The problem with Garv

[Barry S1]

The problem is he runs lovely for miles and
then for no reason will cut out, sometimes when
going fast and sometimes going slow, it happened
again Sunday and I stopped and it seems to be missing
but still running,then will be ok again, have cleaned the pump connections
and got a new coil coming, any ideas please

[phillpot]

I'm sure I don't need to tell you intermittent problems are a bugger!


Are you Sure (as can be) it's a fuel issue, as opposed to ignition?

[Barry S1]

Not at all, just trying to do the cheap things
before I phone Mat Smith, did think it was the
diode playing up but would it just stop ?

[GreenV8S]

You can get a very useful insight into what's going on just by connecting a test lamp from pump positive to ground and another between coil +ve and ground, and put these somewhere you can see while you're driving. If these confirm that you have an electrical problem then you can add further diagnostics to narrow it down. There are so many potential causes for this type of problem that it's almost a waste of time trying to guess, but you don't need anything fancy to track it down methodically.

[Top Gear TVR]

The nearest I've got with this sort of fault were ignition amplifier and maf...

[Scoobimax]

My issues in the V8 prior to EuroTour was fuel pump, despite being only a few weeks old. I changed all ignition parts and ended up at RT Racing as I'd not improved things. No pre-filter and loads of crap in the pump.

Pre-filter now fitted along a new quality fuel pump (Bosch).

Rovergauge confirmed all sensors working correctly too.

Jobs a goodun

[Roy C]

I had something similar with the car about 18 years ago (!) caused by the failure of the multiplug in the injector wiring that sits in the vee (so it got cooked). AFAICR the wires were individually soldered together, but it was a long time ago and it may be worth a look.

[AutoAndy]

I suppose you have checked to see if it still has its yellow connector?

[Barry S1]

Thanks Roy
Will have a look tonight, its still going
well apart from this problem

[greymrj]

That's shame Barry. Did you manage a permanent solution to the damp start problem at Burghley? Presumably so if it went OK in Belgium? Mind you it would be surprising if damp didnt get in somewhere, at one point on a flooded bit an oncoming truck sent a bow wave clean up to the screen of the S. I am amazed it didnt cut out.
I can think of one problem with Garv, you keep referring to it as a he, now if you just treated it as a she......;)

[SteveOS3]

I had a similar problem a few months ago, it turned out to be a melting fuse causing intermittent failures. I cut it out and replaced it with inline fuse.

Worth checking all the fuses for signs of melting before getting into more complicated work?

[Barry S1]

Yes all sorted now Richard new leads and everything
,did get water in but was a good once I put the roof
on, thanks for advice think I'll probably have to miss
barn farm and get it sorted before Le Mans

[Stew Mc]

Barry S1 said:

Yes all sorted now Richard new leads and everything
,did get water in but was a good once I put the roof
on, thanks for advice think I'll probably have to miss
barn farm and get it sorted before Le Mans

That's a shame Barry. Hope you find the problem mate. Stew and Karen.

[greymrj]

Agreed, a great shame Barry had hoped to see you and the white beast prowling round Derbyshire.

[LawrieS]

Have a free seat if you want to join in the fun? Leaving mine Saturday morning, leave the daily here?

[Barry S1]

Thanks but I need to find the problem
if I wasn't going to Le Mans I would
have gone

[Le TVR]

phillpot said:

Are you Sure (as can be) it's a fuel issue, as opposed to ignition?

Not too diffficult:

Fuel pump/relay: Power 'fades' quite quickly rather than a sudden cut-out.

Ignition power feed: Power cuts instantly. Tacho drops to zero even before the car has stopped.

[Barry S1]

Fitted new coil and diode thing ( thanks
Mike I'm still saving up ) still the same
so had to fit the new petrol pump and bingo
seems good now only done about 15 miles in
a thunder storm so far, more testing tomorrow.

[Griffinr]

Barry S1 said:

Fitted new coil and diode thing ( thanks
Mike I'm still saving up ) still the same
so had to fit the new petrol pump and bingo
seems good now only done about 15 miles in
a thunder storm so far, more testing tomorrow.

Barry, has the problem stayed fixed? I've had similar symptoms this week, either wouldn't start or once running stopped suddenly and then would restart after a few attempts. Traced the problem to the ignition switch tonight. The black plastic bit that carries the terminals was loose in the diecast switch body and as as you wiggled it the pump cut in and out. I have now re staked it and it seems ok but i may see if I can get a new one.
Rob.

[glenrobbo]

Hi Rob,
Garv ran faultlessly all the way down to Le Mans for the Classic, did the parade laps with no probs and was fault-free all the way back until we got on the M25 just past the Dartford Tunnel, when he suddenly faltered and died. But then he restarted and carried on to make it home in a torrential downpour.
I'll tell Barry to check his ign switch, thanks for the heads up.