[Paul W]

Let's wait until the jury comes in....



Flash refrained before I put all my posts up! OMG! It's a first!!!!!!



;-)

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[flash]

lol - too funny

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[KRAG50]

Was that a steel punch you used, I'd be carefull using a steel punch with a steel hammer around a gas tank!

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[Peter B]

Nice work Paul. Good write up. The dialogue here has been great.

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[hot968]

I have the gas smell problem when I put more than 1/2 a tank of gas in car. This is an excellent reference to repair hope it makes it to the DIY forum so I can find it again.

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[Paul W]

So today I "filled it to the brim" with the best premium fuel I could buy, drove it like I stole it for 20 miles, and not a scent of fuel....I'm calling this one good.



Did I just jinx myself?

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[flash]

lol - only in as much as if you didn't change the hoses, they will now fail. that kind of crap happens to me way too often. that's why i do all of the "while you're in there" stuff every time i can

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[Peter B]

Paul - I hope this is a victory for you. The problem is consuming. It's hard to want to do anything else until the smell is gone.



I'll keep plugging away my 968's fuel smell issue. I think I need to replace at least the short little hose, for starters.

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[Rap]

Paul, do you do service work?

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[Paul W]

[quote name='Rap' timestamp='1379763384' post='149702']

Paul, do you do service work?

[/quote]



For the right price, I do anything! Carpentry, home remodel, car troubleshooting and repair, and can make a darn good home made pizza! But for the most part, I only do these things for myself. I have a day job.

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[jfrahm]

Sure, wiggle those hose barbs too and see if they are loose. Brimming the tank and parking in the sun is a good tip also.



I took another look at my delaminated hose since it was outside in the smelly rag bin (do not leave gas soaked rags indoors!) It's in surprisingly good shape once I cut off the delaminated part. I have seen hoses deteriorate on the inside, mostly in the bad old MTBE days but this one looks great. That is encouraging. I wont re-use it of course but compared to the front fuel hose on my supercharged 928 it's pristine. Your fuel and additives may cause more deterioration than mine apparently did however.



Sure, if I have the transmission out someday I will replace all the rubber lines back there but in the meantime I will sleep the sleep of the just.

That reminds me, I need to replace the 'fireball' line on the 928. S'mores roasted over a burning 928 taste funny.

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[MCL968]

Fellow 968 forum members, I am at my wit's end.



I have pulled all the trunk pieces out to expose the lines on my 92 cab, and I can't figure out how to get the input pipe (where the gas cap threads on) out of the fender.



I pressurized the tank to about 2 psi, and it leaked out in under a minute. There is no obvious leak anywhere I can see, and no dampness or staining either. The car has a very strong gas smell, regardless of the amount in the tank, and I fear I will soon be driving the most stylish of Molotov Cocktails.



Anyone out there had any luck pulling these fittings out? There has to be a trick, but thus far I have not been able to figure it out. I am not opposed to swapping out parts to make this problem go away, but I hate replacing parts at random. The threads seem to all be in agreement that these cars have gas fume issues, but they don't seem to agree on the most likely causes.



So, where should I look first?

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[Paul W]

When I was doing my research, I remember seeing a common problem with the cabs....will have to look at it again to see if I can find it....and I thought it was something with the filler neck.

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[Paul W]

[quote name='MCL968' timestamp='1384822210' post='152481']

Fellow 968 forum members, I am at my wit's end.



I have pulled all the trunk pieces out to expose the lines on my 92 cab, and I can't figure out how to get the input pipe (where the gas cap threads on) out of the fender.



I pressurized the tank to about 2 psi, and it leaked out in under a minute. There is no obvious leak anywhere I can see, and no dampness or staining either. The car has a very strong gas smell, regardless of the amount in the tank, and I fear I will soon be driving the most stylish of Molotov Cocktails.



Anyone out there had any luck pulling these fittings out? There has to be a trick, but thus far I have not been able to figure it out. I am not opposed to swapping out parts to make this problem go away, but I hate replacing parts at random. The threads seem to all be in agreement that these cars have gas fume issues, but they don't seem to agree on the most likely causes.



So, where should I look first?

[/quote]



I re-read your question, and I have to say, it was difficult getting the filler pipe out of the gas cap area. Here is the outline for the cab:







The first thing I did was to remove the piece of metal (semi-circle ring) at the gas cap filler, it's like a c-clip, needs to be pulled out (item 6). Then once that is out, I believe you can pull out the neck sleeve, item 7.



I might or might not had to remove the hose clamps and break the seal at the gas tank first, item 27. I know when I put it back in, I put the neck sleeve back in, then inserted the filler hose, item 11, into the sleeve at the top, then wrested in back over the tank neck. Then tightened the clamps down. Make sure it goes down around the gas tank neck 100%, the first time I did it, I only seated it about 60% of the way, then had the gas spill out when I filled it to test it!



Good luck, I have not seen the cab apart, if you want to post some pictures, I'm sure we could figure it out.

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[Peter B]

MCL - best advice I got on this topic was to "follow my nose". I've done a few standard procedures that have lead nowhere.



On my car, so far it hasn't been any one thing other than a number of loose hose clamps. As the rubber compresses, these fittings tend to seep / stink,

There are a few CAB specific topics on this website.

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[MCL968]

I am back in the hunt for the source of the gas smell.



So far I have checked out the lines in the trunk area, found nothing that appeared obviously leaking. I pulled the sending unit and replaced the gasket. Lines all looked great, all clamps present and tight.



When I removed the two lines from the sending unit, the larger of the lines was full of gas. I thought these were vapor recovery lines, and should not be filled with gas.



Am I mistaken, and if so, what does the larger of these lines being filled with gas indicate? Failed purge valve?



After the gasket replacement, the system still does not hold even minimal pressure for very long. There is clearly a leak, albeit a small one.



Any ideas?

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[Rap]

I have toiled with this problem to no avail. The car has been pulled apart and I ain't got no satisfaction. The only thing that works is only fill it up 3/4 full. Not a great solution but so far to shops , one really good can't seem to fix it!

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[flash]

rap - is it on the NA car or the SC car?

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[MCL968]

Even at 3/4 in hard cornering the smell is very noticeable. Seems to be worse when the hatches to the trunk are open, so I will assume the smell is coming from somewhere around the tank.



Tonight I am going to pull the bellows and inspect it very closely. Then, I will just start replacing lines and clamps. I hate replacing good parts, but this is ridiculous. Flash will not own a car that leaks, and I will not own one that reeks of gas, even one I love to drive and I waited years to buy.

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[flash]

agreed. this is going to be an increasing frequency of occurrence though. the rubber parts on this car are past their lifespan. we can expect to see this particular issue popping up more and more. we never heard of it until a couple of years ago. now all of a sudden there are a bunch of them.

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