at Mitchels garage in Spokane,WA. Awsome mechanic. 509-483-1867 and tell him that Matt Russell sent you. I emailed Troy Hobbs in regards of a great and honest mechanic and he recommended him big time. Good luck!

grim reaper · Joined: 26 Mar 2007 Posts: 254 Location: Spokompton

Mike at Mitchels is a rad guy.I always feel like my vw's are in safe hands there.he is not my main mechanic because he is just a bit out of the way but I do like his service when i do get it.

jordank · Joined: 03 Apr 2008 Posts: 43 Location: Coeur d'Alene, ID

Still haven't gotten to pulling the plugs out yet Sad

- was busy installing my new oil pressure and oil temp gauges this weekend.

Drove around the CDA lake on saturday, the backfires still happening, mostly when down-gearing, with foot off the gas pedal... It also seems I now have a little oil leak off the front oil seal... frustrating...

I'll try to pull the plugs tonight, and if they look good and there is no other obvious explanation - I'll try to take it to Mitchels. Thanks for the recommendation.

mdmatt73 · Joined: 05 Apr 2008 Posts: 12 Location: Chewelah,WA

Hey no prob jordank. Hope things go well and you solve your problem. Best of luck. VW dubs forever

CustomVW · Posted: Tue Jun 03, 2008 5:58 am Post subject:

wait, backfiring when you let off the gas and decel? too rich, and has a small exhusat leak. the hot gas coming out is getting air from the leak and igniting.

I'd adjust your carbs, but it appears someone has walked away with my sycronometer, and I now have to wait three days for a new set. It really suck becuase I just built a 1915, and it's waiting to come to life.

jengel451 · Posted: Tue Jun 03, 2008 7:26 am Post subject:

I can swing by with my snail if you can round up 2 alternator woodruff keys. (I dropped them and they both turned into air when they hit the ground)

CustomVW · Posted: Tue Jun 03, 2008 8:58 pm Post subject:

I hate it when small pieces go missing.

CustomVW · Posted: Fri Jun 06, 2008 7:54 pm Post subject:

hey...big thanks Jim, I ordered another squirrel cage, so when it comes in, I'll prolly find my old one.