High idle and jerks

YASHEN M

MEMBER
2010 OPEL CORSA
1.4L
4 CYL
2WD
MANUAL
131,000 MILES

Hi all,

My Corsa Utility Bakkie has an issue with the idle.
the van idles at 1,500 rpm up to 2,000 rpm.
I replaced the ICV with an aftermarket ICV from Goldwagon and reset the ECU by disconnecting the negative terminal.
The idle dropped and was fine for a few hours.
It then went back to 1,500 rpm and also has like a small jerk. Sometimes if switch off and start again its idle perfect and then back high. I do sometimes get a fuel smell from the front of the van.

Please assist guys as this is such pain to drive.

1 Reply

JACOBANDNICKOLAS

MECHANIC
108,244 POSTS

Hi and thanks for using 2CarPros.

First, this vehicle isn't offered in the US, so I don't have specific technical information on it. However, if you smell fuel, that is a concern. First, check to see if there are any leaks at the injectors, fuel rail, filter, fuel pressure regulator... A leak can cause idle issues because of a fluctuation in fuel pressure.

Next, if you can't find a leak, confirm that the fuel pressure is within the manufacturer's specs. Here is a link that shows in general how to check fuel pressure and regulator:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Also, check to see if there are any engine vacuum leaks. A vacuum leak can also cause an unsteady idle speed. Here is a link that shows how to check for one:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Let me know if any of this helps or if you have other questions.

Take care,
Joe