Anyone else had engine misfiring problem with AMV8?
Discussion
Hi all,
Posting for a mate(honest) with an AMV8 misfiring problem. He's on his second car, now that's having the same problem as well. Basically power loss for less than a second then back to normal. Happened about five times over the space of a year. Aston say he's the only
person to ever have this problem.
Any advice, ideas etc.
Many thanks
Posting for a mate(honest) with an AMV8 misfiring problem. He's on his second car, now that's having the same problem as well. Basically power loss for less than a second then back to normal. Happened about five times over the space of a year. Aston say he's the only
person to ever have this problem.
Any advice, ideas etc.
Many thanks
As it is his second car with the same problem, it makes me think that it could be something that has happened post factory/dealer and is caused by something in the cars natural environment.
How often does he wash the car and how does he do it? One thing that it could be is a pressure washer forcing water into places that it shouldn't be.
Any other ideas guys?
How often does he wash the car and how does he do it? One thing that it could be is a pressure washer forcing water into places that it shouldn't be.
Any other ideas guys?
polar57 said:
Hi all,
Posting for a mate(honest) with an AMV8 misfiring problem. He's on his second car, now that's having the same problem as well. Basically power loss for less than a second then back to normal. Happened about five times over the space of a year. Aston say he's the only
person to ever have this problem.
Same problem here, exactly as described. It's not a huge issue due to the infrequency but it is something I'd like to get sorted out. Not due for another service until November time so if your mate gets it seen prior to that and is given a diagnosis then I'd appreciate a pm. Likewise if I do find out sooner. My guess is a fuel starvation problem as the symptoms are instant cut out albeit for a fraction of a second.Posting for a mate(honest) with an AMV8 misfiring problem. He's on his second car, now that's having the same problem as well. Basically power loss for less than a second then back to normal. Happened about five times over the space of a year. Aston say he's the only
person to ever have this problem.
Steve
p.s. mine is a MY 07
Thanks for the replies,
Very interesting to hear of another with the same problem, could be water getting in, coils etc. It has happened on a road near the end of a runway, and also near a radar head, so he did think interference of some kind, but also happened in other random places. Its still being investigated so I'll post more if they ever get it sorted.
Cheers.
Very interesting to hear of another with the same problem, could be water getting in, coils etc. It has happened on a road near the end of a runway, and also near a radar head, so he did think interference of some kind, but also happened in other random places. Its still being investigated so I'll post more if they ever get it sorted.
Cheers.
*CQ* said:
polar57 said:
Hi all,
Posting for a mate(honest) with an AMV8 misfiring problem. He's on his second car, now that's having the same problem as well. Basically power loss for less than a second then back to normal. Happened about five times over the space of a year. Aston say he's the only
person to ever have this problem.
Same problem here, exactly as described. It's not a huge issue due to the infrequency but it is something I'd like to get sorted out. Not due for another service until November time so if your mate gets it seen prior to that and is given a diagnosis then I'd appreciate a pm. Likewise if I do find out sooner. My guess is a fuel starvation problem as the symptoms are instant cut out albeit for a fraction of a second.Posting for a mate(honest) with an AMV8 misfiring problem. He's on his second car, now that's having the same problem as well. Basically power loss for less than a second then back to normal. Happened about five times over the space of a year. Aston say he's the only
person to ever have this problem.
Steve
p.s. mine is a MY 07
My car has 1900 km and has had the same problem three times , not sure it's a missfire , more like a hiccup -the engine cuts out for a fraction of a second only to resume normal behavior afterwards.
Each time it happened when trundling along in sixth gear at low ( maybe too low ? )revs
Each time it happened when trundling along in sixth gear at low ( maybe too low ? )revs
Hi there
I'm the guy who Polar 57 refers to! I've just posted the stuff below on another thread on this site:
I've had quite a lot of problems with my two Vantages. The original one went back to the dealer 6 or 7 times. The main problem i had is the engine briefly cutting out and my being thrown forward on the seatbelt. This happened about 12 times on my first Vantage in all sorts of conditions. To be fair to the dealer and to Aston they put a lot of time and effort into sorting it - including loaning me a car. That (the loan car) had the same problem on two occasions. The car had numerous other problems including electric windows failing, sound system failing, gearbox problems, a leaky boot, air mass flow sensor issues and other bits and bobs. Eventually, they gave me another car on a very good p/ex basis as I threatened to take it back to Aston and to set fire to it in front of their offices!! The new car has also had the same cutting out problem on three occasions. Aston sent a chap up with a data-logger but it has yet to crap-out with the data logger fitted to it. Other than that it's a pretty good car.... If anybody else has come across this problem then pelase let me know as I (and Aston) are anxious to find out what the problem is.
I'm the guy who Polar 57 refers to! I've just posted the stuff below on another thread on this site:
I've had quite a lot of problems with my two Vantages. The original one went back to the dealer 6 or 7 times. The main problem i had is the engine briefly cutting out and my being thrown forward on the seatbelt. This happened about 12 times on my first Vantage in all sorts of conditions. To be fair to the dealer and to Aston they put a lot of time and effort into sorting it - including loaning me a car. That (the loan car) had the same problem on two occasions. The car had numerous other problems including electric windows failing, sound system failing, gearbox problems, a leaky boot, air mass flow sensor issues and other bits and bobs. Eventually, they gave me another car on a very good p/ex basis as I threatened to take it back to Aston and to set fire to it in front of their offices!! The new car has also had the same cutting out problem on three occasions. Aston sent a chap up with a data-logger but it has yet to crap-out with the data logger fitted to it. Other than that it's a pretty good car.... If anybody else has come across this problem then pelase let me know as I (and Aston) are anxious to find out what the problem is.
I'll be interested to see if you get to the bottom of the cutting out, I have one that does exactly the same thing, yet stores no fault codes. Its an N24 so the electrics are a little different but its a total cut out that requires a restart. Earth terminals seem to come up alot as theres so much aluminium the earths need to be spot on.
As for the missfire - had that on another car from new - not water on the coil as the car never went out in the wet! removed the offending coil(it was quite a tricky one to remove when hot) and swapped it for one on another cylinder to see if it went to that one. No problem re-occured so may have just been poor connection to the sparkplug. Done 2500kms since.
As for the missfire - had that on another car from new - not water on the coil as the car never went out in the wet! removed the offending coil(it was quite a tricky one to remove when hot) and swapped it for one on another cylinder to see if it went to that one. No problem re-occured so may have just been poor connection to the sparkplug. Done 2500kms since.
I think I may have solved the problem.... Removing fuse F22 from the fuse holder in the boot causes the exhaust valve to remain open all the time - not just when it gets to 4000rpm. Since removing it the problem with the cutting out has gone away (fingers crossed!). And the exhaust note at low revs is fabulous as well!!
oceantools said:
I think I may have solved the problem.... Removing fuse F22 from the fuse holder in the boot causes the exhaust valve to remain open all the time - not just when it gets to 4000rpm. Since removing it the problem with the cutting out has gone away (fingers crossed!). And the exhaust note at low revs is fabulous as well!!
Afraid not. I had the fuse removed the day I picked the car up and I still have the issue.
whoami said:
oceantools said:
I think I may have solved the problem.... Removing fuse F22 from the fuse holder in the boot causes the exhaust valve to remain open all the time - not just when it gets to 4000rpm. Since removing it the problem with the cutting out has gone away (fingers crossed!). And the exhaust note at low revs is fabulous as well!!
Afraid not. I had the fuse removed the day I picked the car up and I still have the issue.I'm wondering if the knock sensor is a little too sensitive.....
stanwan said:
whoami said:
oceantools said:
I think I may have solved the problem.... Removing fuse F22 from the fuse holder in the boot causes the exhaust valve to remain open all the time - not just when it gets to 4000rpm. Since removing it the problem with the cutting out has gone away (fingers crossed!). And the exhaust note at low revs is fabulous as well!!
Afraid not. I had the fuse removed the day I picked the car up and I still have the issue.I'm wondering if the knock sensor is a little too sensitive.....
Fuel is usually Optimax or other super type fuels. Never used the 99 octane stuff.
I've even had the problem on the M6 toll-road doing an indicated 80mph and with the cruise-control on... As an electronics engineer, I still think it could be electro-magnetic interference, especially as the car has cut out close to Aberdeen airport's main radar (twice within 100metres) and once at the end of the runway where, presumably, the ILS it pointing at the car.
What's the consensus on removing Fuse22... If the factory do it and fit a £300 switch then surely it's okay to take it out??
What's the consensus on removing Fuse22... If the factory do it and fit a £300 switch then surely it's okay to take it out??
oceantools said:
I've even had the problem on the M6 toll-road doing an indicated 80mph and with the cruise-control on... As an electronics engineer, I still think it could be electro-magnetic interference, especially as the car has cut out close to Aberdeen airport's main radar (twice within 100metres) and once at the end of the runway where, presumably, the ILS it pointing at the car.
What's the consensus on removing Fuse22... If the factory do it and fit a £300 switch then surely it's okay to take it out??
Mine was done by the main dealer.What's the consensus on removing Fuse22... If the factory do it and fit a £300 switch then surely it's okay to take it out??
Gassing Station | Aston Martin | Top of Page | What's New | My Stuff