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Author Topic: Fuel starvation?  (Read 1721 times)

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devgray

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Fuel starvation?
« on: 22 August 2007, 14:44:06 »
'98 TD Elite auto saloon

Generally the car starts faultlessly from cold and drives very well, (bit of cranking needed when warm).

Problem.
The car refuses to start after the computer drops to around the 100mile range, the fuel guage reads about ¼ tank.
I have actually looked in the tank and there is fuel there!
This has not been a great problem, (other than flat batteries) as we just fill the car up before it gets too low, however the problem has suddenly got worse and now the car refuses to start with as much as half a tank.... but not always!

I have changed the fuel filter, but don't know what to do next.

Couldn't see this elsewhere on the forum and hope I'm not going over 'the same old problem'

Dave

« Last Edit: 22 August 2007, 14:46:40 by devgray »
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hotel21

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Re: Fuel starvation?
« Reply #1 on: 22 August 2007, 14:54:06 »
I'm far from an expert on these but I recall similar past posts and it was deduced that 'a' pump is broken?  Don't know if thats the actual fuel injection pump having insufficient draw or a seperate supply pump being unable to supply, but no doubt someone cleverer than wot i is will be along shortly to advise....   :y
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Marks DTM Calib

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Re: Fuel starvation?
« Reply #2 on: 22 August 2007, 16:47:49 »
Pop the tank pump/float assembly out and check the pickup.....they seem to get crudded up on the diseasels.
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devgray

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Re: Fuel starvation?
« Reply #3 on: 22 August 2007, 17:08:25 »
I have investigated the pump /float, but am at a loss as to where/what the 'pickup' is or looks like.
After removing the two pipes and unscrewing the cap, there is a large 5'' dia plastic strainer approx 8'' deep, housing the pump assy.

I tried to remove this but bottled out, thinking i'd make things worse! doh!

Is the pickup point below this?
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TheBoy

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Re: Fuel starvation?
« Reply #4 on: 22 August 2007, 21:05:58 »
Quote
'98 TD Elite auto saloon

Generally the car starts faultlessly from cold and drives very well, (bit of cranking needed when warm).

Problem.
The car refuses to start after the computer drops to around the 100mile range, the fuel guage reads about ¼ tank.
I have actually looked in the tank and there is fuel there!
This has not been a great problem, (other than flat batteries) as we just fill the car up before it gets too low, however the problem has suddenly got worse and now the car refuses to start with as much as half a tank.... but not always!

I have changed the fuel filter, but don't know what to do next.

Couldn't see this elsewhere on the forum and hope I'm not going over 'the same old problem'

Dave

Failed 'in-tank' pump!!  Tends to fail at about 70 - 90k...  ....though may not be noticed until much later if you don't let it run low.

Solution - replace pump, or not let it run low on fuel!
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devgray

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Re: Fuel starvation?
« Reply #5 on: 22 August 2007, 21:51:40 »
Thanks for the replies.
Any idea of the part number for the pump?
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TheBoy

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Re: Fuel starvation?
« Reply #6 on: 22 August 2007, 22:47:25 »
Quote
Thanks for the replies.
Any idea of the part number for the pump?
need to look it up as i need one, but going in to dealer and saying what you want should get right part.

Wonder how much they are...
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TheBoy

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Re: Fuel starvation?
« Reply #7 on: 22 August 2007, 22:47:58 »
oh yes, double check fuse 18 first
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devgray

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Re: Fuel starvation?
« Reply #8 on: 24 August 2007, 16:25:12 »
Fuse 18 OK

£114.00 +vat... ouch

Looking at another thread it's been mentioned that this pump only feeds the main pump for short periods, presumably when starting from cold?

Mine starts perfectly from cold and I don't wanna waste money, any way of checking this pump?
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IrmscherKris

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Re: Fuel starvation?
« Reply #9 on: 24 August 2007, 16:30:27 »
Are you sure the fuel is a factor? You say it's more when it's warm.....

Sounds like the fuel temp sensor on the pump to me  :y
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TheBoy

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Re: Fuel starvation?
« Reply #10 on: 24 August 2007, 16:49:31 »
Quote
Fuse 18 OK

£114.00 +vat... ouch

Looking at another thread it's been mentioned that this pump only feeds the main pump for short periods, presumably when starting from cold?

Mine starts perfectly from cold and I don't wanna waste money, any way of checking this pump?
crank with fuel filter disconnected (and be ready to catch the fuel!)...
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devgray

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Re: Fuel starvation?
« Reply #11 on: 24 August 2007, 17:57:13 »
Quote
Are you sure the fuel is a factor? You say it's more when it's warm.....

Sounds like the fuel temp sensor on the pump to me  :y

If it won't start at, or around the 100mile range, I put in a couple of gallons it runs fine again!

Where is the fuel temp sensor?

It's always electrical probs that I seem to get!!!!

I'll strip the tank pump out tomorrow and try and resolve this?
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TheBoy

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Re: Fuel starvation?
« Reply #12 on: 24 August 2007, 22:04:56 »
Quote
Quote
Are you sure the fuel is a factor? You say it's more when it's warm.....

Sounds like the fuel temp sensor on the pump to me  :y

If it won't start at, or around the 100mile range, I put in a couple of gallons it runs fine again!

Where is the fuel temp sensor?

It's always electrical probs that I seem to get!!!!

I'll strip the tank pump out tomorrow and try and resolve this?
that does sound the same symptoms as a non working fuel pump....
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Grumpy old man
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