Engine: 850 T5/R - Won't run - Page 2

liuleichan · Jun 16th, 2009, 16:30

Quote:

Originally Posted by adieu

just seems like it will run for a few seconds die and then if you try and restart it straight away it just turns over. If you leave it a minute or so it will start and die again.

I've seen the same symptoms from a faulty fuel pump.

Chris_Rogers · Jun 16th, 2009, 17:27

Try removing the fuel pump relay and shorting the two larger connections together to bypass the relay.

This not a simple relay, the 'prime' (when you first turn the ignition on) and run conditions (once the engine is running) are different, so the relay may prime the pump but not operate in the run mode.

adieu · Jun 16th, 2009, 19:43

ok, checked the relay, seems to be closing ok, but as you start the car it opens again. pics attached.

Is this normal, because we held it in the closed postion and the car ran fine.

Chris_Rogers · Jun 16th, 2009, 20:13

The relay is faulty, repair or replace it.

http://www.matthewsvolvosite.com/for...pic.php?t=9681

adieu · Jun 16th, 2009, 20:27

Your all great thank youall so much for your help today.

biggest thanks to Jod and Chris.

adieu · Jun 17th, 2009, 14:56

Ok I followed the repair guide on the link and put the relay back in the car.

Started and ran i was able to rev the car and all seemed well. sat there for about 30 secs and then died again.

Tried to start it again and I have the same problem as before. Relay closes and then flicks open again after about 2 seconds. I can hold it shut and the fuel pump runs all the time and the car will start.

Could someone just have a quick look at theirs if they get the time and let me know if thiers does

Could it be some other component on the relay that is knackered?

Chris_Rogers · Jun 17th, 2009, 17:50

I think I'd give up with the old relay and buy a new one. Don't think they are that expensive.

As a temporary measure you could just short the large connections on the relay base. This will run the fuel pump all the time the ignition is on.

The complication of the original relay is to stop the fuel flow in the event of the engine stopping due to a collision, it's a replacement for the old inertia switch.

adieu · Jun 18th, 2009, 16:12

Well she's all fixed.

New relay

Thanks again everyone.

Jun 16th, 2009, 20:27	#15
adieu Master Member Last Online: Feb 5th, 2021 19:07 Join Date: Dec 2002 Location: swindon	Your all great thank youall so much for your help today. biggest thanks to Jod and Chris. __________________ Speed has never killed anyone, suddenly becoming stationary… That’s what gets you. A turbo: Exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster

Jun 17th, 2009, 14:56	#16
adieu Master Member Last Online: Feb 5th, 2021 19:07 Join Date: Dec 2002 Location: swindon	bugger Ok I followed the repair guide on the link and put the relay back in the car. Started and ran i was able to rev the car and all seemed well. sat there for about 30 secs and then died again. Tried to start it again and I have the same problem as before. Relay closes and then flicks open again after about 2 seconds. I can hold it shut and the fuel pump runs all the time and the car will start. Could someone just have a quick look at theirs if they get the time and let me know if thiers does Could it be some other component on the relay that is knackered? __________________ Speed has never killed anyone, suddenly becoming stationary… That’s what gets you. A turbo: Exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster

Jun 18th, 2009, 16:12	#18
adieu Master Member Last Online: Feb 5th, 2021 19:07 Join Date: Dec 2002 Location: swindon	Well she's all fixed. New relay Thanks again everyone. __________________ Speed has never killed anyone, suddenly becoming stationary… That’s what gets you. A turbo: Exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster

Jun 16th, 2009, 17:27	#12
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	Try removing the fuel pump relay and shorting the two larger connections together to bypass the relay. This not a simple relay, the 'prime' (when you first turn the ignition on) and run conditions (once the engine is running) are different, so the relay may prime the pump but not operate in the run mode.

Jun 16th, 2009, 20:13	#14
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	The relay is faulty, repair or replace it. http://www.matthewsvolvosite.com/for...pic.php?t=9681

Jun 17th, 2009, 17:50	#17
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	I think I'd give up with the old relay and buy a new one. Don't think they are that expensive. As a temporary measure you could just short the large connections on the relay base. This will run the fuel pump all the time the ignition is on. The complication of the original relay is to stop the fuel flow in the event of the engine stopping due to a collision, it's a replacement for the old inertia switch.

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