FN2 Revs 'Hanging'

[Facian]

Hi All,

Just picked up an FN2 Type R as a daily, as I was dying of boredom driving a Saab diesel to/from work. I've noticed that when changing at high revs the engine seems to 'hang' or even rev up for a second before dropping, which makes quick gearchanges a bit messy/unsatisfying.

Is this a feature of the car or a fault? My EP3 never did this, but obviously that was cable throttle rather then DBW and a few other differences I'm sure.

If this isn't normal, where do you think I should start looking? Throttle position sensor perhaps?

Thanks

James

[traffman]

Hi James , ive had issue's with this in my old Ep3 just after leaving it idle for 2 weeks.

The revs would hang on , up to around 3.5k. All i did was take it for a proper blast down some B roads and it cleared it's throat.

I have had issue's with my current Ep3 , it has a Skunk Tb and inlet and it used to be quite sticky. However since ive been using the car with it fitted now (it was a secondhand TB) it's absolutely fine.

Also does the FN2 have an ICV? May need a spray with some intake cleaner if so.

[HorneyMX5]

Mine did this. I always thought it was mapped in to counter the light flywheel causing the revs to drop too fast for casual drivers when they lift for a change. I got used to it fairly quickly and it never bothered me after that.

[krismccloy]

I found this with my FN2 when I had it, especially going from a DC2. I thought this was a normal trait of the FN2 with a heavy balancer shaft for the oil pump, like a heavy flywheel effect. But unsure the extent of yours, I got used to mine after a little while and got satisfying changes using most the red line.

Although my dads 2.2 Diesel has a similar issue but is an intermittent fault with the TB and has 175k on the clock.

[Leejay-B]

It's the standard ECU map.

FN2 rev hang is a common complaint. You either have to live with it or go for a custom remap with hondata or ecutek.

[Facian]

Sorry all, forgot to check back in with this thread! I've quite quickly adapted to it, and barely notice it now. Might be an excuse for a map at some point though, if I decide to start playing around with the car a little!