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Please play nicely.  No one wants to listen/read a keyboard warriors rants....

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Author Topic: Problem after problem after...  (Read 2465 times)

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STEMO

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Re: Problem after problem after...
« Reply #45 on: 17 November 2019, 21:01:01 »

Aye, I'm not wearing out my keyboard typing out a replacement, we're frugal up North you know! That's why we remove so many letters from words, save us time  :D
Coventry, up north? Last time I looked it was in the Midlands.
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Diamond Black Geezer

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Re: Problem after problem after...
« Reply #46 on: 17 November 2019, 21:23:21 »

I mean we - genetically,by birth - we live in Cov now, but I am bringing my good sense and penny-pinching ways to the Mercians  :y


Right, this is causing confusion, I'm changing my profile now  ;)
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Diamond Black Geezer

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Re: Problem after problem after...
« Reply #47 on: 18 November 2019, 07:42:36 »

Oh dear...

Because other half needs Omeg a for work I thought safest bet, just swap batteries. So the known good, used every day battery from the Volvo C30 (74ah Varta 750CCA, coincidentally enough!) goes in the Omega. This morning....

struggles to start, five seconds of fast cranking, engine nearly catches a couple of times. Stop. Then try cranking again, engine fires up instantly. Then, thirty seconds up the road at traffic lights engine dies, restarts instant.

So as I see it either...

1) the little Volvo is a 1.6 and requires a lot less 'oomph' in its battery to run fine, so actually this test has proven the Ovlov's battery is, too, on its way out. Just isn't as noticeable on the smaller car, yet. Brand new battery will be the cureall.

2) the Volvo has a lot more systems than the Omega, it's ten years newer, hence it requires a bigger battery in the first place. The Ovlov battery is fine. Hence the problem clearly ain't battery.

 :-\ :-*
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johnnydog

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Re: Problem after problem after...
« Reply #48 on: 18 November 2019, 09:33:08 »

I think I'd be looking elsewhere than the battery - engine dying after 30 secs of driving, and to restart immediately suggests the fault lies somewhere else....
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Enceladus

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Re: Problem after problem after...
« Reply #49 on: 18 November 2019, 12:37:51 »

I think I'd be looking elsewhere than the battery - engine dying after 30 secs of driving, and to restart immediately suggests the fault lies somewhere else....
Classic failing crank sensor, but wasn't that recently replaced?
A weak or failing fuel pump seems to be popular at the moment?

Does the C30 have Stop/Start? If so it probably has an EFB or AGM battery. Might not like the Omega's charging voltage, 30 seconds wouldn't hurt it though.
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Re: Problem after problem after...
« Reply #50 on: 18 November 2019, 13:38:42 »

Fuel pump just replaced as well ;)
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Diamond Black Geezer

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Re: Problem after problem after...
« Reply #51 on: 18 November 2019, 13:48:12 »

Yup  :y

Brand new genuine GM - even pushed aside near the wing, away from manifold. (Car didn't have these issues on the old one, which I suspect is fine)
Brand new Bosch fuel pump (well about 2 weeks old if that)
C30 doesn't have stop start, it's before the 'rot set in'  :y

Car idles like a dream, perhaps better than a month or two ago (there's been oil/filter/spark change, plug genuine Bosch DISpack changed since then, so not surprising) to the point I have to sometimes check the rev counter that the engine hasn't stalled, no sound or vibration in the cabin. But within a minute of cold starting, changes are she'll just die. However warm/hot engine starts on the button, straight away.

We went out this morning on a bit of a test drive, (15 mins, then car stood for an hour, then back) and zero issues. Left lights and other draining systems off to be on the safe side, but battery voltage at worst dropped to 12.65v after being left for an hour, but was 12.7-12.8 after each run. I'm going to check the battery later today, just to see how low it drops to, in case this 'spare' battery is 'as bad' as my original.

New battery has been posted so should be with me tomorrow.
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Diamond Black Geezer

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Re: Problem after problem after...
« Reply #52 on: 18 November 2019, 13:56:54 »

The list of things that aren't brand new is very nearly shorter than the list of new....  ::)

Just brainstorming things that may/could be part of the issue here... (ie: not 'new' parts)

-Battery - isn't new, just different, so technically this could be still the issue. Car's definitely starting faster on this one, though.
-Fuel pump relay
-Fuel injector relay
-Fuel filter (maybe 3 years old, I suppose couldn't hurt to change, however can't for a second imagine this would cause the car to just die instantly, then start perfect and run fine for hours afterward)
-FPR getting dickey/old letting fuel leak back in the feed pipes.

My theory is the long start (I'm not calling it a 'slow start' because the engine turns over fast, it just takes 5 seconds/one or two tries) and the engine dying issue are actually two separate problems. The first, fueling in some way; the second, electrical ie: battery.

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dave the builder

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Re: Problem after problem after...
« Reply #53 on: 18 November 2019, 14:03:54 »

you can't rule out a new part being duff like a crank sensor
fuel pump relay ,after the trauma to it of failing fuel pump  :-\
is the Omega fuel pump relay just a simple purple 70 amp 4 pin relay ?
or the old style (Carlton,astra,senator) with 2 coils and a diode (well known to fail)
or the new pump is U/S ,blocked fuel filter,line etc
sounds like intermittent fuel starvation fault anyway to me
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Re: Problem after problem after...
« Reply #54 on: 18 November 2019, 16:00:55 »

you can't rule out a new part being duff like a crank sensor
fuel pump relay ,after the trauma to it of failing fuel pump  :-\
is the Omega fuel pump relay just a simple purple 70 amp 4 pin relay ?
or the old style (Carlton,astra,senator) with 2 coils and a diode (well known to fail)
or the new pump is U/S ,blocked fuel filter,line etc
sounds like intermittent fuel starvation fault anyway to me
Yup two... One for the injectors and one for the pump. Next to each other in the engine bay fuse box :y
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aaronjb

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Re: Problem after problem after...
« Reply #55 on: 18 November 2019, 16:30:36 »

When suffering a long run of strange problems like this, on a car that's getting a bit long in the tooth, the best answer is probably..

with


I mean.. er.. insert something more helpful here. Sorry DBG ;)
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Diamond Black Geezer

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Re: Problem after problem after...
« Reply #56 on: 18 November 2019, 17:59:35 »

To be honest that's no worse an idea than I've come up with!  :y

Anyone got a couple if purple relays kicking around? The amount of scrap Omegas I've scavenged and never thought to get a set of spare relays  ::) if we think they'd be a good place to start... Or can I at least test the ones I have. Day off tomorrow so lots of time...
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dave the builder

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Re: Problem after problem after...
« Reply #57 on: 18 November 2019, 18:43:14 »

To be honest that's no worse an idea than I've come up with!  :y

Anyone got a couple if purple relays kicking around? The amount of scrap Omegas I've scavenged and never thought to get a set of spare relays  ::) if we think they'd be a good place to start... Or can I at least test the ones I have. Day off tomorrow so lots of time...
are none of the other relays the same ? i've not looked
if it is a standard relay any factors or parts store should have one
where in Cov are you ? PM me
test wise ,should be plenty of youtube videos
may be pitted/worn contacts on he relay ,so it will click but make poor/intermittent contact
easy enough to bypass a simple relay
on this one clicky just jump the 2 fat terminals
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terry paget

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Re: Problem after problem after...
« Reply #58 on: 18 November 2019, 19:50:32 »

To be honest that's no worse an idea than I've come up with!  :y

Anyone got a couple if purple relays kicking around? The amount of scrap Omegas I've scavenged and never thought to get a set of spare relays  ::) if we think they'd be a good place to start... Or can I at least test the ones I have. Day off tomorrow so lots of time...
As there are two, just swop them over and see if anything changes.
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Diamond Black Geezer

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Re: Problem after problem after...
« Reply #59 on: 18 November 2019, 20:05:03 »

Oh, knew they were both purple, in truth no idea they were identical components! Ta. Will try that.  :y
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