Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: PaulW on 14 November 2007, 12:43:33

Title: Developed a flat spot...
Post by: PaulW on 14 November 2007, 12:43:33
Upto around the 4000rpm mark, the engine feels very down on power, then as soon as you hit 4000, its like its getting a swift kick up its arse and just launches itself!

any ideas??  It's making driving a bit of a chore lately, as the autobox just doesn't shift like it used to due to the lack of power...
Title: Re: Developed a flat spot...
Post by: hotel21 on 14 November 2007, 12:45:01
Multirams smooth out power delivery upto about 4 - 4.5 k revs.  Sound slike a vac leak or similar...
Title: Re: Developed a flat spot...
Post by: Markie on 14 November 2007, 13:04:45
Quote
Multirams smooth out power delivery upto about 4 - 4.5 k revs.  Sound slike a vac leak or similar...


Absolutely....also have someone plip the throttle and check both multi rams...back moves about 4k...

Outwith this check all the connections from both multi rams and to the vac tank are secure untangled and not damaged...

How is idle ?
Title: Re: Developed a flat spot...
Post by: AndersH on 14 November 2007, 16:00:44
Mine's just started doing pretty much the same thing! Don't really understand how to check the multirams though...
Title: Re: Developed a flat spot...
Post by: PaulW on 14 November 2007, 16:03:18
Quote
Quote
Multirams smooth out power delivery upto about 4 - 4.5 k revs.  Sound slike a vac leak or similar...


Absolutely....also have someone plip the throttle and check both multi rams...back moves about 4k...

Outwith this check all the connections from both multi rams and to the vac tank are secure untangled and not damaged...

How is idle ?

Not as smooth as it used to be once warmed up, it fluctuates a little...
Title: Re: Developed a flat spot...
Post by: PaulW on 14 November 2007, 16:17:40
Right...

Front ram is working, its opening and closing

The rear one (from where I can see and feel) is doing bugger all...

Checked the vac lines, but damned if I know where they should be routed to...

I can't see or hear any vac leaks.
Title: Re: Developed a flat spot...
Post by: Markie on 14 November 2007, 17:57:01
Quote
Right...

Front ram is working, its opening and closing

The rear one (from where I can see and feel) is doing bugger all...

Checked the vac lines, but damned if I know where they should be routed to...

I can't see or hear any vac leaks.


Okay fluctuating idle - worth a full breather clean for starters......check plug wells and lead condition whilst your at it. It may or may not fix the idle and in turn help smoothness, but its certainly not going to do any harm.

Back multi is best seen from passenger side whilst someone revs the car and its like a little switch that will move "on and off" as it hits 4 - 4.5k
Title: Re: Developed a flat spot...
Post by: Darth Loo-knee on 14 November 2007, 18:35:22
Quote
Right...

Front ram is working, its opening and closing

The rear one (from where I can see and feel) is doing bugger all...

Checked the vac lines, but damned if I know where they should be routed to...

I can't see or hear any vac leaks.

Have a look at this link mate  :y
http://www.omegaowners.com/forum/YaBB.pl?num=1152565204
Title: Re: Developed a flat spot...
Post by: PaulW on 14 November 2007, 18:54:12
I'll re plumb the system again tomorrow, but from what I can tell it all seems fine & proper... So wondering could it be the solenoid valve on the rear which turns the rear ram on & off??

Breathers are ok.  They were fully flushed out about 2k miles ago, and the car has only done long journeys & never gummed up (check oil every journey)  Also wipped a breather off earlier to check and it was fine inside :)
Title: Re: Developed a flat spot...
Post by: Alan on 16 November 2007, 11:01:01
I just Know I'm going to regret this but...

How do you get yours reving up to 4k?  I've had mine for a month and LOVE it, but it changes up at around 3 and I'm doing 55-60 at under 2k - when I overtake on a dual carrageway it just majestically powers up to illegal speeds, but I've never gone over 3k. (and when your last car was a fiat brava, beleive me that majestic is the right word)  ;D

This means 1) I'm a wimp driver or 2) err.. can't think of a 2..  
does everyone run theirs in sports mode?

p.s. my wife now rolls her eyes whenever I keep mentioning how wonderful the car is  ;D

Alan

Title: Re: Developed a flat spot...
Post by: Marks DTM Calib on 16 November 2007, 11:05:53
Quote
I just Know I'm going to regret this but...

How do you get yours reving up to 4k?  I've had mine for a month and LOVE it, but it changes up at around 3 and I'm doing 55-60 at under 2k - when I overtake on a dual carrageway it just majestically powers up to illegal speeds, but I've never gone over 3k. (and when your last car was a fiat brava, beleive me that majestic is the right word)  ;D

This means 1) I'm a wimp driver or 2) err.. can't think of a 2..  
does everyone run theirs in sports mode?

p.s. my wife now rolls her eyes whenever I keep mentioning how wonderful the car is  ;D

Alan


If you floor the throttle it should go close to red line even if its not in sport mode.

If it doesn't check the following:

1) There is no carpet mat below the throttle pedal.
2) There is no slack in the throttle cable, this is adjustable at the thottle end of the cable in the engine bay.

Title: Re: Developed a flat spot...
Post by: davlad22 on 16 November 2007, 12:19:10
Quote
Upto around the 4000rpm mark, the engine feels very down on power, then as soon as you hit 4000, its like its getting a swift kick up its arse and just launches itself!

Somebody fitted a turbo while your back's been turned!?!  ;D