Horible Fuel Economy

ajbsd · Samba Member Joined: May 08, 2004 Posts: 168

I thought I would bring this up here to see if anyone may have some answers or suggestions for my fuel economy problems. I'm running a new 1776 with a 110 cam, 8.1 commpression and dual 40 Kadrons in my 67 camper bus. When I first installed the engine it ran well enough but it was noticable that the carbs could use an adjustment or something. So I took them to the Kaddie shack for a service and they told me that the carbs required a full rebuild. So I let them proceed with the reubuild and reinstalled them along with a new SVDA distributor. I noticed increased performance however my fuel economy went in the tank! Before the rebuild I was getting 18 - 20 mpg but now I getting 11 - 12 mpg at best and that's if I drive conservatively! I thought maybe the SVDA had something to do with it so I put the 009 back on it and it is the same! But now I am experiencing other problems as well. Check it out;

1. Rough running / engine vibration – The engine runs rough with a noticeable vibration at low rpms however this goes away at higher rpms.
2. Idle / stalling issues – The engine stalls after idling for 20 to 30 seconds. This is a new problem with in the last week. I adjusted the idle a couple times to dial it in with the timing and all was fine but now it wants to stall.
3. Sputtering / coughing – The engine will sputter and cough at will!
4. Hot hard start – The engine will be difficult to start when hot.
5. Stinky - Smells like it's running real rich.

A 1776 is not such a big motor so why is my fuel economy so bad. And the other issues... Any sugguestions would be greatly appreciated.

Thanks for looking

camaroboi13 · Posted: Thu Jun 27, 2013 1:11 pm Post subject:

Dual 40s does seem like a little too much for a 1776 but if they're jetted correctly it shouldn't really be a problem. Can you find out jet sizing/venture sizing/any other pertinent information on those carbs?
_________________
69 bug 1600sp buckpack ceramic header w mondo muffler, riviera wheels, 185/65 front 205/70 rear, dual baby webers, big stereo in the works.
2001 Yukon Denali 6.0l AWD 24s TVs surround sound playstation 6 disc dvd etc etc.
2005 Nissan Maxima 3.5l stock mama's car

FFL GUN DEALER! PM ME FOR SOCAL TRANSFERS!

tattooed_pariah · Posted: Thu Jun 27, 2013 1:19 pm Post subject:

Randy in Maine · Posted: Thu Jun 27, 2013 1:42 pm Post subject:

I would call the Kaddie Shack and ask them about it.

rustybusjef · Posted: Thu Jun 27, 2013 3:03 pm Post subject:

Check for vacuum leaks and do a compression and/or leakdown test

ajbsd · Samba Member Joined: May 08, 2004 Posts: 168

OK, brough the bus to VW Paradise and they found that the idle jets were too big and replaced the .060 with .050 now it idles fine as well as adjusting the A/F mixture and linkage to work properly. It runs well at this point but the fuel economy is still bad, it's about 12-13 mpg and I think that is horrible! What do I check for next?

[email protected] · Posted: Wed Jul 24, 2013 3:22 pm Post subject:

what main jets? Your plugs are fouled, that's not helping. It will take a few miles for them to clean themselves.
_________________
It's just advice, do whatever you want with it!

Please do NOT send me Private Messages through the Samba PM System (I will not see them). Send me an e-mail to john at aircooled dot net

"Like" our Facebook page at
http://www.facebook.com/vwpartsaircoolednet
and get a 5% off code for use on one order for VW Parts ON OUR PARTS STORE WEBSITE, vwparts.aircooled.net


Hello! Log in or Register \| Help \| Donate \| Buy Shirts	See all banner ads \| Advertise on TheSamba.com

Forum Index -> Performance/Engines/Transmissions		Share:
		Print View

	Forum Index -> Performance/Engines/Transmissions	All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1