ClubCalibra | fuel pressure loss

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Offline myles

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fuel pressure loss
« on: December 07, 2011, 10:50:06 AM »
hi to all, i have a c20xe red-top 16v as stock, no mods, recently i had a fuel leak from the joint just beside the servo, i removed old pipes, used origional unions on the fuel rails with hose clamps, had a fuel weap to start with and then realised the hose i was using was rubbish, i then changed the hose and used acetaline hose, which is very good as an and result. problem is this, just prior to this pipe change i had the leak by the servo as mentioned which is now cured, but my fuel pressure vanishes to nothing over a week of standing, i have put a new fuel filter just for safe sake as it was very old. so as a result when i crank it over now, it takes about 10 seconds to start as the pump is primind. once running its ok and is ok all day when re-starting, only when it sits for a day or 2 does it lose all pressure, i have also not been able to find this occasional furl smell that appears after i have made a journey, switch off, do my business, come back and start up, its only there for a few seconds. and cannot find any other leaks now. advice would be a help.
thanks guys

Online Butcher

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Re: fuel pressure loss
« Reply #1 on: December 07, 2011, 12:02:08 PM »
Loosing fuel prime when that car has been stood for a few days id say is normal, on first turn of the key the fuel pump should prime for a few seconds then stop, then when you crank the car over the pump should run until stopped again.

You could be loosing a bit of prime/pressure through the fuel tank top plate, common problem on calibras is this plate to corrode and weep or squirrel fuel out depending on how bad it is.

I found mine like this. One pipe had fallen off
 

And other had pin holes in it
 

This was leaking fuel but evaporating before it got to the floor so i couldn't find the leak.

I did I repair thread on here. Worth checking but means dropping the tank as it's on top.

Offline tiff_lee

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Re: fuel pressure loss
« Reply #2 on: December 08, 2011, 19:15:40 PM »
Given the state of the rest of my car underneath prior to clean up i'm dreading what the fuel tank top looks like on mine.

Offline tiff_lee

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Re: fuel pressure loss
« Reply #3 on: December 08, 2011, 19:44:20 PM »
Butcher how did you fix that sender lid or did you just bin and replace it?

Was thinking you could possible remove both rusted 90 degree bends and affix some new ones to the lid.

Offline Teejay

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Change is inevitable.....except from a f***ing vending machine!

Offline tiff_lee

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Re: fuel pressure loss
« Reply #5 on: December 08, 2011, 21:17:29 PM »
I saw that thread good guide and repair but someone says they have done it twice and it is temporary at best?  There is no mention as to why it is temporary but my guess would be the holed areas on the 90 deg bit start leaking where the petrol has eaten away at the chemical metal.

Looking above at butchers I see the entire 90 degree part is missing just leaving a plain hole I was thinking perhaps you could fit some new 90 degree fittings/unions with sealing washers.

Offline Teejay

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Re: fuel pressure loss
« Reply #6 on: December 08, 2011, 21:46:56 PM »
IMO Butcher's repair was more permanent as he replaced the tubes with new which he soldered in place.
Looked pretty permanent to me.

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Offline tiff_lee

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Re: fuel pressure loss
« Reply #7 on: December 08, 2011, 21:51:17 PM »
Oh only just seen that Teejay, yes I agree excellent repair and definitely the way i'll do it.  Replacing those original 90 degree bends is key I think.

Edit: Butcher is that just regular  plumbing solder that you use with a blowtorch?

Online Butcher

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Re: fuel pressure loss
« Reply #8 on: December 09, 2011, 06:22:47 AM »
Yes mate just plumbing solder and blow torch and so far so good and its been a while now. Just make sure you drill down a decent amount to push the new copper pipe in and tin the inside of the hole to get a good join.

And get rid of as much rust as possible before rust proofing.


 


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