Weird Hesitation / Air leak?

coupedan

Member
 West Berkshire
Afternoon all!

So.. weird issue when I started my car this morning - after being parked up for more than 42 hours.

I get in this morning and start her up to which felt like it started too quickly (Almost stumbled, coughed and spluttered into life)
I start driving and notice something is not right as I nearly stalled the thing (Which is rare for me!)
Upon putting my foot down to accelerate, the engine sounded as if it took a big gulp of air before it wanted to carry on.. not like the instant response I would normally expect.
I also noticed it felt really slow, like I had 50BHP instead of 265BHP!
I thought it may be the cold weather this morning (It has never done it before but hey must be a one off).. until it was still doing the same after 30 mins of driving, when in neutral the RPM's were hunting slightly - I could also slam my foot to the floor when in neutral (like a blip of full throttle) and it would only rev to around 1500RPM, also sounding like it is taking a gulp of air before doing so.

Anyway by the end of my journey ~ around 35 miles, I thought it must be an air leak with how it sounds plus no EML being on.
So parked up, engine off, I pop the bonnet open to take a look, no sign of any air leaks from what I can see without any specialist tools etc..

Now here's the weird bit; I started the car up again to find that all is ok, revs freely like it did on Sunday (When I last drove it) and also pulls like it used to..

Has anyone had any similar issues at all?

Also note, I have noticed a slight rattle on warm starts (After it has been driven) .. I hope it is not the dreaded VANOS rattle :thumbsdown:

Cheers,
Dan.
 
That is indeed strange! Without any obvious physical fault, it is very difficult to find the problem, especially if is not doing it any more. You might check for any stored error codes, even if there is no service engine light on. Beyond that, don't worry about it until it occurs again.
 
So an update on this; it has been driving completely fine over the last few days - I have it booked into the stealers on Monday to check it out whilst I get them to check a random wheel wobble I have been having at exactly 35MPH - My car is not too happy with me at the moment :x
 
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