360 carby fuel supply

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 03 Nov 2020 11:17 pm

Yo! I've managed to get a 407 renix on the bay for £20!! It should have an advance of 15 degrees at idle and 24 degrees at 2500 rpm. The big issue with the 411 currently fitted is that the advance at idle is only around 11 degrees, although it appears less than 10 degrees with my timing light.

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How's about that then?

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I'll try it out tomorrow, assuming I get the car back from the MOT!
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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TasMan
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Re: 360 carby fuel supply

Post by TasMan » 04 Nov 2020 06:26 pm

Good result on the renix Jon, if I happen to find a 414 I will certainly let you know.
Nice tip on the syringes :)
Cheers Dave
1987 360 GLT

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SteveP
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Re: 360 carby fuel supply

Post by SteveP » 05 Nov 2020 03:21 pm

That's a lucky find!
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 12 Nov 2020 04:38 pm

Well after 3 years, I am back to square one. The car is having its MOT and has been stored for a week while a new exhaust part is delivered. On arrival of the part, the car refused to start. The fuel filter in the engine bay was empty and I could only start it by getting a can of petrol at 4am and syringing it into the carby. Titter ye not.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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SteveP
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Re: 360 carby fuel supply

Post by SteveP » 17 Nov 2020 03:54 pm

I had this issue in the summer with my GLS if left for a couple of weeks, the fuel was evaporating from the float chamber. There aren't any leaks and the hoses are all new so I'm not sure why. It's been years since I have had a carbed car so not sure if it's normal. The mechanical pump obviously can't suck stronly enough to bring fuel up from the tank, guess it could be solved with an electric pump if it persists.
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 18 Nov 2020 03:42 pm

Hello, it's very reassuring to hear you had the same problem. I went the leccy pump route but it only lasted 18 months in everyday use. OK for a go-kart, but not really for a car! However, having both (i.e. just using the leccy pump to start), is not impossible but seems a bit mad and would need an extra switch somewhere as well as tricky pipework? I am now wondering if it's the fuel filter in the tank (if there is one) restricting the suction on start-up. That is on my todo list. Mind you, we'll need a leccy motor by 2030 ;-0 Watch this space.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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SteveP
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Joined: 21 Sep 2004 12:45 pm
Location: Coventry, UK

Re: 360 carby fuel supply

Post by SteveP » 19 Nov 2020 01:43 pm

I've gone through the whole fuel system on mine while replacing the tank, so all flexible pipework is new, carb has new gaskets, there are no leaks from what I can see - so it's a bit annoying. Wonder if it's a modern fuel thing? The only filter in the tank is a gauze on the end of the sender unit's pickup pipe (be careful if you take it off the pickup as in my experience they go pretty brittle - don't twist them too much!).

I think if the float chamber/engine bay fuel filter runs dry the mechanical pump would never be able to pull fuel up that far, it seemed to be worse when the tank had less fuel in it, maybe that's a factor with yours?
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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bogbasic
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Re: 360 carby fuel supply

Post by bogbasic » 19 Nov 2020 04:32 pm

Hello, not definite but I also got the feeling it was related to fullness of the tank. I don't have the same problem on my blue 1.7. You can leave it for months and it will just start after a recharge. That one doesn't have a vapour separator, but my red 1.7 which does, had a sucking-back fuel issue last year. The garage cured it by fitting a non-return valve between the tank and the carbie. I was a bit cheesed off with it all (as per other thread) so I reverted to the original system. Time will tell if that was sensible, still most of their hose-clips were either cable ties or in the ether. Thanks for the tip, I'll be careful with the pick-up filter. Ta jc
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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bogbasic
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Joined: 21 Nov 2004 10:12 pm
Location: New Malden, Surrey.
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Re: 360 carby fuel supply

Post by bogbasic » 21 Nov 2020 12:09 am

These are the results of an experiment I did today a few hours after the car had started successfully.

Image

Anyone with BT broadband won't be able to see the figure because BT thinks its hosted at a scamming site, sorry!

There is deffo some sucking back to the tank, as the MACmeister recently confirmed was a normal effect, but we are finding that it seems to drain out of the carb too?? I am thinking that after being left for a few weeks the pump fails to send petrol to the carb because there is a vapour lock in the separator and/or the hose to the filter and carb due to ambient temperature cycling. When you repeatedly crank the engine to try to start it, I guess the fuel just gets sent back to the tank by the separator rather than going to the carb due to the vapour lock and that's why it never starts.

I am thinking of putting a non-return valve just below the fuel filter to try and stop this. Does that seem sensible?
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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bogbasic
Posts: 1532
Joined: 21 Nov 2004 10:12 pm
Location: New Malden, Surrey.
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Re: 360 carby fuel supply

Post by bogbasic » 22 Nov 2020 12:52 am

1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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SteveP
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Location: Coventry, UK

Re: 360 carby fuel supply

Post by SteveP » 22 Nov 2020 11:55 am

It'd certainly work, some old Peugeot diesels used to have them from the factory!!
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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bogbasic
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Joined: 21 Nov 2004 10:12 pm
Location: New Malden, Surrey.
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Re: 360 carby fuel supply

Post by bogbasic » 22 Nov 2020 09:02 pm

Coolio. I thought it would be a shame to have the mechanical pump sucking petrol through the rubber bulb all the time given that it has a hard enough job getting the system started as it is, so I came up with a bypass system. Does it look any use??

Image

Before I get too involved with Heath Robinson designs, it just crossed my mind that I could put a lawn mower-style fuel shut off valve in the pipe between the vapour separator and the tank. If the car refuses to start, shut the valve, crank the starter a few more times to get the full pressure of the pump into the carbie (maybe with the HT disconnected for safety), open the valve again and try to start it??
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

User avatar
bogbasic
Posts: 1532
Joined: 21 Nov 2004 10:12 pm
Location: New Malden, Surrey.
Contact:

Re: 360 carby fuel supply

Post by bogbasic » 23 Nov 2020 09:16 pm

Well, did a bit of a shopping trip to find a fuel-cock but failed. Still found a nice non-return valve which is now fitted.

Image

Image

I think I even got the arrows in the right direction, arf. Engine ran fine, so will leave alone till the end of the lockdown and see if it restarts, well that's the plan anyway.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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SteveP
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Posts: 7858
Joined: 21 Sep 2004 12:45 pm
Location: Coventry, UK

Re: 360 carby fuel supply

Post by SteveP » 24 Nov 2020 12:01 pm

Keep us posted, can't see why it wouldn't work!
1989 - Volvo 360 GLT
1985 - Volvo 360 GLS
2008 - Volvo S60 SE Lux

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