Jerky driving!

i had similar problem with my 08 lacetti .all i did was take the slack out of the accelerator cable at the throttle body end , it seemed to work for mine.

The garage said it's the EGR valve as when they blocked it off the car didn't seem so bumby when driving.

£210 later the new EGR valve has made no difference!  It's particularly noticeable when the weather ia warm and the car is in 4th or 2nd gear.

I'm taking it back on Monday I haven't paid them for it!  I've asked if they'll put the old one back as I'm unwilling to pay £210 when it doesn't fix the problem!

As I say they want it back on monday to see what else it could be.

Anyone on here any ideas?

They did say I mayhave to take the car to a Chevrolet dealership and get them to align the EGR valve with the engine with a computer?

Hi thanks for the reply.

To cut a long story short the garage have admitted the new EGR valve made no diference.

Even replacing the plugs and cables hasn't done anything.

So the original EGR valve has been put back in the engine.

The mechanic did notice one thing though (and I'm still wondering why it wasn't noticed 2 weeks ago!)

With the engine cover removed looking at it from the front of the car at the top left corner is the throttle cable.

When he applied some pressure it revved but when he left it for a few seconds the revs dipped.

He said the same as me when driving at a fixed speed say 30mph in 4th the accelerator would need pressing as the car would suddenly start to jerk a bit.

He said I should take it to a Chevrolet dealer (will ring tomorrow) as they have the correct software on their engine diagnostic computer.

But this does sound very much like your problem,  though if it's as easy to correct as you seem to say I'm surprised they didn't just do what you have done.

Or did they just want rid of me?

Here's something I've been wondering since I was quoted £906 then down to £590 for the work to be carried out.

Having checked with VOSA there was never a recall for this sticking valve problem on Lacetti/Nubiras.

Yet when we questioned the price we were told to hang on then they'd get back in touch.

I think (and the guy at our local garage thinks) a call went to Chevrolet along the lines of we've got another car in with sticking valves. Too which the answer would have been ok let them pay for the part and we'll pay for the fitting. Or vice versa.

As the guy at our local garage said why would they knock so much money off and also why have theychanged this part if so few people had a problem?

All seems VERY underhand to me, obviously Chevrolet won't admit there IS a problem as it will cost them money. So reducing the price like they have for me doesn't wash I'm afraid. You get knowt for knowt!

Does anyone else out there have this problem and how much did they pay to get it fixed?

Does anyone have any views on this?

This isn't the last of it as far as I'm concerened I was initially grateful they knocked the price down but why should I pay £590 because they used a dodgy valve in my car?

Is it worth starting another post headed something like "the great sticking valves cover up"

Post the question on honest john's website - he has brilliant inside info and may be able to assist you if there is an unofficial problem which Daewoo / chevrolet wont admit to it may become obvious after posting the question on his website. I find his info invaluable.

www.honestjohn.co.uk