Omega Owners Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Please check the Forum Guidelines at the top of the Newbie section

Pages: [1] 2  All   Go Down

Author Topic: Misfire/Hesitation at 4000 rpm  (Read 1956 times)

0 Members and 1 Guest are viewing this topic.

ScottieMV6

  • Omega Knight
  • *****
  • Offline Offline
  • Gender: Male
  • Swinton, Manchester
  • Posts: 1140
    • View Profile
Misfire/Hesitation at 4000 rpm
« on: 14 April 2010, 10:00:12 »
Took my car back to MOT station this morning for retest and on the way there was a misfire/hesitation at 4000 rpm.

Idles and runs fine up to 4000 but then its as if it wants to cut out.

Any thoughts much appreciated :y
Logged
I'd rather be scared to death than bored to death!!

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34016
  • Git!
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #1 on: 14 April 2010, 10:09:11 »
Any fault codes?

Is the fuel filter nice and new or old, manky and blocked?

Was the cemblet timing all set up correctly?
Logged

ScottieMV6

  • Omega Knight
  • *****
  • Offline Offline
  • Gender: Male
  • Swinton, Manchester
  • Posts: 1140
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #2 on: 14 April 2010, 10:20:08 »
Its still at the MOT station at the minute so can't check for fault codes. Fuel filter could probably do with a change. Cambelt timing all set up correctly as far as I know (though I did it myself following the DVD so could be completely wrong) :D :D
Logged
I'd rather be scared to death than bored to death!!

ScottieMV6

  • Omega Knight
  • *****
  • Offline Offline
  • Gender: Male
  • Swinton, Manchester
  • Posts: 1140
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #3 on: 14 April 2010, 18:31:51 »
Got the car back and checked codes. It showed 46 which is SAI (still can't work out what is causing that) and 19. Cleared codes and ran the car again and only 46 came back.

Stuck with this now.  :-/ :-/
Logged
I'd rather be scared to death than bored to death!!

cem_devecioglu

  • Guest
Re: Misfire/Hesitation at 4000 rpm
« Reply #4 on: 14 April 2010, 18:35:31 »
sensor problem..and cam sensor is #1 candidate imo..
« Last Edit: 14 April 2010, 18:40:40 by cem_devecioglu »
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34016
  • Git!
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #5 on: 14 April 2010, 18:41:59 »
Disagree Cem....crank sensor is faulty!

But change the fuel filter
Logged

cem_devecioglu

  • Guest
Re: Misfire/Hesitation at 4000 rpm
« Reply #6 on: 14 April 2010, 18:48:42 »
Quote
Disagree Cem....crank sensor is faulty!

But change the fuel filter

ok here is the bet 10 £ from me ;D :y
Logged

Andy H

  • Omega Lord
  • *****
  • Offline Offline
  • Gender: Male
  • Auckland
  • Posts: 5533
    • Mazda MPV
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #7 on: 14 April 2010, 19:46:26 »
Worth checking that the crank sensor plug/connector is firmly in place.

My guess is that (as heat damage to the crank sensor cable has been cited as a cause of crank sensor failure) moving cables around to get the head gaskets changed has accelerated the demise of the cable.
Logged
"Deja Moo - The feeling that you've heard this bull somewhere before."

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34016
  • Git!
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #8 on: 14 April 2010, 20:10:37 »
Quote
Quote
Disagree Cem....crank sensor is faulty!

But change the fuel filter

ok here is the bet 10 £ from me ;D :y

Easy money as code 19's NEVER occur without good reason  :y
Logged

cem_devecioglu

  • Guest
Re: Misfire/Hesitation at 4000 rpm
« Reply #9 on: 14 April 2010, 20:15:53 »
Quote
Quote
Quote
Disagree Cem....crank sensor is faulty!

But change the fuel filter

ok here is the bet 10 £ from me ;D :y

Easy money as code 19's NEVER occur without good reason  :y

no code 19 mentioned in the original post :-?

ok then 10 £ is yours.. :y
Logged

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34016
  • Git!
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #10 on: 14 April 2010, 20:17:51 »
Quote
Quote
Quote
Quote
Disagree Cem....crank sensor is faulty!

But change the fuel filter

ok here is the bet 10 £ from me ;D :y

Easy money as code 19's NEVER occur without good reason  :y

no code 19 mentioned in the original post :-?

ok then 10 £ is yours.. :y

No but, scottie mentioned a 19 in his...... ;)...which is crank sensor incorrect signal
Logged

cem_devecioglu

  • Guest
Re: Misfire/Hesitation at 4000 rpm
« Reply #11 on: 14 April 2010, 20:21:22 »
Quote
Quote
Quote
Quote
Quote
Disagree Cem....crank sensor is faulty!

But change the fuel filter

ok here is the bet 10 £ from me ;D :y

Easy money as code 19's NEVER occur without good reason  :y

no code 19 mentioned in the original post :-?

ok then 10 £ is yours.. :y

No but, scottie mentioned a 19 in his...... ;)...which is crank sensor incorrect signal

thats not fair ;D

anyway you will get your tenner.. check your pm

by the way hesitation over 3500-4000 rpm is %90 cam sensor (I double check it) :y

Yes, camsensor will kick in limp home mode and apply a 4K rev limit, so will knock sensors (more common to see these damaged).


Never yet seen a V6 cam sensor actualy fail but, have seen them damaged due to incompitence
« Last Edit: 14 April 2010, 20:24:03 by Mark »
Logged

Lazydocker

  • Omega Queen
  • *****
  • Offline Offline
  • Gender: Male
  • Woodbridge, Suffolk
  • Posts: 18848
  • Constantly Bullied by a certain Admin
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #12 on: 14 April 2010, 20:46:26 »
Quote
Quote
Quote
Disagree Cem....crank sensor is faulty!

But change the fuel filter

ok here is the bet 10 £ from me ;D :y

Easy money as code 19's NEVER occur without good reason  :y

So why have I got one with (yet another) new sensor?
Logged
Whatever it is... I didn't do it

Marks DTM Calib

  • Administrator
  • *****
  • Offline Offline
  • Gender: Male
  • West Bridgford
  • Posts: 34016
  • Git!
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #13 on: 14 April 2010, 21:17:08 »
Quote
Quote
Quote
Quote
Disagree Cem....crank sensor is faulty!

But change the fuel filter

ok here is the bet 10 £ from me ;D :y

Easy money as code 19's NEVER occur without good reason  :y

So why have I got one with (yet another) new sensor?

Have you tried re-fitting it.....particularly at the block end
Logged

ScottieMV6

  • Omega Knight
  • *****
  • Offline Offline
  • Gender: Male
  • Swinton, Manchester
  • Posts: 1140
    • View Profile
Re: Misfire/Hesitation at 4000 rpm
« Reply #14 on: 14 April 2010, 22:02:22 »
So are we saying its crank sensor or cam sensor. I;ve always thought that 19 was crank sensor but Cem's description sounds exactly like my symptoms. :-/
Logged
I'd rather be scared to death than bored to death!!
Pages: [1] 2  All   Go Up
« previous next »
 

Page created in 0.015 seconds with 16 queries.