Engine briefly cutting out
Discussion
oceantools said:
To do with emissions control and sounded like it was dumping fuel and not vapour into the engine.... They are getting back to me with more detailed information later.
I'm glad it is resolved, though! That's close to two years it's taken them to get to the bottom of it......
YHMI'm glad it is resolved, though! That's close to two years it's taken them to get to the bottom of it......
Steve - I've been on their case for almost two years! This time around, the tracking systems has failed as has the DSC/TCS (they're good these Astons - very reliable. Guaranteed to break down every month!). While arranging for these other problems to be sorted they phoned to say they'd sussed out the cause of the cutting-out problem.
oceantools said:
Steve - I've been on their case for almost two years! This time around, the tracking systems has failed as has the DSC/TCS (they're good these Astons - very reliable. Guaranteed to break down every month!). While arranging for these other problems to be sorted they phoned to say they'd sussed out the cause of the cutting-out problem.
Kevin, Thanks for that, I'll raise this once again at the next service. Sounds like you have a lemon....what year is it?No - I don't think it is a lemon as such. My first one had numerous problems - tracker kept going off, handbrake handle broke, electric windows failed, sound system failed, water leaked into the boot through a hole in the body, TCS failed, lots of rust in engine, gear linkage changed etc. My second one has had lots of tracker faults, TCS faults, issues with the brightness of the zenons etc. They are pretty enough looking cars but the overall quality is very, very poor unfortunately. Not what I'd expect from a £90k car!!
Took my brandnew MY09 4.7 out for a spin today and hat the engine briefly cutting out 
Was cruising at 80 kph and gave instant throttle in 5th gear, engine was cutting out for a fraction of a second then came back.
I was expecting this to be solved with the new 4.7 engine because they must have made a complete new mapping but somehow they have actually managed to carry the failure over to the new mapping.
Is there any official fix for this now ?
Was cruising at 80 kph and gave instant throttle in 5th gear, engine was cutting out for a fraction of a second then came back.
I was expecting this to be solved with the new 4.7 engine because they must have made a complete new mapping but somehow they have actually managed to carry the failure over to the new mapping.
Is there any official fix for this now ?
bmartin said:
Took my brandnew MY09 4.7 out for a spin today and hat the engine briefly cutting out
Was cruising at 80 kph and gave instant throttle in 5th gear, engine was cutting out for a fraction of a second then came back.
I was expecting this to be solved with the new 4.7 engine because they must have made a complete new mapping but somehow they have actually managed to carry the failure over to the new mapping.
Is there any official fix for this now ?
It's a pisser isn't it.Was cruising at 80 kph and gave instant throttle in 5th gear, engine was cutting out for a fraction of a second then came back.
I was expecting this to be solved with the new 4.7 engine because they must have made a complete new mapping but somehow they have actually managed to carry the failure over to the new mapping.
Is there any official fix for this now ?
I had the same issue with my 4.3 (never sorted) and now it's on the 4.7 too.
Great.
Yes, - there is a fix for it. They are coming to take my car away on Tuesday, I hope, and have told me they now understand the problem (emissions control related, I believe, but am waiting for them to confirm it). I should have the car back a week on Tuesday. I will report back sometime around that time and will let you know what the fix involved. From what they have said it is fairly significant....
oceantools said:
Yes, - there is a fix for it. They are coming to take my car away on Tuesday, I hope, and have told me they now understand the problem (emissions control related, I believe, but am waiting for them to confirm it). I should have the car back a week on Tuesday. I will report back sometime around that time and will let you know what the fix involved. From what they have said it is fairly significant....
Yes, please let us know what they did (if they tell you) and if it helped. How often/regularely did you have the problem ?superlightr said:
So is this fault happening to all AMV8 owners?
Had similar problems with an M5 some years back and it would stop me getting an AM until this serious fault is fixed. I would be concerend about losing power when pulling out of a junction.
This has happended to me. To be honest they (local dealer) don't seem to be taking it too seriously. Had similar problems with an M5 some years back and it would stop me getting an AM until this serious fault is fixed. I would be concerend about losing power when pulling out of a junction.
oceantools said:
Yes, - there is a fix for it. They are coming to take my car away on Tuesday, I hope, and have told me they now understand the problem (emissions control related, I believe, but am waiting for them to confirm it). I should have the car back a week on Tuesday. I will report back sometime around that time and will let you know what the fix involved. From what they have said it is fairly significant....
A week to sort it out - sounds like they don't really know the problem !!I hope you guys get this sorted ,the following applies generally and not specifically to AM, but to help the chap diagnosing, you need to keep an accurate log of when the fault occured, i.e pulling away, lean cruise, air temp and water temp at time etc an engine will only cut out if it runs briefly too lean eg overwhelmed by air on initial pull away eg the the TPS does not sense correctly to tell the ecu to apply the enrichment map,or looses spark on multiple firings,unlikely unless an electrical grounding isssue occurs. I would guess its an out of tolerance sensor, air, water or lambda, TPS + MAF thats pretty much all the bases covered. to give an example I had a bmw doing exact same thing all was fine on the diagnostics with out any fault codes logged , eventually managed to go wrong whilst in the "shop " so to speak and it was a £7.50 water temp sensor very intermittantly reading 150 degrees c the ecu just shutdown the engine to protect it. I guess my point is paying 90 grand on a car ,why they (garages) don't just change these sensors is beyond me as a matter of course when a customer complains. Personally when I get to own one of these lovely beauties if it gave me relentless trouble I'd just stick an emerald Ecu in and job done fully programmable by yourself with all the monitoring you could wish for . Sorry I digress good luck with it, these faults can be frustrating and ruin the ownership experience , sensors are cheap
Ive been reading this with interest also...
One of the N24's was doing this, from new. We spent several hours checking earths, fusebox and power connections all to no avail.
There originally was a quirk with the starting in that if you stalled after a spin for example, you'd have to remove and replace the ignition key to restart. As I understood it, in effect you reset one of the relays.
When the car cuts out its a total cut, not a splutter, missfire or hesitation. When this happened you could still restart the car on the button which said to me the problem could be the other side of the ecu (not the power to it).Back at the workshop, after a few hours of starting and stopping, removing fuses and checking codes (incidentally no codes were ever stored) I swapped over the injector relay for (the same)one next to to it, as this seemed to simulate the cutting out symptoms. Since then - touch wood - the car has not stalled since and has probably done 500+ race kms. Bearing in mind we had repeated cut outs, 2 or 3 in a 20 minute window, at different circuits.
Not sure if this has any relevance to others on here, but might help.
One of the N24's was doing this, from new. We spent several hours checking earths, fusebox and power connections all to no avail.
There originally was a quirk with the starting in that if you stalled after a spin for example, you'd have to remove and replace the ignition key to restart. As I understood it, in effect you reset one of the relays.
When the car cuts out its a total cut, not a splutter, missfire or hesitation. When this happened you could still restart the car on the button which said to me the problem could be the other side of the ecu (not the power to it).Back at the workshop, after a few hours of starting and stopping, removing fuses and checking codes (incidentally no codes were ever stored) I swapped over the injector relay for (the same)one next to to it, as this seemed to simulate the cutting out symptoms. Since then - touch wood - the car has not stalled since and has probably done 500+ race kms. Bearing in mind we had repeated cut outs, 2 or 3 in a 20 minute window, at different circuits.
Not sure if this has any relevance to others on here, but might help.
there is an excellent little gadget which i use to help with diagnosing faults like these, it records eobd data whilst driven, if a fault occurs which the ecu flags a code it times and dates the event, even if a code is not flagged as long as the driver records the date and time the data can be reviewed later, it is a very small unit that can be fitted safely in about 30 seconds, we have even posted this with instructions to customers, then when they experience the fault they return the device, and or car for testing, it does not always show the exact fault, but can prove what is ok, i have had some on cars that are hired out, so the road speeds and revs etc can be checked to see if the car has been lets say driven aggressively.
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