hi all, i have just joined the forum, a member on many motorbike forums but never needed help until today with my girlfriends corsa.
she has a 2006 last of the corsa c models with the 1.3 cdti engine in 64k on the clock. Bought it 2 years ago from a main dealer and it has had no problems until now.
it has develpoed a rough idle and rev either when hot or when cold. If you start it up and dont touch the throttle it will idle perfect all day if it was left and will rev through cleanly once, the problem occurs when it comes back down to idle from touching the throttle. It starts running lumpy, not massively but so you can tell and will rev all the way up but no where near as smooth. It drives okay with no loss of power that i can tell but she said it uses more fuel and the mot guy ofther week said its just passed on emmisions due to black smoke exessive. If you turn the car off and restart it, it will run smooth again on idle until the throttle is touched then its back to rough idle and revving.
ive had it on a delphi laptop and it shows no codes at all. This is why its puzzling me. The things ive tried are cleaning maf, egr and intake as best i can. I have done a leak off test last night and the resukts are as follows, at idle for around 2 min with warm engine cylinder 1 is 60mm, 2 65mm, 3 90mm and 4 is 70mm with my pots only lholding 100mm i stopped when one pot got to 90mm. Does this sound right? Also the test was done with the engine idling rough not smooth, should i do anither with a smooth idle and if that comes back any different?
i hope someone can help or jnow where to point me! I have searched through the forum for answers but not come across this exact problem. Many thanks, lee
she has a 2006 last of the corsa c models with the 1.3 cdti engine in 64k on the clock. Bought it 2 years ago from a main dealer and it has had no problems until now.
it has develpoed a rough idle and rev either when hot or when cold. If you start it up and dont touch the throttle it will idle perfect all day if it was left and will rev through cleanly once, the problem occurs when it comes back down to idle from touching the throttle. It starts running lumpy, not massively but so you can tell and will rev all the way up but no where near as smooth. It drives okay with no loss of power that i can tell but she said it uses more fuel and the mot guy ofther week said its just passed on emmisions due to black smoke exessive. If you turn the car off and restart it, it will run smooth again on idle until the throttle is touched then its back to rough idle and revving.
ive had it on a delphi laptop and it shows no codes at all. This is why its puzzling me. The things ive tried are cleaning maf, egr and intake as best i can. I have done a leak off test last night and the resukts are as follows, at idle for around 2 min with warm engine cylinder 1 is 60mm, 2 65mm, 3 90mm and 4 is 70mm with my pots only lholding 100mm i stopped when one pot got to 90mm. Does this sound right? Also the test was done with the engine idling rough not smooth, should i do anither with a smooth idle and if that comes back any different?
i hope someone can help or jnow where to point me! I have searched through the forum for answers but not come across this exact problem. Many thanks, lee
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