7 weeks ago my V70 T5 (year 2000) started to misfire at startup. The misfiring goes on for about 30-40 seconds and only occurs when the engine is really cold. Typically it has to cool off for about 4 hours at an outside temp of around zero degrees Celsius, before the error shows up. Once the misfiring has gone, the engine runs excellently and no misfiring shows up even if I shut the engine down after only a few hundred metres of driving (typically the drive from the garage to my daughters day care center). If I let the car stay inside at room temperature so it don't get so cold, there is no misfiring even if I let the car stay for a full night! This together with the fact that the error goes away so quickly, leads me to think that some component close to the cylinder block has temperature problems.
The "check engine" lamp sometimes lights up and my mechanic tells me the error codes stored indicates misfire at several of the cylinders. My car has been in and out of workshop loads of times during the last weeks and I now start to get a bit "desperate". We have checked the ETM and all values are within range (there is also no error codes being stored about the ETM). All thinkable wiring has also been checked and we have replaced the ignition coils (one by one) and there was no change...
I use a non-Volvo mechanic for cost reasons and also because I have developed a solid relation with him and have confidence in him (he also has access to a Volvo "electronics-guru" because he's a friend of his) but he now starts to run out of options. One drawback of using a non-Volvo workshop is that he does not have access to the Volvo store of replacement parts... and this makes everything take longer time. I also feel reluctant to switch over to a Volvo workshop, because there has been so much time invested in the error already. It's a bit like turning around and swimming back when you're swimming across the English Channel and find that you can't manage the last 100 meters.. All checks we have done, will be redone if I switch mechanic now... I do have a friend that works at one of Volvos own garages though, and he tells me that a similar problem he had seen on 2001 V70 N, had been fixed by an upgrade of controlling software. From what we can see on my car though, the software has the latest version.
Has anyone seen anything like this or does anyone have any ideas?
All ideas are warmly welcomed!!!
Kjell
The "check engine" lamp sometimes lights up and my mechanic tells me the error codes stored indicates misfire at several of the cylinders. My car has been in and out of workshop loads of times during the last weeks and I now start to get a bit "desperate". We have checked the ETM and all values are within range (there is also no error codes being stored about the ETM). All thinkable wiring has also been checked and we have replaced the ignition coils (one by one) and there was no change...
I use a non-Volvo mechanic for cost reasons and also because I have developed a solid relation with him and have confidence in him (he also has access to a Volvo "electronics-guru" because he's a friend of his) but he now starts to run out of options. One drawback of using a non-Volvo workshop is that he does not have access to the Volvo store of replacement parts... and this makes everything take longer time. I also feel reluctant to switch over to a Volvo workshop, because there has been so much time invested in the error already. It's a bit like turning around and swimming back when you're swimming across the English Channel and find that you can't manage the last 100 meters.. All checks we have done, will be redone if I switch mechanic now... I do have a friend that works at one of Volvos own garages though, and he tells me that a similar problem he had seen on 2001 V70 N, had been fixed by an upgrade of controlling software. From what we can see on my car though, the software has the latest version.
Has anyone seen anything like this or does anyone have any ideas?
All ideas are warmly welcomed!!!
Kjell
