Putting fuel in my 98 VT Roadster = ROYAL PAIN!

Is this a normal problem with the Diablo? Every time I try to put gas in the tank I literally have to

hold it barely (B A R E L Y ...) on to fill it otherwise the gas handle trips off. I have tried it with a good

seal to the rubber anti vapor ring to the car and then without any seal at all. It takes 20 minutes to gas

up a car that should take 3 minutes! WTF? Is there something wrong with the design of these machines

gas filler neck? Or am I doing something wrong?

 

Thanks

 

Mark

Is this a normal problem with the Diablo?

Yes

 

Varies a bit from pump to pump, some are impossible to use!

Yes

 

Varies a bit from pump to pump, some are impossible to use!

 

Has anyone figured out a fix? Maybe some sort of spout you could insert into the tank neck that would then fit to the gas nozzle?

 

More trouble than its worth probably...

 

Hear this is a common issue. Fortunately, I haven't had any problems with mine. It's the way the neck is angled...almost causing a kink.

Sometimes it happens for me and sometimes not. My DD also does it too though, so I think it's just hit or miss on which pumps you use.

What is the best handle angle ? I have found turning the fuel nozzle almost upside down works best (but still not good)

What is the best handle angle ? I have found turning the fuel nozzle almost upside down works best (but still not good)

Two things about this:

• I find holding the handle at about 7-8 o'clock as the best angle. This is in a system where holding the handle "normally" would be 6 o'clock, and 9 o'clock points directly to the rear of the vehicle.
• That said, I've heard of at least one Lambo owner claiming that cutting the fuel pipe (between the lid and the tank) by a quarter inch (0.25", as improbable as that seems) eliminates the problem entirely. It has to do with the vapor pressure, I believe.

Since I have the engine out, I'm going to trim my fuel pipe and report back on the results. In the meantime, I hope 7 to 8 o'clock helps.

Check out my post here:

 

http://www.lambopower.com/forum/index.php?...ing+up+with+gas

 

Also, FiveCar is correct, in that the 8 O'Clock position seems to work the best.

 

The filler neck "cut down" helped a lot!!!!!

If reducing the neck angle by cutting and stretching works, you guys should have one of the many custom silicone shops make you a redesigned filler neck with even further reduced angle. If this is really a problem with every Diablo I'm sure you could get enough of an opening purchase together to make it worth their while. Based on my experience with purchasing custom spec'd 4-ply silicone couplers from China in bulk this theoretical product could cost under $100 to retail.

 

 

What is the best handle angle ? I have found turning the fuel nozzle almost upside down works best (but still not good)

27.5 degrees.

Problem is, just about the time you find "the best angle" It won't be.

Ok, I took my fuel hose off last night but decided not to trim it because I don't think it'll help in my situation. The side of the hose nearer to the fuel door fits over a sleeve that's so long that the only flexible portion is about an inch or two between it and the gas tank -- I think that relatively short distance is the real problem. Trimming the hose won't allow it to bend any less, at least in my case. Part #36 below is essentially too long.

 

 

For those of you who trimmed your fuel hoses, was #36 much shorter? Mine seems to be around 4", which leaves it only an inch or two away from the top entry of the fuel tank.

Ok, I took my fuel hose off last night but decided not to trim it because I don't think it'll help in my situation. The side of the hose nearer to the fuel door fits over a sleeve that's so long that the only flexible portion is about an inch or two between it and the gas tank -- I think that relatively short distance is the real problem. Trimming the hose won't allow it to bend any less, at least in my case. Part #36 below is essentially too long.

 

 

For those of you who trimmed your fuel hoses, was #36 much shorter? Mine seems to be around 4", which leaves it only an inch or two away from the top entry of the fuel tank.

i have seen this subject before on here , i have no issues with filling, any angle and any rate

will have to look at the set up to see whats different

ps where can i get these assembly diagrams for my year '91 ?

 

 

i have seen this subject before on here , i have no issues with filling, any angle and any rate

will have to look at the set up to see whats different

ps where can i get these assembly diagrams for my year '91 ?

Thanks for taking a look, @RHennessey. Let me know what you find.

 

For parts diagrams, I believe the official party line is that you should own a parts manual. I don't actually own one. Instead, I use a Lambo parts site (which apparently I can't name on here because they might not be a sponsor); it rhymes with BremboStuff.com.