Engine 850: B5234T/2.3/20v/T5: - Lumpy start up problem

terry_cunnane · Mar 17th, 2010, 22:30

Hi,

I'm worried about my V70 starting. It starts ok but the tickover is lumpy for about 30 seconds. After that it's fine.
There are no fault codes showing up and it has one coil per spark plug so no HT leads and distributor to worry about. The plugs were renewed two years ago and are not due for another year.

I'd like to sort it before it becomes worse as I'm sure it will.

Can anyone help please?

Terry

deathrider311271 · Mar 17th, 2010, 22:38

possibly fuel injector leaking, or a plug on way out

terry_cunnane · Mar 18th, 2010, 20:43

Thanks.
I'll start taking out the plugs to see what they're like.
Terry

liuleichan · Mar 19th, 2010, 19:07

Quote:

Originally Posted by terry_cunnane

Hi,

I'm worried about my V70 starting. It starts ok but the tickover is lumpy for about 30 seconds. After that it's fine.
There are no fault codes showing up and it has one coil per spark plug so no HT leads and distributor to worry about.

Doesn't mean the leads or individual coils can't go bad, though.

Quote:

Originally Posted by terry_cunnane

The plugs were renewed two years ago and are not due for another year.

Well I wouldn't use that time-based criteria to discern that it couldn't be the plugs - a good look at them should tell you whether there's something amiss (either with the plug, or lead / coil).

terry_cunnane · Mar 19th, 2010, 21:42

Took out the plugs. They look good. I'll run the car for a few times now to see what happens. I'm thinking that if the problem carries on I'll replace the plugs next.

Terry

charlotte001 · Mar 20th, 2010, 10:15

I don't know different the V70 is from the 850 T-5's but the coolant switch goes on 850's and will cause all kinds of problems in starting FYI Eurocarparts have them for £19 inc vat. Not sure what Rufe can do them for might be worth an ask

terry_cunnane · Mar 22nd, 2010, 11:00

Thanks Charlotte001,

The lumpy start persists. I'll look for that coolant switch. Any idea where I might find it if there is one?

Terry

terry_cunnane · Mar 22nd, 2010, 21:04

hi Charlotte001,

I found the coolant switch. I used an ohmmeter on it this afternoon when cold and the reading was 3000 ohm. When up to temperature it dropped a lot. The engine wasn't stone cold as I had used it in the morning so I don't know if the readings are conclusive.

I had looked at this to get some information

Perhaps I'd better try it again on a proper cold start.

terry_cunnane · Mar 29th, 2010, 23:48

Well I've changed the plugs but there seems to be no change.

Terry

Mar 17th, 2010, 22:30	#1
terry_cunnane The accompanist Last Online: May 11th, 2024 08:19 Join Date: Dec 2001 Location: Great Yarmouth	Lumpy start up problem Hi, I'm worried about my V70 starting. It starts ok but the tickover is lumpy for about 30 seconds. After that it's fine. There are no fault codes showing up and it has one coil per spark plug so no HT leads and distributor to worry about. The plugs were renewed two years ago and are not due for another year. I'd like to sort it before it becomes worse as I'm sure it will. Can anyone help please? Terry __________________ 1999 V70SE T5 auto. front wheel drive

Mar 18th, 2010, 20:43	#3
terry_cunnane The accompanist Last Online: May 11th, 2024 08:19 Join Date: Dec 2001 Location: Great Yarmouth	Thanks. I'll start taking out the plugs to see what they're like. Terry __________________ 1999 V70SE T5 auto. front wheel drive

Mar 19th, 2010, 21:42	#5
terry_cunnane The accompanist Last Online: May 11th, 2024 08:19 Join Date: Dec 2001 Location: Great Yarmouth	Plugs checked Took out the plugs. They look good. I'll run the car for a few times now to see what happens. I'm thinking that if the problem carries on I'll replace the plugs next. Terry __________________ 1999 V70SE T5 auto. front wheel drive

Mar 20th, 2010, 10:15	#6
charlotte001 Premier Member Last Online: Jul 26th, 2012 11:13 Join Date: Jul 2009 Location: norwich	lumpy I don't know different the V70 is from the 850 T-5's but the coolant switch goes on 850's and will cause all kinds of problems in starting FYI Eurocarparts have them for £19 inc vat. Not sure what Rufe can do them for might be worth an ask __________________ Previous Volvos:850 GLT 2.5 20V Auto Saloon Silver. 1997 850 T-5 Auto Estate Nautic Blue Chipped ECU, V70 TCV, Carbon Cased Filter, 17inch alloys, Rattling Engine masking the suspension rattles. Engine doesn't rattle anymore

Mar 22nd, 2010, 11:00	#7
terry_cunnane The accompanist Last Online: May 11th, 2024 08:19 Join Date: Dec 2001 Location: Great Yarmouth	Coolant Switch Thanks Charlotte001, The lumpy start persists. I'll look for that coolant switch. Any idea where I might find it if there is one? Terry __________________ 1999 V70SE T5 auto. front wheel drive

Mar 17th, 2010, 22:38	#2
deathrider311271 I've Been Banned Last Online: Jun 21st, 2022 19:26 Join Date: Mar 2010 Location: Grimsby	possibly fuel injector leaking, or a plug on way out

Mar 22nd, 2010, 21:04	#8
terry_cunnane The accompanist Last Online: May 11th, 2024 08:19 Join Date: Dec 2001 Location: Great Yarmouth	Found it hi Charlotte001, I found the coolant switch. I used an ohmmeter on it this afternoon when cold and the reading was 3000 ohm. When up to temperature it dropped a lot. The engine wasn't stone cold as I had used it in the morning so I don't know if the readings are conclusive. I had looked at this to get some information Perhaps I'd better try it again on a proper cold start. __________________ 1999 V70SE T5 auto. front wheel drive

Mar 29th, 2010, 23:48	#9
terry_cunnane The accompanist Last Online: May 11th, 2024 08:19 Join Date: Dec 2001 Location: Great Yarmouth	Plugs changed Well I've changed the plugs but there seems to be no change. Terry __________________ 1999 V70SE T5 auto. front wheel drive

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