Sudden drop in power
Discussion
Last night driving back along the M4 I was crusin' at about 70 when I suddenly had a drop in revs and loss of power, I changed down a gear and it continued so I had to pull over to the hard shoulder where it stalled. Then I tried to start her up again and all was fine. The oil pressure and temp were fine when this was happening but has now happened 3 times but this is first time i've had to pull over.
Any ideas of what this could be, luckily still under warranty if any serious probs!
Any ideas of what this could be, luckily still under warranty if any serious probs!
I've had similar symptoms from various causes.
To start with, check whether the rev counter continues to read. If not, I would be inclined to suspect an ignition fault.
When it dies, if it will *almost* keep running with no throttle at tickover, or at least sounds as if it was trying, but cuts as soon as you open the throttle, that points to a lack of fuel pessure most likely from a failing fuel pump relay but possibly a duff inertia cut off switch, corroded fuse holder or similar. If you don't hear the pump prime when you try to restart, that would confirm it is a fuel pump power supply problem.
A faulty alarm can cause fuel and/or ignition system problems.
To start with, check whether the rev counter continues to read. If not, I would be inclined to suspect an ignition fault.
When it dies, if it will *almost* keep running with no throttle at tickover, or at least sounds as if it was trying, but cuts as soon as you open the throttle, that points to a lack of fuel pessure most likely from a failing fuel pump relay but possibly a duff inertia cut off switch, corroded fuse holder or similar. If you don't hear the pump prime when you try to restart, that would confirm it is a fuel pump power supply problem.
A faulty alarm can cause fuel and/or ignition system problems.
could be as simply as ht leads shrouds not connecting properly
I checked mine and found that the plug shrouds were loose - pinched them with a pair of thin nose pliers
Then the HT lead was split and shorting against the exhaust
New shrouds and HT leads sorted it
If it fuel then good luck - Im no mechanic !
I checked mine and found that the plug shrouds were loose - pinched them with a pair of thin nose pliers
Then the HT lead was split and shorting against the exhaust
New shrouds and HT leads sorted it
If it fuel then good luck - Im no mechanic !
GreenV8S said:
I've had similar symptoms from various causes.
So have I, it was...
GreenV8S said:
a lack of fuel pessure most likely from a failing fuel pump relay but possibly a duff inertia cut off switch, corroded fuse holder or similar. If you don't hear the pump prime when you try to restart, that would confirm it is a fuel pump power supply problem.
corroded fuse holder in my case - the loose one in the loom by the battery.
I too had similar problems. I also had big clouds of black smoke from the exhaust when the problem occurred. Ended up being the air mass flow sensor. I don't want to worry you but htis is about £150 - £200 for a new one.
Could be any number of things - worth visiting a specialist for diagnosis as opposed to replacing every part as that method can get very expensive.
Best of luck and I hope its a cheapo item.
Could be any number of things - worth visiting a specialist for diagnosis as opposed to replacing every part as that method can get very expensive.
Best of luck and I hope its a cheapo item.
I had my immobiliser fail at the most dreadful times, mid over take on a country road aint nice !! You brake, the car you are over taking brakes, Arhh, very embarrasing. Knowing a "bit" i over rode the thing to get me home. It has three seperate ciruits, ignition,fuel pump and starter solenoid.
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