440 Misfire - Page 2

740Estate · May 26th, 2006, 10:44

If the coolant looks clear, chances are it's the wrong mix. too much water would give rise to an increase in it's consumption and the temperature readings ( lower boiling point, etc, etc.) Like you say, hot weather, etc..

HOWEVER, you do have a misfire, so it is possible that there is a problem with the head gasket.

I dont think theyre trying it on so much as trying to prevent a problem getting worse or eliminating possible causes along the way.

May 26th, 2006, 16:18

Update again:

Picked car up and got SOME good news. It's NOT the head gasket, and inlet manifold is also fine (which was my other major concern). However, the problem still remains unsolved, for the time being at least.

The error code thrown up by the computer is 3.1.3 Curiously, this code isn't on this website: http://www.troublecodes.net/Volvo/

But the garage showed me an error code book, where 3.1.3 code was something to do with a canister that should resend unused fumes back into the engine (?).

(Edit: 3-1-3 Carbonfilter valve?)

Apparently this is found underneath the wing, and involves removing a wheel arch. The error log has been reset, and the mechanic says bring the car back again next week after it's been run a little. Right now the misfire is not there, but he's confident it will return (as am I, unfortunately) and wants to make sure that is actually the problem before I start spending. So they were reasonable enough, and I suppose my cynicism got the better of me on this occasion.

Thanks for everyone's help, and I'll update again when I've been back, probably late next week.

May 26th, 2006, 16:52

Quote:

Originally Posted by Daniel M

Also, have you tried doing the diagnostic? If you haven't, try this link and it could help you find your problem. The car's quite clever, so will identify where the problem is.

http://www.troublecodes.net/Volvo/

Keep us posted and let us know when you solve it.

As an aside, where can i obtain the gadget to plug into this? How much (roughly) would you expect to pay?

Jun 24th, 2006, 08:57

Never did get a conclusion on this problem. Garage had car a few days, and just couldn't find the fault. The misfire is back to what it originally was. It had got worse, and it turns out this was my fault! When I changed the distributor cap + rotor arm I had not seated the rotor arm properly, and it had worked loose, wrecking the new cap. Ooops! (This was the first time I had replaced a cap + arm).

May 26th, 2006, 10:44	#11
740Estate Undercover 740 Last Online: Jun 2nd, 2007 12:14 Join Date: Nov 2003 Location: Cambs View Photos By: 740Estate	If the coolant looks clear, chances are it's the wrong mix. too much water would give rise to an increase in it's consumption and the temperature readings ( lower boiling point, etc, etc.) Like you say, hot weather, etc.. HOWEVER, you do have a misfire, so it is possible that there is a problem with the head gasket. I dont think theyre trying it on so much as trying to prevent a problem getting worse or eliminating possible causes along the way. __________________ 1991 960 3.0 24v - Project Dark ------------------------------------------------ "Ah, isn't that nice, the wife of the Cambridge president is kissing the cox of the Oxford crew." -- Harry Carpenter, BBC TV, Boat Race 1977. ------------------------------------------------ Slidin' it round past the apex of reality

May 26th, 2006, 16:18	#12
sheffield Guest Location:	Update again: Picked car up and got SOME good news. It's NOT the head gasket, and inlet manifold is also fine (which was my other major concern). However, the problem still remains unsolved, for the time being at least. The error code thrown up by the computer is 3.1.3 Curiously, this code isn't on this website: http://www.troublecodes.net/Volvo/ But the garage showed me an error code book, where 3.1.3 code was something to do with a canister that should resend unused fumes back into the engine (?). (Edit: 3-1-3 Carbonfilter valve?) Apparently this is found underneath the wing, and involves removing a wheel arch. The error log has been reset, and the mechanic says bring the car back again next week after it's been run a little. Right now the misfire is not there, but he's confident it will return (as am I, unfortunately) and wants to make sure that is actually the problem before I start spending. So they were reasonable enough, and I suppose my cynicism got the better of me on this occasion. Thanks for everyone's help, and I'll update again when I've been back, probably late next week. Last edited by sheffield; May 26th, 2006 at 16:50.

Jun 24th, 2006, 08:57	#14
sheffield Guest Location:	Never did get a conclusion on this problem. Garage had car a few days, and just couldn't find the fault. The misfire is back to what it originally was. It had got worse, and it turns out this was my fault! When I changed the distributor cap + rotor arm I had not seated the rotor arm properly, and it had worked loose, wrecking the new cap. Ooops! (This was the first time I had replaced a cap + arm).

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