Engine Stall when Coasting Issue
Discussion
Hi all,
I've searched the forums before and seen loads of posts since the Gaydon era Vantage came out up to 2016 that have an issue when you coast to a stop, it will stall.
In the 20 years of the cars existence - has anyone found a fix yet?
Is it needing new fuel lines to a catch can or is it just a quirk of the car?
Thanks all
I've searched the forums before and seen loads of posts since the Gaydon era Vantage came out up to 2016 that have an issue when you coast to a stop, it will stall.
In the 20 years of the cars existence - has anyone found a fix yet?
Is it needing new fuel lines to a catch can or is it just a quirk of the car?
Thanks all
What car have you got? Manual, auto or SS?
Does the engine idle ok? plus can you smell petrol from the exhaust?
Could be a vacuum leak, has there been any engine work completed recently?
The engine will try to keep to a preset idle, but it will struggle if the fuel or ignition systems have a fault.
Are there any fault codes plus are the short and long term fueling trims ok?
Does the engine idle ok? plus can you smell petrol from the exhaust?
Could be a vacuum leak, has there been any engine work completed recently?
The engine will try to keep to a preset idle, but it will struggle if the fuel or ignition systems have a fault.
Are there any fault codes plus are the short and long term fueling trims ok?
paulrog1 said:
What car have you got? Manual, auto or SS?
Does the engine idle ok? plus can you smell petrol from the exhaust?
Could be a vacuum leak, has there been any engine work completed recently?
The engine will try to keep to a preset idle, but it will struggle if the fuel or ignition systems have a fault.
Are there any fault codes plus are the short and long term fueling trims ok?
I've only had this issue twice in the last 2 years so every time I "coast" to a stop, I just downshift rev match and that seems to fix all the problems BUT it's a problem that should have had a fix by now and with how my brain works, I need to know it! Especially since these cars came brand new with the issue!Does the engine idle ok? plus can you smell petrol from the exhaust?
Could be a vacuum leak, has there been any engine work completed recently?
The engine will try to keep to a preset idle, but it will struggle if the fuel or ignition systems have a fault.
Are there any fault codes plus are the short and long term fueling trims ok?
I have a Manual 4.3 - engine idles okay - can't smell petrol from the exhaust - car goes in for service early Feb - no fault codes with this issue from all the forums I can see including no fault codes with my own - not sure what you mean by short and long term fuelling trims?
I replied to your post on 6speedonline, and it's here too, so:
I've had my 2009 V8V from new. This happened to me about 3 years ago -- decelerating on an exit after about 15 minutes on a highway, the engine shut down when I stepped on the clutch pedal as I approached the stop sign. It did it again a few days later, so I knew it wasn't a fluke. I called my dealer, who told me to do a "reset" (I don't remember exactly what I was resetting). As I recall, the procedure was: From 70 mph in top gear, decelerate (foot fully off the throttle) to 30 mph, without touching the brakes, and preferably in a straight line. Then accelerate up to 70 and repeat. Do this a total of 5 times. I went out at night on a highway that I expected to be pretty empty and, being careful that no one was behind me, went through the process. It worked -- it never stalled again.
I've had my 2009 V8V from new. This happened to me about 3 years ago -- decelerating on an exit after about 15 minutes on a highway, the engine shut down when I stepped on the clutch pedal as I approached the stop sign. It did it again a few days later, so I knew it wasn't a fluke. I called my dealer, who told me to do a "reset" (I don't remember exactly what I was resetting). As I recall, the procedure was: From 70 mph in top gear, decelerate (foot fully off the throttle) to 30 mph, without touching the brakes, and preferably in a straight line. Then accelerate up to 70 and repeat. Do this a total of 5 times. I went out at night on a highway that I expected to be pretty empty and, being careful that no one was behind me, went through the process. It worked -- it never stalled again.
I had this same issue quite regularly on mine (a v late 2019 4.7). I think it was something to do with the anti - stall (ironically!), but this problem completely disappeared after I had Bamford Rose do a slight remap, which leads to me to think it is software rather than hardware related.
Speedraser said:
I went through the process. It worked -- it never stalled again.
That's really good to know - so it looks like the misfire corrections procedure is what fixed yours. The only issue is it is very difficult to know whether or not it's stored! I might have to take mine out and hope I don't get rammed by a massive truck lol.Dungman said:
I had this problem repeatedly for about a week after fitting 200 cell cats and therefore confusing the downstream lambda sensors. Not on a single occasion prior to cat swap, and never since having a BR remap.
2009 4.7 manual
I'll note that for when I do 200 cell cats on mine - maybe the misfire corrections and an increase in RPM is suffice2009 4.7 manual
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