low rev misfires

[boxster]

Originally Posted by boggtown

If you can, adjust your throttle cable where it meets the throttle body so it has a "stronger" idle. That way it would be like holding your foot on the gas a little when at a stand still. And maybe keep your car from dieing.

good idea, at least i can do that until the problem is fixed!

[denverpete]

Have they checked the MAF?

[MNBoxster]

Hi,

Could be MAF, Fuel Filter, or any number of other things including a mechanical timing issue. I would not risk driving the car until it is sorted, you could cause major damage in some instances...

Happy Motoring!... Jim'99

[idheaton]

i agree with Jim in regards that it could be a number of things but worse case scenario....

misfiring can cause burnt valves (not good) and if it has to do with a bad cam..that means your valves are not in sync and that could mean the potential for bent valves and a damaged cylinder head...i shudder to think what that might cost.

not wanting to scare you as it may be something minor but as the saying goes...better safe than sorry.

good luck with figuring it out and i hope all turns out well with it.

[boxster]

Originally Posted by idheaton

i agree with Jim in regards that it could be a number of things but worse case scenario....

misfiring can cause burnt valves (not good) and if it has to do with a bad cam..that means your valves are not in sync and that could mean the potential for bent valves and a damaged cylinder head...i shudder to think what that might cost.

not wanting to scare you as it may be something minor but as the saying goes...better safe than sorry.

good luck with figuring it out and i hope all turns out well with it.

yeah i agree, though the garage told me that i there doesnt seem to be any risks if i carry on driving, im mot feeling so comfortable driving it, especially when i'm in traffic and the engine shudders and dies!

[ohioboxster]

Kinda funny you used the German "Lambdasonden" for oxygen sensor.

[denverpete]

Originally Posted by boxster

yeah i agree, though the garage told me that i there doesnt seem to be any risks if i carry on driving, im mot feeling so comfortable driving it, especially when i'm in traffic and the engine shudders and dies!

An engine that dies at idle, misfires, and is severely "out of tune", and they can't find the problem - but they think it's okay to drive? I think you need a new Porsche mechanic.

Yes, the MAF could be responsible for these problems - at least in the beginning. Some of what you are experiencing could simply be the after effects of running with a bad MAF.

You can keep driving it - but exactly how many more problems are you interested in fixing?

[ohioboxster]

Unplug the MAF see if it goes away.

[boxster]

Originally Posted by MNBoxster

Hi,

Could be MAF, Fuel Filter, or any number of other things including a mechanical timing issue. I would not risk driving the car until it is sorted, you could cause major damage in some instances...

Happy Motoring!... Jim'99

fuel filter is new. i dont think they checked the MAF though. does it usually effect the revs when the MAF is dirty or needs replacing?

[boxster]

Originally Posted by denverpete

Have they checked the MAF?

no i dont beleive they did. could it be that it needs replacing?