Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
I Need Help with L-Jet / AFC Fuel Injection Topic FAQ
Page: Previous  1, 2, 3 ... 16, 17, 18 ... 32, 33, 34  Next
Jump to:
Forum Index -> Bay Window Bus Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
SGKent Premium Member
Samba Member


Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
SGKent is offline 

PostPosted: Mon Jun 25, 2012 1:03 pm    Post subject: Reply with quote

tootype2crazy wrote:
Just a quick question: what should the normal vacuum be? I have a mighty vac with a gauge on it and would like to see if I'm pulling the correct vacuum. Also I would read this on the plenum, right?


yes at plenum - vacuum can vary with camshaft and valve gap but typically between 17 and 20 inches at idle.
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
MadFrankie
Samba Member


Joined: May 27, 2011
Posts: 19
Location: Bournemouth
MadFrankie is offline 

PostPosted: Mon Jun 25, 2012 3:27 pm    Post subject: Reply with quote

Hi guys,

Bit of an update from my problem a few pages ago.

I finally managed to get a second hand fuel pump so installed it this weekend. Connected it all up, got a mate to turn the ignition and it whirred into life and I could see the petrol sloshing around in the filter so I was happy that it was now working and the original one was definitely dead.

However, the engine turned gave a few pops but didn't catch. It's now back to pretty much the same problem, it turns but doesn't seem to catch.

So, I went back to my trusty VW FI troubleshooting guide and followed the steps again.

Ignition system - ok
Hoses - ok
Pressure on starting - yes thanks to the new pump
Voltage at connectors - yes
Temp sensor has resistance
Cold start ok and not leaking

Which leaves the intake air sensor or air flow monitor, (whatever you prefer to call it), checking resistance between terminals 6 and 9 gave the correct reading but I got absolutely nothing between 7 and 8.

The troubleshooter then had this pearl of advice 'replace sensor'.

Does anyone have any advice for a work around or way of tricking the sensor to prove it is that. Also, I've done a little check and it seems these are not very cheap. I'm now in two minds as to what to do...

Do I dare utter the word carbs, for the time and effort chasing my tail with my FI and adding up the wasted money on tax and insurance with a static bus I don't want to be but I am seriously thinking carbs may be the way to go so I can get out and enjoy the bus. Especially as I can pay for a new sensor only to find that something else is also wrong with the FI.

Ho hum
Back to top
View user's profile Send private message Classifieds Feedback
mikemiller
Samba Member


Joined: April 04, 2010
Posts: 97
Location: Kenosha, Wi
mikemiller is offline 

PostPosted: Mon Jun 25, 2012 3:44 pm    Post subject: Reply with quote

the double relay in the 76 2000cc f\i bus is that year specific? or is it the same bosh part on all the f\i
_________________
1976 2000cc single weber progressive carb

'' IF LIFE WERE EASY AND NOT SO FAST,
I WOULDN'T THINK ABOUT THE PAST!'' -phish-
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Randy in Maine
Samba Member


Joined: August 03, 2003
Posts: 34890
Location: The Beach
Randy in Maine is offline 

PostPosted: Mon Jun 25, 2012 3:59 pm    Post subject: Reply with quote

The 11 pin double relay is the same for all but the 13 pin 79CA model.

Other uses of this relay includes FI beetles and non-CA aircooled vanagons (and perhaps others).
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
tootype2crazy
Samba Member


Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
tootype2crazy is offline 

PostPosted: Mon Jun 25, 2012 4:00 pm    Post subject: Reply with quote

SGKent wrote:
yes at plenum - vacuum can vary with camshaft and valve gap but typically between 17 and 20 inches at idle.


Ok I tested the vacuum and I am pulling steady 12-14 inches @ 800 RPM. I suppose there is a leak somewhere that I can't find. I guess I'll get some starting fluid and start spraying.
_________________
air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
tootype2crazy
Samba Member


Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
tootype2crazy is offline 

PostPosted: Mon Jun 25, 2012 4:46 pm    Post subject: Reply with quote

I just found that when I disconnect the vacuum lines coming off the plenum and going to the pressure regulator and the decel valve and plug it, it cures the problem. That being said the vacuum with those being disconnected is only 12-14 inches. I sprayed all over with soapy water and didn't see any evidence of leaks.
_________________
air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
SGKent Premium Member
Samba Member


Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
SGKent is offline 

PostPosted: Mon Jun 25, 2012 4:58 pm    Post subject: Reply with quote

tootype2crazy wrote:
I just found that when I disconnect the vacuum lines coming off the plenum and going to the pressure regulator and the decel valve and plug it, it cures the problem. That being said the vacuum with those being disconnected is only 12-14 inches. I sprayed all over with soapy water and didn't see any evidence of leaks.


not all cams are created equal. Use a vacuum pump to see which is leaking vacuum.
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
tootype2crazy
Samba Member


Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
tootype2crazy is offline 

PostPosted: Mon Jun 25, 2012 5:15 pm    Post subject: Reply with quote

It is a hydraulic cam so it may not be too robust. I will go out and pump up the items now, hopefully I'm reaching a cure here soon!
_________________
air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
tootype2crazy
Samba Member


Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
tootype2crazy is offline 

PostPosted: Mon Jun 25, 2012 5:43 pm    Post subject: Reply with quote

Well I think I narrowed it down. The decel valve and the fuel pressure regulator both hold vacuum fine. The valve in the air cleaner for the fuel tank gases does not. When I took off the line and plugged it, it runs just great. It's amazing that such a small thing could make such a difference. I'm off to fix it now. Thanks for helping me think!
_________________
air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
tootype2crazy
Samba Member


Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
tootype2crazy is offline 

PostPosted: Mon Jun 25, 2012 7:22 pm    Post subject: Reply with quote

I got the EEC valve apart and the diaphragm has a huge crack in it around the edge. I tried Colin's fix, we will see if it holds. If it doesn't then i will delete the valve and run the gas vapor hose directly into the air cleaner. I understand its purpose was to reduce hydro carbons upon start up, and since I don't have to worry about emissions here in Missouri it is not a necessary item.
_________________
air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
busdaddy
Samba Member


Joined: February 12, 2004
Posts: 51057
Location: Surrey B.C. Canada, but thinking of Ukraine
busdaddy is offline 

PostPosted: Mon Jun 25, 2012 7:31 pm    Post subject: Reply with quote

tootype2crazy wrote:
I don't have to worry about emissions here in Missouri it is not a necessary item.

Just don't go plugging it up, the fuel tank needs that hose to breathe and vent, if the diapragm fix fails remove the diaphragm and spring, cap the small nipple and reconnect the big hose, run the advance directly to the distributor omitting the Tee.
_________________
Rust NEVER sleeps and stock never goes out of style.

Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!

Слава Україні!
Back to top
View user's profile Send private message Gallery Classifieds Feedback
tootype2crazy
Samba Member


Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
tootype2crazy is offline 

PostPosted: Mon Jun 25, 2012 8:00 pm    Post subject: Reply with quote

Actually I will probably remove the entire eec assembly and run the vapor hose directly through the left over hole. It's about the right size to just shove the hose right in. I would never just plug up the gas tank venting system, that would be silly!
_________________
air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Stuartzickefoose
Samba Post Whore


Joined: February 07, 2008
Posts: 10350
Location: SoCal for now...
Stuartzickefoose is offline 

PostPosted: Mon Jun 25, 2012 8:55 pm    Post subject: Reply with quote

anyone have a base setting solution for the AFM on a 78 FI? looking to get a base setting to go off before i get it tuned properly at the local VW shop.
_________________
Stuart Zickefoose

2011 Jetta Sportwagen TDi 6 speed manual

206-841-7324
[email protected]
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
airkooledchris
Samba Member


Joined: January 25, 2005
Posts: 2700

airkooledchris is offline 

PostPosted: Thu Jun 28, 2012 8:28 pm    Post subject: Reply with quote

Stuartzickefoose wrote:
anyone have a base setting solution for the AFM on a 78 FI? looking to get a base setting to go off before i get it tuned properly at the local VW shop.



just mark where it is right now. put a tiny bit of white paint or a dot of red nail polish on the silver slider and the black cog. you could later rotate them back to their current position if the re-tune doesn't work out.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
tootype2crazy
Samba Member


Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
tootype2crazy is offline 

PostPosted: Sun Jul 01, 2012 6:47 pm    Post subject: Reply with quote

I posted this in the forums for lack of help here.
_________________
air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's)


Last edited by tootype2crazy on Mon Jul 02, 2012 7:20 pm; edited 1 time in total
Back to top
View user's profile Send private message Gallery Classifieds Feedback
MadFrankie
Samba Member


Joined: May 27, 2011
Posts: 19
Location: Bournemouth
MadFrankie is offline 

PostPosted: Mon Jul 02, 2012 8:35 am    Post subject: Reply with quote

Update on my problems, it was the fuel pump and after a bit of tickling on the AFM that is now also fine.

So, at the moment we are working.

Thanks for all your helps, support and advice. I'll keep returning to the thread and see if I can pay it forward!
Back to top
View user's profile Send private message Classifieds Feedback
phoneguy
Samba Member


Joined: March 14, 2008
Posts: 187
Location: Long Island
phoneguy is offline 

PostPosted: Thu Jul 05, 2012 11:00 am    Post subject: Reply with quote

Anybody have a source for the cable clamp that goes on the throttle body, German Supply is out of stock and I can't seem to locate it anywhere else.
_________________
"When my ship comes in I'll be at the airport"


1971 Supervert
1977 Westfalia
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Amskeptic
Samba Member


Joined: October 18, 2002
Posts: 8568
Location: All Across The Country
Amskeptic is offline 

PostPosted: Thu Jul 05, 2012 11:21 am    Post subject: Reply with quote

phoneguy wrote:
Anybody have a source for the cable clamp that goes on the throttle body, German Supply is out of stock and I can't seem to locate it anywhere else.


Borrow a heater cable clamp in the meantime. Who needs heat today?
Colin99*InVegas
_________________
www.itinerant-air-cooled.com
Back to top
View user's profile Send private message Send e-mail Visit poster's website Facebook Instagram Gallery Classifieds Feedback
Randy in Maine
Samba Member


Joined: August 03, 2003
Posts: 34890
Location: The Beach
Randy in Maine is offline 

PostPosted: Thu Jul 05, 2012 11:58 am    Post subject: Reply with quote

Amskeptic wrote:
phoneguy wrote:
Anybody have a source for the cable clamp that goes on the throttle body, German Supply is out of stock and I can't seem to locate it anywhere else.


Borrow a heater cable clamp in the meantime. Who needs heat today?
Colin99*InVegas


Been here?

http://www.busdepot.com/311129777
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
phoneguy
Samba Member


Joined: March 14, 2008
Posts: 187
Location: Long Island
phoneguy is offline 

PostPosted: Thu Jul 05, 2012 1:02 pm    Post subject: Reply with quote

Yeah , that's the small one for a type 1 engine or heater box cable.
_________________
"When my ship comes in I'll be at the airport"


1971 Supervert
1977 Westfalia
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Bay Window Bus All times are Mountain Standard Time/Pacific Daylight Savings Time
Page: Previous  1, 2, 3 ... 16, 17, 18 ... 32, 33, 34  Next
Jump to:
Page 17 of 34

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2023, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB
Links to eBay or other vendor sites may be affiliate links where the site receives compensation.