Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: frmg0014 on 11 September 2008, 14:46:47

Title: Bucking/Stumble
Post by: frmg0014 on 11 September 2008, 14:46:47

Hey guys!  I live in Toronto, Canada and own a 2001 Cadillac Catera which is equivalent to a 2001 Omega MV6? (im guessing here).  

I been experiencing a problem with my car and am hoping one of you can help me diagnose and repair this problem.

Recently, my car has developed a bucking/stumble which only occurs when the car is "on load" while cruising on the highway.

For example, If I'm cruising at 60mph (100km/h) on the highway, and there is a slight uphill and I accelerate A BIT.. it will start bucking/stumbling while it's accelerating!  The bucking/stumbling cannot be heard or seen on the tachometer.  The engine sound is constant, and rpm does not drop or anything while this is happening.  It can only be felt!

This will also occur if I had to slow down on the highway, and then accelerate back to speed again quickly.  So pretty much anytime there is load on the engine!

So far I've changed my fuel filter, transmission fluid, and spark plugs.  

I'm pretty much out of ideas.  I was really hoping it was the fuel filter, but unfortunately it's still happening after changing the fuel filter.  

Has anyone experienced this issue?  or has any ideas what it could be that's causing it?   :-/  :-?

Title: Re: Bucking/Stumble
Post by: ians on 11 September 2008, 15:46:18

Have you had leaking cam covers?  If so your HT leads may have had it..

Title: Re: Bucking/Stumble
Post by: Andy B on 11 September 2008, 16:14:34

Quote

Have you had leaking cam covers?  If so your HT leads may have had it..

IIRC The Catera uses the drive-by-wire like our 2.6 & 3.2 so will use a coil pack on each side rather than HT leads ....... but that's not to say the cam covers aren't leaking into the plug wells.
What about a failing crank sensor?

Title: Re: Bucking/Stumble
Post by: Agemo on 11 September 2008, 17:19:15

Just wondering if you could paperclip it.
 ::)

Title: Re: Bucking/Stumble
Post by: Entwood on 11 September 2008, 17:41:43

Don't think DBW can be paperclipped ..  but the pedal trick might work ??

http://www.omegaowners.com/forum/YaBB.pl?num=1189022687

:)

Title: Re: Bucking/Stumble
Post by: TheBoy on 11 September 2008, 19:01:24

Can you pinpoint noise to engine, or drivetrain?

Title: Re: Bucking/Stumble
Post by: frmg0014 on 14 September 2008, 23:04:10

Quote

Can you pinpoint noise to engine, or drivetrain?

no noise... i can only be felt.  It's feels as if the engine cuts out for a fraction of a second... and this keeps repeating every 3 seconds while accelerating up a slight up hill on a highway.

Title: Re: Bucking/Stumble
Post by: feeutfo on 15 September 2008, 11:11:59

Quote

Quote

Can you pinpoint noise to engine, or drivetrain?

no noise... i can only be felt.  It's feels as if the engine cuts out for a fraction of a second... and this keeps repeating every 3 seconds while accelerating up a slight up hill on a highway.

Does it kick slightly? As if a bump, but only from the
rear wheels? If so i "suspect" gear box.