Power loss???

**Mrsmopp** · Monday 30th January 2006, 09:15

Driving along as normal all is well cruising at 40 in 4th.......then nothing, diddly squat, no power at all, engine still running until you come to a standstill and then it cuts out all together. Fires straight back up after a couple of seconds as if nothing has happened.

The T5 did this 3 times over a 3 mile journey yesterday - any ideas?

x

**mraldonnelly** · Monday 30th January 2006, 09:46

Mrs M,

Your car's knackered - I'll buy it off you for a quid! LOL, only joking, it could be a really simple fix.

When you say the engine kept running until standstill was this with the clutch in or out?

If you're coasting in gear with the clutch out then the engine will continue to turn over albeit without power until you come to a near stop. In this scenario, if the clutch is pressed in then the engine should stall.

It sounds to me as though the engine is being starved of fuel. At a guess I go with the fuel pump relay to start with. Relay number 103 under the main fusebox cover in the engine bay on the drivers side against the bulkhead. You need to remove the torx screws to get to the relays.

If the relay has developed a poor connection internally then as it warms up it can fail. Either that or the vibrations from the road etc cause a connection to fail imtermittently. You could try giving it a good squirt of WD40 but ultimately I'd replace it. You could try a known good one from one of your many T5's first to make sure you're on the right track.

What year is the car MrsM?

Regards

Andy

**Mrsmopp** · Monday 30th January 2006, 09:50

Its a 95 - I wasn't driving it tho so I cant be sure of the clutch thing.

She had the beathers done on Saturday so maybe someone (volvo) has disturbed things they shouldn't have!!

x

**mraldonnelly** · Monday 30th January 2006, 09:55

Oh, did any dash lights come on while you were still moving (i.e. before the engine cut out)? If so, what ones (I'm after the battery one here at least)?

If not, I assume they all illuminated when the engine cut out at standstill?

Regards

Andy

**mraldonnelly** · Monday 30th January 2006, 10:00

Originally Posted by Mrsmopp

Its a 95 - I wasn't driving it tho so I cant be sure of the clutch thing.

She had the beathers done on Saturday so maybe someone (volvo) has disturbed things they shouldn't have!!

x

Ah, OK, can you take her for a spin ans try to replicate the fault. As soon as you lose power stick the clutch in and see if she stalls. If so then I'd take a stab at the relay, if not then it could be a whole host of things.

Could a faulty MAF cause this? I'm thinking that maybe while coasting the engine is still getting airflow but when stopped it's not. Then again, surely the ECU would just go into limp home mode rather than die completely.

Regards

Andy

**t5tart** · Monday 30th January 2006, 10:15

I have a very similar fault
and have been scratching my head about it

happens out of the blue

the engine just looses all power and cuts out
the engine management light comes on ... pull over turn the key and she fires up straight away
had it a couple of times over the last 18 months

**Mrsmopp** · Monday 30th January 2006, 10:22

Steve has taken her into work today to get one of the technicians to look over her so I'll let you know what the outcome is and if they find anything

x

**r34nismo** · Monday 30th January 2006, 10:26

worth while getting the afm off the car and spraying brake cleaner over it to get all the rubbish off. I have to say i read this thread and thought of the afm instantly if it is giving unreliable readings on voltages the engine light will typically come on.

In most circumstances if they dont read a solid voltage from say 1000mv to 5000mv they usually cause similar things to this, including rough idling, or a hunting type of situation as the afm works then doesnt.

**mraldonnelly** · Monday 30th January 2006, 10:59

Originally Posted by t5tart

I have a very similar fault
and have been scratching my head about it

happens out of the blue

the engine just looses all power and cuts out
the engine management light comes on ... pull over turn the key and she fires up straight away
had it a couple of times over the last 18 months

Just the engine light or all lights? Does this light come on before the engine dies or after?

When the engine stalls all lights should come on, just like when you first turn the key in the ignition.

Regards

Andy

**madness** · Monday 30th January 2006, 10:59

we usually refrain from touching the afm's in any way .
too sensitive and usually breaks them anyway

**Engineer** · Tuesday 31st January 2006, 18:21

Any luck with getting this problem sorted moppy?

**t5tart** · Tuesday 31st January 2006, 18:40

Originally Posted by mraldonnelly

Just the engine light or all lights? Does this light come on before the engine dies or after?

When the engine stalls all lights should come on, just like when you first turn the key in the ignition.

Regards

Andy

yep first engine light then all as it dies then the engine light sometimes stays on sometimes goes off

**t5tart** · Tuesday 31st January 2006, 18:41

Originally Posted by r34nismo

worth while getting the afm off the car and spraying brake cleaner over it to get all the rubbish off. I have to say i read this thread and thought of the afm instantly if it is giving unreliable readings on voltages the engine light will typically come on.

In most circumstances if they dont read a solid voltage from say 1000mv to 5000mv they usually cause similar things to this, including rough idling, or a hunting type of situation as the afm works then doesnt.

excuse my ignorance but whats an afm ??

**Mrsmopp** · Tuesday 31st January 2006, 20:36

No, it hasn't done it since *touches wood* so we haven't had her checked over tbh

x

**Engineer** · Tuesday 31st January 2006, 20:40

Originally Posted by Mrsmopp

No, it hasn't done it since *touches wood* so we haven't had her checked over tbh

x

I can recommend ZZ TOP'S greatest hits in the CD player always stop's mine from missing a beat lol.

**BigJC** · Tuesday 31st January 2006, 21:01

My moneys on the fuel pump relay. I had the same problem on an old 850 (20v glt) and to be honest the local dealer thought I was nuts until they took it out for a road test and nearly had a bump when it cut out!

**Mrsmopp** · Tuesday 31st January 2006, 21:05

Originally Posted by BigJC

My moneys on the fuel pump relay. I had the same problem on an old 850 (20v glt) and to be honest the local dealer thought I was nuts until they took it out for a road test and nearly had a bump when it cut out!

I would be inclined to agree with you tbh - either that or the pump itself. Next time it starts to play up she will go straight to Volvo do not pass go do not collect 200 pounds etc etc and they can see it whilst its till misbehaving!

x

**mraldonnelly** · Tuesday 31st January 2006, 21:23

Originally Posted by Mrsmopp

Next time it starts to play up she will go straight to Volvo

Have you won the lottery MrsM?

Straight to Volvo? Main dealer?

Nah, surely not!

**Mrsmopp** · Tuesday 31st January 2006, 21:25

Its not what you know but who you know Andy

x

**mraldonnelly** · Tuesday 31st January 2006, 21:38

Originally Posted by Mrsmopp

Its not what you know but who you know Andy

x

Lucky git! LOL.

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