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No surprise, my 7 is leaking, I think!

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FI Spyder
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Postby FI Spyder » 06 Jan 2012 15:08

On the FI Spider I use the 50 psi fuel hose which is good enough as the regulator is set for 34 lbs. and it is cheap enough for use on carb cars. The high pressure fuel hose (240 psi I believe) meant for direct injection applications I assume, is very expensive. I buy what is available from local auto parts store in bulk.



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DNK
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Postby DNK » 06 Jan 2012 15:17

Clay, the PDF didn't list any diameters

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busheytrader
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Postby busheytrader » 06 Jan 2012 16:21

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Hasbeen</i>

No it's not oil, although of course it does leak that, but fuel.
Any suggestions on another way a 7 can loose fuel? This one has me foxed.

Hasbeen 7 <hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

Are you using points on your 7? Mine used to gulp fuel and go terribly out of tune after they reached 4,500 miles. At best I used to get 22mpg on my suburban commute and 33mpg on a 70mph run. That's UK gallons.

Adam

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TR7 V8 DHC Jaguar Solent Blue. 9.35cr Range Rover V8, Holley 390cfm, JWR Dual Port, 214 Cam, Lumention, Tubular Manifolds, S/S Single Pipe Exh, 3.08 Rear, 200lb Spax & PolyBushes all round, Anti- Dive, Strut-Top Roller Bearings, Capri Vented Discs & Calipers, Braided Hoses, 4 Speed Rear Cylinders, Uprated Master Cylinder & Servo, AT 14" 5 Spokes or Maestro Turbo 15" Alloys, Cruise Lights, S/S Heater Pipes, Replacement Fuel Tank. No Door Stickers. Mine since July 1986, V8 from 1991 courtesy of S&S V8 conversion and big brake kits.

Hasbeen
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Postby Hasbeen » 07 Jan 2012 10:32

Thanks Adam, but no, electronic ignition & Iridium plugs.

The car is behaving as it has for 10 years, & running very nicely.

It's really got me stumped.

Hasbeen

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Postby Cobber » 07 Jan 2012 13:36

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Hasbeen</i>

Whast is it called Cobber? How & where do you buy it?

Hasbeen
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

Repco, Busons etc. all sell it, you need to ask for the EFI high pressure fuel hose in the diameter you want.
The trouble is with less carbied cars on the road these days, no one is bothering to offer quality fuel hose for them anymore, I guess the owners of old bangers wont pay for quality so that leaves the rest of us with the crap they will pay for. It all comes down to economy of scale. The EFI stuff does cost a fair bit more but at least it seems to last.

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Rodney Wells
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Postby Rodney Wells » 07 Jan 2012 21:05

I was just looking through the treads and found this.
So I thought i may share something with you.

My last experience just a few weeks ago The same thing happened to me.
For a while I thought i could smell petrol in my car from time to time.
and just as you did looking under the car i could see nothing.
As you know i have an injected engine and an aluminum fuel tank.
so there is a lot of pressure in the line.

About 6 weeks ago I was on an interstate drive. On my way home and I noticed my fuel was doping faster than it did on the way up. At first I thought am I just lead footing it a bit or is the ECU keeping the cold start injector on or something. I pulled over at a small town and looked under the car, looked under the bonnet I could see nothing. No sign of a leak, at one point thought I could smell petrol but it was so brief I shrugged it off.
So I kept going. 20 min later into the drive the fuel gauge was dropping fast very fast.
No joking this time. I was not sure I would make it to the next stop.
Pulled into the first fuel station I came across just in time.
Got out looked under the car and asked my wife to start the engine. OMG it looked like a water sprinkler under there. There was fuel spraying all over the under side of my car.
We where so lucky there was not a fire.

This is what I found one very short peace of fuel line coming out of the fuel pump to the filter had developed a small fracture from old age. You could see the rubber was perishing and the pressure in the line was pumping fuel out in a spray through the cracks.

I climbed under the car right there and removed it. Went to the engine bay found a peace of hose I could steal of another part of the motor and changed it to get home.

We where so lucky there was no fire the great TR7 god was looking after us that day.

Next day I decided to change all the fuel lines in the car . I was even more shocked that there was another one about to do the same thing.

So what I am saying is Change all your fuel lines now ASAP don’t even give it another thought.

that's my experience hope it helps.
best regards rod

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Jolyon39
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Postby Jolyon39 » 07 Jan 2012 21:22

My first TR7 did exactly the same with its fuel hoses...... previous owners had deferred maintenance I think.

What is the expected life of a fuel hose and how often should you replace them?

Jolyon


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Rodney Wells
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Postby Rodney Wells » 07 Jan 2012 21:39

Yes that what happened. I assumed they where ok from what the other owner said he did to the fuel system. How often should you change them?


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FI Spyder
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Postby FI Spyder » 08 Jan 2012 15:41

How long is a piece of string? How safe do you want to be? Original equipment last longer than most/generic rubber replacements. Also a function of amount of use (mileage and time). I would say ten years for original equipment and 5 to ten years on replacements (depending on quality of replacements) and you'll never be stuck on the side of the road. 30 years is too long as I and others have found. After 20 years you are driving on borrowed time.



- - - - TR7 Spider - - - - - - - - 1978 Spitfire - - - - - - 1976 Spitfire - - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra - - Yellow TCT
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