Over revving when changing gear enquiry
21 July 2012, 12:42 AM
#1
Over revving when changing gear enquiry
Has anyone experienced this:
Only just noticed but when I am putting my foot down & changing from 2nd - 3rd or 3rd - 4th gear the revs appear to increase by 300 - 500 revs as I engage the clutch.
For example if I lift off accelerator at 3500 in 2nd & engage clutch for 3rd at same time rev counter goes up to 3900. Now if I completely take my foot off accelerator and then engage clutch less aggressively it is not as bad.
The only thing I have changed is gone to centre de-resonated & backbox from my original Prodrive mid & backbox.
Anyone any ideas??
Only just noticed but when I am putting my foot down & changing from 2nd - 3rd or 3rd - 4th gear the revs appear to increase by 300 - 500 revs as I engage the clutch.
For example if I lift off accelerator at 3500 in 2nd & engage clutch for 3rd at same time rev counter goes up to 3900. Now if I completely take my foot off accelerator and then engage clutch less aggressively it is not as bad.
The only thing I have changed is gone to centre de-resonated & backbox from my original Prodrive mid & backbox.
Anyone any ideas??
21 July 2012, 06:28 AM
#4
has it been mapped recently?This happened to me after a remap,I was told it was the icv needed cleaning after going to see several "specialists"@ approx £60 a pop to try and get it fixed turns out it was a mapping issue for which i had to pay again to get it put right.If you decide to clean the icv get the rubber sealing ring beforehand,they seem to stretch when you take the icv off. One "specialist" tried to use silicon sealer instead of the ring.
21 July 2012, 08:23 AM
#5
Scooby Regular
Join Date: Feb 2004
Location: surrey
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
I did have the same prob after the last map over about 3000 rpm when going up the gears but as usual Simon (JGM) gave it a tweak for free, That's why I will always use him for my mapping he just must get it stop on.
21 July 2012, 10:08 AM
#6
has it been mapped recently?This happened to me after a remap,I was told it was the icv needed cleaning after going to see several "specialists"@ approx £60 a pop to try and get it fixed turns out it was a mapping issue for which i had to pay again to get it put right.If you decide to clean the icv get the rubber sealing ring beforehand,they seem to stretch when you take the icv off. One "specialist" tried to use silicon sealer instead of the ring.
Trending Topics
26 July 2012, 06:09 PM
#8
Scooby Regular
Join Date: Jun 2012
Location: In the gym in the ring or in the pub
Posts: 283
Likes: 0
Received 1 Like
on
1 Post
Mine does this too I hit the shift light remove my foot from the loud pedal the revs then drop. I engage the clutch the shift light then kicks off again even tho my loud foot is completely away from the loud pedal. I change gear release the clutch it rides like I can't drive and I feel stupid. Hopefully a remap will sort this I don't think its idle control valve as the car has no idle problems whatsoever.
26 July 2012, 08:29 PM
#10
Scooby Regular
Join Date: Jun 2012
Location: In the gym in the ring or in the pub
Posts: 283
Likes: 0
Received 1 Like
on
1 Post
apparently its something in the software of the car to reduce stress on transmission when changing gear. I'm sure a boffin will probs give more detail or correct me if i'm wrong.
Thread
Thread Starter
Forum
Replies
Last Post
Sam Witwicky
Engine Management and ECU Remapping
17
13 November 2015 10:49 AM
