ZT 220s cranks over but won't fire up - Page 4

SD1too · 27th April 2015, 12:15

So much for "MG Rover specialists" eh Susie?

Simon

Em gee girl · 27th April 2015, 13:09

Probably would have worked out cheaper to fly one of you over here to Oz to fix my car....

Organiser · 27th April 2015, 13:28

Quote:

Originally Posted by clf

are you getting fuel to the engine? the pumps may well be working, but if the fuel is not reaching the injectors........

Good to read that the fault has now been found.

But as above, how come they did not check that fuel was flowing from the valve on the fuel rail??

Tom.

RodgerD · 27th April 2015, 14:44

1/2 hours work to check both sides of the tank. Fuel transfer is a problem on diesel cars if the in-tank pump fails, not heard of a petrol scavenger system fail on a petrol car, although I'm sure it has happened. Still hopefully your are now all set to got, all be it much lighter in the wallet. For what you have paid out, it would have been cheaper to have one of our specialists fly out from the UK.

T-Cut · 27th April 2015, 16:27

The salient question is why was the pump side of the tank empty? It doesn't do that normally and should be addressed. Petrol being transferred preferentially to the LHS of the tank is typically due to evolving FFS. Eventually, the fuel's too low for the pump to prime. Before this happens, the pump sends petrol from RHS into the filter module on the LHS. FFS causes fuel to leak out of the filter so reducing pressure at the engine. It won't start properly. The lack of adequate pressure bleed-off from the filter causes failure of the venturi pumps, which balance the level in the RHS. It was noted earlier that a FOC was fitted, but I'd be inclined to check it's properly in position. If so, the filter Oring will have deteriorated or displaced when the FOC work was done. That's what I refer to as evolving FFS.

Topping up with more fuel doesn't fix the problem. The engine will start while the pump's submerged, but I'd expect the problem to return once the progressive transfer to the LHS isolates the pump again. Of course one could do the diesel dodge and keep the tank reasonably full all the time. But sooner or later, it won't start at all.

TC

maxi_crawf · 27th April 2015, 16:36

Well I've been following this thread and I'm glad to see it looks like it's finally been sorted out, is there any way you can get back some of that vast amount of your money that the mechanic has "wasted"?

T-Cut · 27th April 2015, 16:56

Quote:

Originally Posted by maxi_crawf

Well I've been following this thread and I'm glad to see it looks like it's finally been sorted out,

My personal opinion, but I doubt that it has, yet.

TC

SD1too · 27th April 2015, 18:46

Quote:

Originally Posted by Organiser

... how come they did not check that fuel was flowing from the valve on the fuel rail??

Because they've nominated themselves as "MG Rover specialists" and people are persuaded by this title and don't feel inclined to question their work. It's marketing triumphing over expertise.

Simon

Mike Noc · 27th April 2015, 19:11

Quote:

Originally Posted by RodgerD

1/2 hours work to check both sides of the tank. Fuel transfer is a problem on diesel cars if the in-tank pump fails....

Funnily enough it isn't. The diesel is drawn from, and returns to the offside saddle of the tank. When the ITP fails the priming valve on top of the ITP remains open - when the fuel level drops to the top of the ITP air is drawn in.

So although there is still plenty of fuel in that side of the tank the UBP can't draw it up.

Easier to see when you run the pumps up on the bench.

Borg Warner · 27th April 2015, 19:21

Quote:

Originally Posted by Em gee girl

So here is the error code that came up.....T0563.......my mechanic says relates to either:

1. under bonnet relay box
2. Engine ECU

So he wants to change the relay first as it will be the cheaper option and see if that fixes my problem....if not then the next step is the ECU??

The car has only stopped once in his workshop and the above error message was given....

Does anyone have any thoughts........Is he right that it is either the relay box or the ECU.....???

He has tried another cam sensor and done all the checks you all have suggested on here as far as I know!

When my FOC was "repaired" by a recommended MG garage exspurt they replaced the unit incorrectly. Three times incorrectly. On the second event they plugged a T4 in and I just about saw the error code on the screen and if I remember correctly it said something along the lines of "under bonnet relay box". Which they ignored??? It has been 4 years ago mind. After the third event they finally diagnosed they had pinched one of the 'O' rings on the fuel filter causing it not to transfer fuel from one side to the other. See the explanation by TC

Once this was replaced all was good.

It is not uncommon for the simplest of things to causes us the biggest headaches - incompetence perhaps being top of the list. Not sure if it is comforting or worrying that such issues are just as prevalent in OZ. Hope you get it sorted soon.

27th April 2015, 12:15	#31
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,517 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	So much for "MG Rover specialists" eh Susie? Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

27th April 2015, 13:09	#32
Em gee girl Newbie MG ZT 220s Join Date: Mar 2012 Location: Sydney Posts: 22 Thanks: 14 Thanked 2 Times in 2 Posts	Probably would have worked out cheaper to fly one of you over here to Oz to fix my car.... __________________ Em gee girl Sydney Australia [SIGPIC][/SIGPIC]

27th April 2015, 14:44	#34
RodgerD Rodger & Out Rover 75 Saloon Join Date: Nov 2014 Location: London Posts: 712 Thanks: 10 Thanked 159 Times in 141 Posts	1/2 hours work to check both sides of the tank. Fuel transfer is a problem on diesel cars if the in-tank pump fails, not heard of a petrol scavenger system fail on a petrol car, although I'm sure it has happened. Still hopefully your are now all set to got, all be it much lighter in the wallet. For what you have paid out, it would have been cheaper to have one of our specialists fly out from the UK. Last edited by RodgerD; 27th April 2015 at 14:46..

27th April 2015, 16:27	#35
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,754 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	The salient question is why was the pump side of the tank empty? It doesn't do that normally and should be addressed. Petrol being transferred preferentially to the LHS of the tank is typically due to evolving FFS. Eventually, the fuel's too low for the pump to prime. Before this happens, the pump sends petrol from RHS into the filter module on the LHS. FFS causes fuel to leak out of the filter so reducing pressure at the engine. It won't start properly. The lack of adequate pressure bleed-off from the filter causes failure of the venturi pumps, which balance the level in the RHS. It was noted earlier that a FOC was fitted, but I'd be inclined to check it's properly in position. If so, the filter Oring will have deteriorated or displaced when the FOC work was done. That's what I refer to as evolving FFS. Topping up with more fuel doesn't fix the problem. The engine will start while the pump's submerged, but I'd expect the problem to return once the progressive transfer to the LHS isolates the pump again. Of course one could do the diesel dodge and keep the tank reasonably full all the time. But sooner or later, it won't start at all. TC Last edited by T-Cut; 27th April 2015 at 17:03..

27th April 2015, 16:36	#36
maxi_crawf Posted a thing or two R75 Saloon Conn CDT SE, MG ZT190+ Join Date: Nov 2006 Location: Kingston-upon-Hull Posts: 1,960 Thanks: 823 Thanked 426 Times in 274 Posts	Well I've been following this thread and I'm glad to see it looks like it's finally been sorted out, is there any way you can get back some of that vast amount of your money that the mechanic has "wasted"?