I am aware there are many discussions on the hestitation after remap problems but does anybody experience the kind of hestitation as it seems to be slightly different.

Its a Mk1 octy vrs, remapped to 210bhp, new forge 007 dv, cotton panel filter, vpower petrol. Had new spark plugs fitted after remap and a coil pack has gone and been replaced.

On cold start in the mornings usually, the car is very loud for about 3-5 mines, as if an exhaust is blowing. This doesnt seem to cause any problems and stops once engine is at running temp. Only did this after the remap. Is this the secondary air pump that needs checking??

Onto the hestitation issue.

When I accelerate and keep the accelerator in a constant postion there doesnt seem to be an issue, however in normal driving and hard driving, if I ease of the accelerator, regardless of how much, the car seems to hestitate or lose power 2 or 3 times. Its hard to explain but seems to happen when the accelerator is released. This loss of power or hestiating causes reduces the smoothness of the drive and is to be honest quite annoying now and taking the fun out of the remap, even to point that I might revert back to stock map.

I'm not sure if its down to the map or another component that needs looking at but any views and experiences anyone has would be appreciated.

The extra noise after starting sounds like it could be the secondary air pump. I'd take the undertray off so you can see the air pump and check wither the two halves of the pump are coming apart where the rivets are loose - if so take the pump off and replace the rivets with bolts.

As for the hesitation could be the DV if it is happening when you are coming off the throttle, sounds like maybe the spring in the DV is set too hard and it is not releasing the boost quick enough when you shut the throttle and is causing lag. Try adjusting the DV (instructions on the Forge website) to make it a bit softer. Also give it a fault code scan and maybe discuss options with whoever remapped it to take a look at it and work out what the problem is? If they have a dyno they should be able to run it with VAG-Com attached to monitor things like the N75 etc. to check that they're not goosed

My octy vRS Mk1 has no engine mods other than a forge 006 dv. My car sounds like the exhaust is blowing when it's warming up. I'd always assumed that this was normal due to the secondary air pump. Not checked whether the air pump is leaking/rivets gone, cos the sound isn't overly bad.

With regard to hesitation;My car has always had an issue with hesitation when pulling away on a light throttle. A bit like mentioned here, it seems to be after setting off and then backing off the accelerator a fraction. When it happens it is like for a split second the engine is completely dropping power then it returns ok. Very strange. Like I say, my engine is standard appart for the forge dv, but it did this before i had the dv fitted. I had always assumed that the throttle body might need a clean and position re-set. So far I've not had time to clean it. Might try a re-set via my liquid gauge.

Well I get a very similar thing with mine and have a very similar set-up by the sounds of it as the OP.

Now I don't think a remap caused this, more that it enhanced the problem. The noise on start-up is more than likely the secondary air pump. The hesitation on mine only happens when the engine is cold and the secondary air pump has stopped, with light acceleration it will feel like it starts to come on boost then drops back down for a split second.

The car will not do this once warmed up and has no boost issues so not sure if this is the same issue as you get, but I find the Revo map not as smooth as standard, but then I suppose a car with more boost and HP is not going to be a smooth as Revo map is quite aggresive from what I have heard.

Thanks for the posts.

Might have a look into the N75 valve/sensor and fit a new one to see if that makes any difference with improving the hesitation, as I've read this is a fairly common problem and doesnt sound like a big job.

Then think I'll try the throttle body cleaning, although I havent got vag.com to reset it.

The forge divertor valve that was fitted with the remap had a yellow spring which I think is the correct one so cant see it being that.

But it is definately when you ease of the throttle that is has this hesitation and slight loss of power. Really want to solve this problem as its annoying !

If anyone else has had this problem and has cured it please let me know what you did and if anyothers are experiencing the hesitation on easing accelerator please let me know, might help us find a remedy!

Well I get a very similar thing with mine and have a very similar set-up by the sounds of it as the OP.

Now I don't think a remap caused this, more that it enhanced the problem. The noise on start-up is more than likely the secondary air pump. The hesitation on mine only happens when the engine is cold and the secondary air pump has stopped, with light acceleration it will feel like it starts to come on boost then drops back down for a split second.

.

That sounds normal too me, some cars do it , some don't

Mine used too do it, but doesn't anymore, I have no idea why :confused:

Well I get a very similar thing with mine and have a very similar set-up by the sounds of it as the OP.

Now I don't think a remap caused this, more that it enhanced the problem. The noise on start-up is more than likely the secondary air pump. The hesitation on mine only happens when the engine is cold and the secondary air pump has stopped, with light acceleration it will feel like it starts to come on boost then drops back down for a split second.

.

That sounds normal too me, some cars do it , some don't

Mine used too do it, but doesn't anymore, I have no idea why :confused:

It doesnt feel normal, its not right. A car shouldnt judder when you accelerate smoothly.

It doesnt feel normal, its not right. A car shouldnt judder when you accelerate smoothly.

Does it do this when warm ???

If it's only when stone cold for the first minute or two it can be classed as normal.

If it's when warm then you go see your mapper.

Does this even when warm. I've just spoke to r-tech guys and they suggested the same, bring it down to them and they will have a look at it.