Opel Calibra again sorry

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Opel Calibra again sorry

Post by DARK STAR » Mon Apr 24, 2017 12:14 pm

I have the same problem on the boss's Calibra as I had on Dark Star once.
It won't start, apparently because there is no fuel flow.
In the past this has been because the worm clip holding the hose on the pressure regulator undoes itself (!) letting air into the line.
But this time removing and replacing the hose has not cured the problem.

So I presume it is the relay which is not activating the fuel pump.
From the Calibra Club forum I have found out where the relay is.
First step however is to hot wire the fuel pump to see if that cures it.
And the Calibra forum doesn't want to tell me where this is, although I have found out there are two versions, in tank and external :roll:
I've pushed the car into the garden to get the Coupé out, so it's a bit difficult to put it over the pit and I would like to jack up the correct side :wink:
As far as the relay is concerned, is it a standard item, because Opel want 35 euros for a replacement :shock:

Incidentally, there is a known problem on Calibras with porous petrol hose (which could also cause the symptoms)
but I think this is because most Calibras run on 95 octane with 10% ethanol.
I run all our cars on 98 octane which has zero ethanol so it shouldn't apply in this case (?)


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Re: Opel Calibra again sorry

Post by philhoward » Mon Apr 24, 2017 12:22 pm

Don't ask on the price of a fuel pump relay for the Porsche...

Have you got the Bosch/GM number of the relay? A quick google should them show which pins to short to prove/disprove the pump. Other way is a fuel rail pressure gauge (normally screws onto what looks like a tyre valve connection) or rather it does on my mid-90's GM engine :mrgreen:

On mine, the relay is a normal-ish 4 pin one (but 2 pins are larger than the other 2 - short those two out, especially if one is red and the other red/blue IIRC) but if it's Bosch LE-Jetronic then it may be one of the semi-intelligent ones (which are normally a lot more than 35 Euros.


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Re: Opel Calibra again sorry

Post by CNHSS1 » Mon Apr 24, 2017 12:51 pm

Calibra in UK was a 2 door Cavalier essentially (possibly called summat else by europe) so google that too may help as they were much more common


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Re: Opel Calibra again sorry

Post by philhoward » Mon Apr 24, 2017 12:53 pm

I think it was a Vectra A in Opel-land?


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Re: Opel Calibra again sorry

Post by scimjim » Mon Apr 24, 2017 2:39 pm

Is there an inertia switch?


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Re: Opel Calibra again sorry

Post by CNHSS1 » Mon Apr 24, 2017 4:38 pm

Was only the Cavaliers Jim, drivers inner wing area near bulkhead iirc.

Was tied into the central locking, not sure if Dark Stars car has any central locking issues as well?


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Re: Opel Calibra again sorry

Post by scimjim » Mon Apr 24, 2017 6:28 pm

Ok - as its a cavalier in a frilly skirt I thought it might. I once spent a day chasing a non starting fault on a Sierra which took ten seconds to fix once the owner told me he'd had a flat tyre the previous day :roll:


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Re: Opel Calibra again sorry

Post by DARK STAR » Mon Apr 24, 2017 6:32 pm

Central lurking? don't think so!

Thanks for all your contributions, but for once my previous analysis was correct, it just took more pressure than usual to shift the air.

I jacked up the right hand side of the car, 50/50 chance of success, and bingo, we have an external fuel pump just in front of the tank and towards the centre of the car.
I hot-wired it and the car started instantly, the pump having run for long enough to clear the line.

I put the normal wires back and turned the key - problem solved.

Do you think I could have porous fuel lines?
There is no sign of petrol on the exterior and the pipe looks shiny new when the road dirt is cleaned off.
Perhaps it is just the usual worm clip - of course I could change that ...


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Re: Opel Calibra again sorry

Post by DARK STAR » Sat May 13, 2017 8:30 pm

Thought I'd finalise this thread as it could apply to any injection-engined car.

A repete performance within a few days made me look again at the fuel line and I found a leak at one of the connections towards the rear of the car.
Close inspection showed that where the fuel line hooks up over the rear suspension everything is rusty (pipes and metal parts) or cracked (rubber bits).
Although there is no rot anywhere else, even above the suspension on the other side of the car - very strange.

Anyway, I bought a length of 8mm fuel hose and some decent clips and set about removing the old pipework.
Instead of a simple hose with clips at each end there were TWO simple hoses, one either end of a very complicated rusty steel pipe that wound its way over the suspension in the general direction of the fuel pump.
And four snap-on / fall-off hose clips.
And retaining clips that require a large, very short screwdriver.
Just for the feed line.

I was going to do the return line as well but the (different) complicated metal pipe disappears somewhere above the suspension - and then I found a third pipe which is nylon and ... disappears somewhere above the suspension.
So I gave up on that one until it (they) should start leaking.

Photos show before (well, mostly before, I started before I thought of taking pics) and after, plus the ridiculous collection of redundant pipework and the specialised tools that are necessary - a short square 'screwdriver' and a secateur to prune your'oses (I know it's an old joke but it was mine originally so there).
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