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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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 Posted: Tue Sep 03, 2013 1:31 pm Post subject: Sluggish 73 FI Fastback |
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Here is what I am experiencing:
-Low idle
-Sputtering upon half throttle
-Low torque
-General Poor Performance
-In neutral has full Rev Range, in park...very limited rev range.
What I have done:
-Replaced Points and adjusted
-Added Rotella 15 w 40 oil
-Topped up ATF
- Looked for Air Leaks (havent found any obvious ones)
What I have found:
-"Holy" heat exchangers
- Oil Cooler seems "loose"
-Oil leak at the valve cover (next on the list)
Any ideas? Here is a video:
Link
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Mike Fisher
Samba Member
Joined: January 30, 2006
Posts: 18046
Location: Eugene, OR
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| Posted: Tue Sep 03, 2013 2:03 pm Post subject: |
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Fuel Pressure about 30 lbs.
Charging Voltage about 14 volts at 2500 rpm.
_________________
https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold
Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Tue Sep 03, 2013 2:07 pm Post subject: |
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I adjusted the fuel pressure to 30 last summer. Is this a common (annual) adjustment?
And will my Bentley explain how to check charging voltage? |
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 23034
Location: Northwest of Normal
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| Posted: Tue Sep 03, 2013 2:32 pm Post subject: |
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Fuel pressure 28PSI
Minimum charging voltage 14.1 volts
Make sure both distributor advances are working. Adjust timing/ idle to 850 RPM (950 for automatics) at OPERATING TEMP, vacuum line off the can and plugged. Idle can vary + or - 50 RPM.
If all that is right, you might try a throttle switch adjustment per Bentley and test your MPS.
_________________
Немає виправдання для війни! Я з Україною.
| Bryan67 wrote: |
| Just my hands. And a little lube. No tools. |
Those who can- do.
Those who can't? Subaru. |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Tue Sep 03, 2013 7:49 pm Post subject: |
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| Got it home from work tonight with a bit of a limp. Idle so low that the gen light flickered. It was extremely sluggish and would pick up if I floored it, let off, floored it, let off at about a 2 second interval! |
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KTPhil 
Samba Member
Joined: April 06, 2006
Posts: 35914
Location: Conejo Valley, CA
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| Posted: Wed Sep 04, 2013 2:13 pm Post subject: |
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| Look for vacuum leaks. |
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 23034
Location: Northwest of Normal
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| Posted: Wed Sep 04, 2013 2:18 pm Post subject: |
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| lowslowauto wrote: |
| Got it home from work tonight with a bit of a limp. Idle so low that the gen light flickered. It was extremely sluggish and would pick up if I floored it, let off, floored it, let off at about a 2 second interval! |
Have you checked and adjusted the timing and idle speed at operating temp as outlined above?
You can test and diagnose all you want but if the basic settings aren't right you'll do nothing but chase your tail.
Add to that point gap adjusted to 0,016"
_________________
Немає виправдання для війни! Я з Україною.
| Bryan67 wrote: |
| Just my hands. And a little lube. No tools. |
Those who can- do.
Those who can't? Subaru. |
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vlad01
Samba Member
Joined: October 27, 2010
Posts: 3069
Location: Australia
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| Posted: Wed Sep 04, 2013 4:32 pm Post subject: |
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| lowslowauto wrote: |
| Got it home from work tonight with a bit of a limp. Idle so low that the gen light flickered. It was extremely sluggish and would pick up if I floored it, let off, floored it, let off at about a 2 second interval! |
I had this on a carby squareback, can't quite remember but I think it was timing or ignition related? |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Thu Sep 05, 2013 4:50 pm Post subject: |
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Not starting today.
Battery voltage before start 12.4
While starting stays above 11.
Ideas? |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Thu Sep 05, 2013 6:15 pm Post subject: |
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| Checked timing, maybe off 1-2mm. Still not starting! Smelling fuel, hear the pump as usual. Tested spark at distributor w timing light, getting spark. Going to try at the plug now? |
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 23034
Location: Northwest of Normal
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| Posted: Thu Sep 05, 2013 6:30 pm Post subject: |
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| lowslowauto wrote: |
| Checked timing, maybe off 1-2mm. Still not starting! Smelling fuel, hear the pump as usual. Tested spark at distributor w timing light, getting spark. Going to try at the plug now? |
Flooded.
Clean the plugs and check the oil for gas fouling.
What kind of spark plugs?
_________________
Немає виправдання для війни! Я з Україною.
| Bryan67 wrote: |
| Just my hands. And a little lube. No tools. |
Those who can- do.
Those who can't? Subaru. |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Thu Sep 05, 2013 9:29 pm Post subject: |
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Sorry tram, ran out if light, will check tomorrow!
Did have a long crack in the line running from the injectors on the left across the block to the other. Is this a fuel line or air? Would this cause issues? |
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KTPhil
Samba Member
Joined: April 06, 2006
Posts: 35914
Location: Conejo Valley, CA
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| Posted: Fri Sep 06, 2013 8:05 am Post subject: |
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| lowslowauto wrote: |
| Did have a long crack in the line running from the injectors on the left across the block to the other. Is this a fuel line or air? Would this cause issues? |
Yes, it will cause this issue:
That is a pressurized fuel line! |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Fri Sep 06, 2013 9:07 am Post subject: |
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That is what I figured...EEEEEkkkk glad I took it apart and found that! I would assume this could be a cause of these issues?
This 6.5mm line needs to be an injection line for force correct? |
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Mike Fisher
Samba Member
Joined: January 30, 2006
Posts: 18046
Location: Eugene, OR
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| Posted: Fri Sep 06, 2013 9:26 am Post subject: |
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We use standard reinforced rubber 5/16" fuel hose. It is only 30+ pounds pressure.
_________________
https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold
Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Fri Sep 06, 2013 9:32 am Post subject: |
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| I am hoping I can get this at the Crappy Canadian Tire or Princess Auto |
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Mike Fisher
Samba Member
Joined: January 30, 2006
Posts: 18046
Location: Eugene, OR
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| Posted: Fri Sep 06, 2013 9:49 am Post subject: |
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I think it is 7mm originally. The old clamps don't fit on the 5/16" so you need about 30 little bigger clamps & 22 feet of hose to replace it all.
_________________
https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold
Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Fri Sep 06, 2013 10:38 am Post subject: |
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| Perfect, thanks Mike...I am going to pull the plugs and replace that thisevening, keeping my fingers crossed for it being the solution to my woes. |
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lowslowauto
Samba Member
Joined: October 01, 2008
Posts: 425
Location: Ontario, Canada
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| Posted: Fri Sep 06, 2013 12:25 pm Post subject: |
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Just checked with Canadian Tire and they sell it at 5.99/ft.
As for the air components, I may aswell swap it all now...I know there was a post with the total sizes, and length needed but cant find it. Anyone have an idea? |
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Mike Fisher
Samba Member
Joined: January 30, 2006
Posts: 18046
Location: Eugene, OR
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| Posted: Fri Sep 06, 2013 12:44 pm Post subject: |
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I only paid .99 cents/foot for fuel hose & .99 cents/hose clamp.
_________________
https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold
Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey |
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