Plenum Check - The Reason Why **ALL OWNERS PLEASE NOTE**

[Anthony & Maricel]

Originally Posted by Arctic

Checked two members cars within two days and both have had at least 4" of water in the plenums, and have just about been saved from giving the ECU a good bath so do not delay in this weather check and check regular Arctic

I serviced mine yesterday and changed the cabin filter, mine was bone dry with a few loose dead leafs in the bottom that I removed and checked the drain hole with a rod.

[jim pateman]

hi thanks for this thread, i hope it has sorted my problem, as i think water was getting into ecu and giving much head scratching

[hogweed]

It’s a funny one, this. I’ve had my car for 3½ years now, and never had a drop of water in the plenum.

At some stage before I owned it, it's been well flooded – the corrosion inside the ECM went up several inches, as did the water mark on the pollen filter.

But, because I had to rip my rusty ECM out and get the sainted Marinabrian to replace it, I do check the old plenum from time to time, and it's always bone dry.

And I live in the country, surrounded by clouds of leaves, insects, bird feathers etc… they just never seem to get in and block it…

[Jules]

Treat your car to one of these kits for Xmas (and for the rest of it's life

And stop the debris getting down there in the first place


http://www.the75andztclub.co.uk/foru...ad.php?t=68328

[jim pateman]

Originally Posted by Arctic

Checked two members cars within two days and both have had at least 4" of water in the plenums, and have just about been saved from giving the ECU a good bath so do not delay in this weather check and check regular Arctic

hi artic, my plenums were blocked,cleared now and modified, do you think this is what was courseing sometimes not starting even with good charge in battery and plenty of fuel, ???

[Arctic]

Originally Posted by jim pateman

hi artic, my plenums were blocked,cleared now and modified, do you think this is what was courseing sometimes not starting even with good charge in battery and plenty of fuel, ???

64 million dollar question, how is it now that you have cleared the plenums,? as poor starting can be few reasons really just to say it was the ECu maybe getting wet would be a wrong diagnosis on it's own,
faulty injector, cam sensor, crank sensor, ITP, UBP, etc but as I say how is it now ?

[jim pateman]

Originally Posted by Arctic

64 million dollar question, how is it now that you have cleared the plenums,? as poor starting can be few reasons really just to say it was the ECu maybe getting wet would be a wrong diagnosis on it's own,
faulty injector, cam sensor, crank sensor, ITP, UBP, etc but as I say how is it now ?

hi again, the car always starts very well, but what it is doing now is it starts fine then as i move off it just cuts out and no electrics work and noticed the oil and battery lights are on dimley even when key removed, if i press the key to unlock and lock while the battery disconnected, when connected again the alarm sounds, when switched off all is fine and it will start but when try to move off again goes about ten yards and does it again, ???

[Jules]

Sounds like a wire chaffing.
Trace closely the cable from the ALT to Batt (they have been known to chaff)
Also measure voltage across all the heavy earth points.
There shouldn't be any more than a few Milli-volts potential difference between any earth point to the next, particularly between engine, chassis and neg Batt terminal.

[jim pateman]

Originally Posted by jim pateman

hi again, the car always starts very well, but what it is doing now is it starts fine then as i move off it just cuts out and no electrics work and noticed the oil and battery lights are on dimley even when key removed, if i press the key to unlock and lock while the battery disconnected, when connected again the alarm sounds, when switched off all is fine and it will start but when try to move off again goes about ten yards and does it again, ???

Originally Posted by Jules

Sounds like a wire chaffing.
Trace closely the cable from the ALT to Batt (they have been known to chaff)
Also measure voltage across all the heavy earth points.
There shouldn't be any more than a few Milli-volts potential difference between any earth point to the next, particularly between engine, chassis and neg Batt terminal.

hi jules all checked and ok had diognostic done and says cant find a fault, ???

[Jules]

What sort of diagnostic & what Voltage was the ALT pushing out?