Rhino
Member
Registered: 18th Oct 03
Location: Falkirk
User status: Offline
|
I got a Flat spot when my revs hit about 5k and goes on till about 5.5k
Any ideas what this could be?
I've changed the inlet manifold and have a full exhaust with de-cat along with a induction kit.
The induction kit is in the bottom half of my airbox with cold air feeds.
Do you think its the filter??
Any help...cheers.
|
Cybermonkey
Member
Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
|
yeah because you have changed the dynamics of the engine, you will suffer flat-spots from mis-firing, fuel/air starvation or something along those lines.
|
Sri5
Member
Registered: 8th Jul 04
Location: Hull
User status: Offline
|
Get it chipped
|
Adam-D
Member
Registered: 11th May 02
Location: Cheshire
User status: Offline
|
aye id says get it chipped and set up properly
|
broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
|
what manifold have ypou got, i had standard management with my lexmaul and it was fine, greasemonkey runs his manzel engine on standard map and has no flat spots, i know it may be a myth, but did u reset the ecu?
|
Rhino@work
Member
Registered: 1st Sep 04
Location: Work!!
User status: Offline
|
Got the Regal one...
Hmmm..... how do you reset the ECU?
|
broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
|
regal one, the manzel one then? you just disconnect the battery for a while connect it up let the car run for a while and then drive it
|
blundey
Member
Registered: 25th May 04
Location: Flitwick, Bedfordshire
User status: Offline
|
Could also be ur induction kit causing the flat spot. Clean it, give it more cold air or whatever....see if it helps.
|
1600power
Member
Registered: 22nd Apr 04
Location: Shropshire Drives: 1.6 16v Sport
User status: Offline
|
quote:
Originally posted by brosterreset the ecu?
yes do this and all should be well!
disconnect battery leave for a 5 mins then reconnect and drive about for a good hour then it will hopefully be sorted!
|
Sri5
Member
Registered: 8th Jul 04
Location: Hull
User status: Offline
|
Thought it 60 mins for the ecu to reset
|
Rhino@work
Member
Registered: 1st Sep 04
Location: Work!!
User status: Offline
|
No not the Mantzel.... Dbilas.
Cool.... i'll try that.
Got plenty of cold air going to the filter so dont think that the prob.
|
1600power
Member
Registered: 22nd Apr 04
Location: Shropshire Drives: 1.6 16v Sport
User status: Offline
|
quote:
Originally posted by Sri5
Thought it 60 mins for the ecu to reset
nah that wud be the case if it had say a battery backup in operation, but corsas dont have anything like this installed so 5 mins is more than enough!
|
PaulW
Member
Registered: 26th Jan 03
Location: Atherton, Greater Manchester
User status: Offline
|
resetting the ECU doesn't do anything...
teh ECU is constantly learning/adapting to the conditions of the engine.
if anything, getting it mapped properly with a UniChip will give best results, but with any engine work, you always sacrifice drive-ability at times for power & so-on.
|
Rhino
Member
Registered: 18th Oct 03
Location: Falkirk
User status: Offline
|
Yeah, but when the flat spot is right near to the power band at 5k onwards its not to good.
The car accelerates good and smooth right to 5k where it seems to hold back.... untill it reaches 6k and its rapid again.
So annoyin like.
|
nicky_wilko
Registered: 1st Jan 70
User status: Offline
|
Mine Corsa C had a flat spot so i took it to the local tuning garage who then set up tha diagnostics and it was perfect after that. Only cost £35. Worth giving your local garage a call. Hope this helps. 
|
MoNkEy MaGiC
Member
Registered: 12th Apr 03
Location: West - London Drives: Corsa GSi
User status: Offline
|
what engine is it mate?
5.5k rev is PEAK power on a C16xe!!! so a flat spot their is really bad and not helping!
its likely you ned to get it mapped and uni-chipped so the engine runs well with the mods!
but it shoudnt cause a flat spot like that!... im pretty sure your induction kit in your air box is causing a restriction of air flow! so get rid of the air box completely and put at least 2 air feeds to it then see how it goes 
[Edited on 10-09-2004 by MoNkEy MaGiC]
|
broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
|
not with a dblis inlet, peak power will be at 7500ish with that inlet
|
