Fuel Issue?

[ads288]

Hi All,

I've replaced my fuel line using a kit from brick parts on ebay:

http://www.ebay.co.uk/itm/151821778721" onclick="window.open(this.href);return false;

I figured it would be a straight forward job to do the replacement - but couple of issues.

My old line didn't have a hardline - just a rubber pipe all the way from filter to pump.

I also didn't notice the small gold pieces of metal in the picture on ebay. Im guessing these are to help when clamping down the hardline? Are they essential?

Also, please could someone let me know if I've made an ultimate school boy error and got the fuel filter round the wrong way. If you look at the picture on ebay listing - the longer pipe of the fuel filter I've connected to the tank. The smaller pipe to the hardline. Correct?

Van Idles fine - but as soon as I go above 15mph I get pops , bangs and stall at most gear changes. Got about few miles down the road (probably when the choke came off) before this happened. Horrible limp home in first gear followed. Sound like fuel starvation?

As I've changed the fuel line - I suspect this is the issue. I get a good flow of fuel from the electric pump - but I've no idea how much is needed. To make matters worse it a weber carb thats running a little too rich.



Thanks in advance for any help!

[Ian and Lins]

These vans seem to be very sensitive to any issue of air being able to get into the fuel line system. I've just had a similar problem and a major part of the cure was to replace a cracked/porous fuel hose that went from the mechanical fuel pump to the carb (it was only about a year old!). make sure all connections are good and there is no chance of air getting in.
How's Lowie? Ages since we've been there.

[ads288]

Hi Thanks for the reply.

I've replaced the whole fuel line from: tank to filter, filer to pump , pump to carb. I'll check for air leaks just to make sure. Any other ideas welcomed.

Lowestoft not doing to bad - traffic problems are to be the main problem. Probably just like most places. Still waiting for a 3rd bridge to help on this front.

Thanks

Ads

[CovKid]

Depends when everything was fitted (ie in what order). I do know from experience that a weak float valve in front of a perky electric pump can cause flooding. Had to replace valve on mine even though it was fine on a mechanical pump. Does it stink of fuel in engine bay after you conk out?

[kevtherev]

If it was OK before you changed the lines then that's where your problems lie.
Or maybe you disturbed some rubbish that's got to the idle jet and blocked it

[ads288]

Thanks for the reply.

Covkid , it doesn't smell of fuel. Is there any other way to check for flooding?

Kev, would seem to be a possibility. Thanks. I'll throw some carb cleaner down and see if that helps. Taking a carb apart is a little scary.

Ads

[CovKid]

As Kev says, a good clean of the carb may do it.

[kevtherev]

Carb cleaner won't clear blocked jets are get rid of debris in the float bowl imho, it's only three screws to get in there.

[Ian and Lins]

Carb cleaner won't clear blocked jets are get rid of debris in the float bowl imho, it's only three screws to get in there.

That's what I thought about my first wife; getting out was difficult and much more expensive.

[300CE]

Hi Ads, had the same kind of issue although not as bad as your symptoms - it would cut out once or twice & I had a couple of backfires. I'm also running a weber and my issue was a mixture of a cracked fuel hose from the pump to carb and the vacuum advance (carb's fine).

I've replaced both and also adjusted the mixture on the carb - with the engine up to temp turn the screw inwards (clockwise) until you feel the tickover drop then turn the screw back out (anti clockwise) until the revs pick up & then a quarter turn back in. There's been no cutting out since although I will be checking the timing soon shortly just to make sure all is well here.

As an aside, when were the plugs last changed?

[ads288]

Hi all ,

thanks for the posts. I've had another look today and taken the carb apart a little:






Are the idle jet(s) the small brass things in the middle?

300, thanks for advice re: mixture. Im tempted to give it a change as I think it has previously been running a little rich. I've replaced all the feed in fuel pipes , vac hose to dizzy and HT leads/plugs this year. Nice to know someone else is running a weber!

Ads

[kevtherev]

They are air jets
The fuel jets are in the float bowl
You cannot accurately adjust the mixture without a gas anyliser

[CovKid]

Undo the fuel inlet hose and use a self tapping screw to genty remove the nylon cone filter. Ensure that is clean/clear first. When you fitted fuel line, was the small hose from cab to distributor a good fit? If vacuum is not working, timing won't advance and create a very bad flat spot on acceleration (15mph sounds about typical).

[300CE]

As Ralph says, fuel hose has to be a real snug fit. I've got 5.6mm hose from pump to carb and it's real tight around the nozzles.

Might be in a minority but I think the weber is a fantastic carb and works great. As Kev says, ideally needs to be put on an analyser to get perfect results - do you know what the co2 levels were at the MOT?

[ads288]

Hi Thanks again for all the comments.

Regarding the vac hose from carb to dizzy - thats a snug fit. Previously I could hear the engine change revs when I would disconnect it. So i think that parts ok. I'll dig out the recent MOT test and post the levels.

I've checked the small fuel filter inside the carb near where the fuel line enters. Was clean.

On my most recent test the van wont idle well , it starts for a minute or so and then dies. However if I keep the accelearator pushed down half way or more it will run without stopping.

I will try and clear out the fuel jets in the float bowl - does anyone have any tips?