240 General: - Help! Wont start, No ground to pump relay

Oval Cog · Nov 3rd, 2021, 14:55

I can't seem to figure out why my 88 240 won't start. The pumps will not run and the fuel injectors also are not functioning. I have traced the problem to the fuel relay... no ground on bl/gn wire going into the relay, coming from pin 17 on the ECU. if I take the cover off of the relay and manually make contact with the relay, push it together.. no joy, it still will not start. It does have spark, it will start with a squirt of starter fluid any help would be great thanks.

grumpydad · Nov 5th, 2021, 20:53

HI
the ecu uses the ground to fire the injectors so it might be a ecu problem or the ecu not getting a signal form something else
sorry I cant help more

jasons · Nov 5th, 2021, 21:54

had similar thing, I also opened fpr and wedged the relay so I could hear the fp prime.

My reason for no spark turned out to be cps.

Oval Cog · Nov 6th, 2021, 03:30

Thanks guys for the responses mines and 88 so it has a Hall effect sensor instead of a CPS. I ordered an ECU off feebay 😂. I cleaned my grounds as well…I think it could be my ECU . I’ll update once I get it and try. Thanks

Wagon Sailor · Nov 6th, 2021, 17:23

I'm told that you can bypass the relay thus:-

Clifford Pope · Nov 7th, 2021, 11:32

Am I reading this correctly - manually closing the relay contacts has no result, but joining the contacts for fuses 4 and 6 lets the engine start?

That surely suggests that the fault lies in the relay itself - have you tried simply replacing it?

Stephen Edwin · Nov 9th, 2021, 10:45

I am partly confuddled, not sure of some terms &c used in posts in this thread so far.

But here's a link to an old thread that might help.

https://www.volvoforums.org.uk/showt...lay+blade+fuse

The information in that thread needs to be made in to an HowTo for the forum. The information would be useful in the Articles area of the 240 section of the forum. Before people remembering that thread are not often here to remember.

Stephen

.

Wagon Sailor · Nov 9th, 2021, 17:56

We've had similar issues. A £15 relay from ebay sorted it.

jasons · Nov 9th, 2021, 20:05

removed under car FP by fuel filter, it could not be heard at all, on the bench it has circuit, then tested with 12v and it pumps, now it may have got stuck, or it may be wiring, so in daylight tomorrow back under the car to test wiring and see if pump works again on wiring, it would be lucky if it was just a stuck pump...

Nov 3rd, 2021, 14:55	#1
Oval Cog New Member Last Online: Nov 6th, 2021 03:30 Join Date: Nov 2021 Location: Barberton, Ohio	Help! Wont start, No ground to pump relay I can't seem to figure out why my 88 240 won't start. The pumps will not run and the fuel injectors also are not functioning. I have traced the problem to the fuel relay... no ground on bl/gn wire going into the relay, coming from pin 17 on the ECU. if I take the cover off of the relay and manually make contact with the relay, push it together.. no joy, it still will not start. It does have spark, it will start with a squirt of starter fluid any help would be great thanks.

Nov 6th, 2021, 17:23	#5
Wagon Sailor Junior Senior Last Online: Today 09:53 Join Date: Dec 2019 Location: Hampshire	I'm told that you can bypass the relay thus:- __________________ ---------------------------------- Great spec; great build quality.

Nov 9th, 2021, 10:45	#7
Stephen Edwin Premier Member Last Online: Oct 26th, 2023 20:42 Join Date: Jun 2010 Location: Thurrock	I am partly confuddled, not sure of some terms &c used in posts in this thread so far. But here's a link to an old thread that might help. https://www.volvoforums.org.uk/showt...lay+blade+fuse The information in that thread needs to be made in to an HowTo for the forum. The information would be useful in the Articles area of the 240 section of the forum. Before people remembering that thread are not often here to remember. Stephen . __________________ *The most savage controversies are those about matters as to which there is no good evidence either way.* —Bertrand Russell Last edited by Stephen Edwin; Nov 9th, 2021 at 10:56.

Nov 9th, 2021, 17:56	#8
Wagon Sailor Junior Senior Last Online: Today 09:53 Join Date: Dec 2019 Location: Hampshire	We've had similar issues. A £15 relay from ebay sorted it. __________________ ---------------------------------- Great spec; great build quality.

Nov 5th, 2021, 20:53	#2
grumpydad Senior Member Last Online: Yesterday 23:44 Join Date: Dec 2015 Location: eastsussex	HI the ecu uses the ground to fire the injectors so it might be a ecu problem or the ecu not getting a signal form something else sorry I cant help more

Nov 5th, 2021, 21:54	#3
jasons Junior Member Last Online: Aug 20th, 2023 19:35 Join Date: Jul 2010 Location: derbyshire	had similar thing, I also opened fpr and wedged the relay so I could hear the fp prime. My reason for no spark turned out to be cps.

Nov 6th, 2021, 03:30	#4
Oval Cog New Member Last Online: Nov 6th, 2021 03:30 Join Date: Nov 2021 Location: Barberton, Ohio	Thanks guys for the responses mines and 88 so it has a Hall effect sensor instead of a CPS. I ordered an ECU off feebay 😂. I cleaned my grounds as well…I think it could be my ECU . I’ll update once I get it and try. Thanks

Nov 7th, 2021, 11:32	#6
Clifford Pope Not an expert but ... Last Online: Today 08:29 Join Date: Dec 2001 Location: Boncath	Am I reading this correctly - manually closing the relay contacts has no result, but joining the contacts for fuses 4 and 6 lets the engine start? That surely suggests that the fault lies in the relay itself - have you tried simply replacing it?

Nov 9th, 2021, 20:05	#9
jasons Junior Member Last Online: Aug 20th, 2023 19:35 Join Date: Jul 2010 Location: derbyshire	removed under car FP by fuel filter, it could not be heard at all, on the bench it has circuit, then tested with 12v and it pumps, now it may have got stuck, or it may be wiring, so in daylight tomorrow back under the car to test wiring and see if pump works again on wiring, it would be lucky if it was just a stuck pump...

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