Rough Idol

[Casssss]

Hey all,

I have a VP series 2 and having a bit of a problem with it.
When the car is idoling both hot and cold it is missing causing a very rough idol.
Ive changed plugs, leads, tried another coil pack, cleaned my injectors.

problem is still there. it only misses on cylinder 6 and when the car revs alittle its sweet as.

Any suggestions what it could be?

 

[pow3rslave]

did you just change the coil pack or do the ignition module as well?

 

[crazybiker]

It's possible that the bellmouth that's in the top of the intake manifold has been removed. It was designed to allow more even airflow to the back to cylinders for a better idle.

 

[Casssss]

did you just change the coil pack or do the ignition module as well?

No i just switched the single coil pack......got it off a mate had a spare one.....
Might give that a go.

If the ignition module went, then would both the plugs not be working for instance 6 & 3?

 

[Casssss]

It's possible that the bellmouth that's in the top of the intake manifold has been removed. It was designed to allow more even airflow to the back to cylinders for a better idle.

Nah i know its still in there cause the car has been in the family since new, its schmick as.....would removing it help you think to get more air flow?

 

[crazybiker]

No. Leaving it in there helps it get more airflow.

The bellmouth was designed to allow better airflow for the back to 2 cylinders

 

[Casssss]

fair enough well its still in there so that's swett

 

[crazybiker]

I'd have a look at the DFI module then next.

 

[Casssss]

I'll try changing it asap and let you know how it goes.....

Anyone ever experienced anything similar?

 

[crazybiker]

I had mine completely stalling. Wouldn't idle.

Turn up to a set of lights, and you'd lose the benefits of power steering and the brake booster.

Mine was a Throttle Position Sensor problem.