Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: khatton on 22 September 2008, 14:44:25

Title: hesitation on acceleration
Post by: khatton on 22 September 2008, 14:44:25

i thought it was a misfire at first but not so sure now took it to wales 100 miles on the motorway its fine when your crusing but try to put your foot down to quick and it hesitates keep your foot down and it does clear up when the revs get higher,  its bad  to drive round town i am wondering if its a blocked injector, on tickover it sounds fine if you use the throttle gently its not so bad but put your foot to the floor and it starts hesitating its starting to bug me i put new plugs in it oh and its not as bad when the engine is cold any help would be great as i am ready to run it into a tree. >:(

Title: Re: hesitation on acceleration
Post by: khatton on 22 September 2008, 14:47:42

sorry its a 2.5 v6 tourer estate on a p plate :-[

Title: Re: hesitation on acceleration
Post by: Jimbob on 22 September 2008, 14:53:24

Has it been serviced recently?  including air & fuel filter?

have you checked any of the spark plug wells for oil?

Title: Re: hesitation on acceleration
Post by: khatton on 22 September 2008, 15:07:06

fuel filter is not that old air cleaner is ok no oil in plugs

Title: Re: hesitation on acceleration
Post by: MutantCav on 22 September 2008, 15:10:15

Auto or manual??? Has the gearbox level been checked/topped up??

Title: Re: hesitation on acceleration
Post by: khatton on 22 September 2008, 19:21:15

manual gearbox

Title: Re: hesitation on acceleration
Post by: batista on 22 September 2008, 19:46:50

have you done paper clip test,sounds similar to crank sensor..

Title: Re: hesitation on acceleration
Post by: bigkev on 22 September 2008, 22:09:15

My sons w plate 2.5 had similar problem.  Engine hunting between tickover and 1500 rpm then seemed o.k.  Also sounded odd for first thirty seconds after starting and could smell petrol which is unusual on modern cars.  Turned out to be ignition coil block with side blown out.  £130.  Beware the guy told us there are 4 different types and 2 different sets of plug leads.  Real pain to get at.  Mounted behind heads/air intake and fixed to bulkhead.  Worth a look.

Title: Re: hesitation on acceleration
Post by: khatton on 23 September 2008, 14:16:12

cheers will do paper clip test

Title: Re: hesitation on acceleration
Post by: khatton on 23 September 2008, 14:29:38

i got a code 19 only no rpm signal what does this mean i should check and could this be my problem 2.5 v6

Title: Re: hesitation on acceleration
Post by: khatton on 23 September 2008, 14:42:06

did search found out its crankshaft sensor can this be cleaned also where is the icv on a 2.5 v6 think i will clean this to am i on the right lines to sorting this out would this problem cause my hesitation

Title: Re: hesitation on acceleration
Post by: cem_devecioglu on 23 September 2008, 15:21:12

Quote

did search found out its crankshaft sensor can this be cleaned also where is the icv on a 2.5 v6 think i will clean this to am i on the right lines to sorting this out would this problem cause my hesitation

Crank sensor must be changed..

And as far as I can remember when I changed my crank sensor my hesitation was also lost..

For ICV its to the left of plenum on the passenger side

here is
(http://i181.photobucket.com/albums/x80/mecdv6/v6enginebay.jpg)

Title: Re: hesitation on acceleration
Post by: khatton on 23 September 2008, 18:18:42

thanks for that i will post results when i get one and hope that is it :y

Title: Re: hesitation on acceleration
Post by: terry big timber on 26 September 2008, 12:29:41

Have you cleaned the butterflies on the throttle body at the front of the engine?

Title: Re: hesitation on acceleration
Post by: pkov6 on 26 September 2008, 13:05:18

Hi, I feel your pain ! I can't wait to see the results as I have exactly the same hesitation, but I did the paper clip test and it says there are no faults. I don't know what to do next, dealer told me it ws crank sensor so I've replaced the crank sensor and it is exactly the same as before.
 :( :-?