Misfire at idle only ....

[Pheedbak]

Hello all so cars a 996 C2 coupe 1999, manual RHD UK model and its being bad :(

The engine warning light came on the other day and at idle the engine was a little rough and smelt of unburnt fuel. So ive taken it to local specialist (3 times now) and its reporting a misfire on cylinder 3. They have so far eliminated a mechanical fault with the engine (they did leakdown test), the coils and sparkplugs etc, the air induction system. So they are having alot of trouble working it out :( The car has some ebay sports exhaust fitted from a guy in germany i havent heard any problems but could it be that? The next thing will be refitting the original exhaust then they are proposing to switch ECU's with a donor car... sounds like they are running out of options ... any thoughts ...

forgot to say the problem only appears at idle ...

TIA

Phil

Edited May 30, 2006 by Pheedbak

[Loren]

Fault code(s)?

Have they looked at the ICV (Idle Control Valve) solenoid?

Only MY98 and 99 C2's have an ICV.

[Scouser]

Could be MAF, plugs, leads, ignition coils too.

Where did you take your car Phil. A good Porker indy shop would fix it no problems. Surprised they have run out of ideas....

[Pheedbak]

its in tognola engineering in datchet. They seem good guys. They have replaced MAF, plugs , leads coiils. They are gonna replace a broken varioCam unit on the right bank although the misfire is in the left bank in an attempt to have everything that can be fixed, fixed.

Loren - not sure on the fault codes ill ask. ICV ill mention it to them on my daily visit ;)